Evaluation of Tubular Adhesively-Bonded Joints under Torsion | Chapter 9 | Research and Developments in Engineering Research Vol. 6

 This work acts a numerical study so that compare the torsional performance of three adhesive, in aluminium tubular joints (AW6082-T651), taking everything in mind the variation of the main geometric limits, such as overlie length (LO) and tubes’ thickness. The growing demand for light weight, excellence and more cost effective product has influenced adhesive fastening to emerge as one of the basic ways of catch structural members. Adhesive cheap hangouts have been earlier been designed tentatively but now moment of truth's data is available to design sticking joints in an best way. In order to envision the strength, the Finite Element Method (FEM) was used accompanying Cohesive Zone Models (CZM), whose analysis located itself on the internal stresses of the adhesive, that is to say the analysis of clip stress (txy) and joint strength, measured for one maximum torsional moment (Mm). To administer the torsion load, a reference point was conceived in the middle of television set and it was connected to the cross-sectional face converging joint end, which admitted applying a torsional angle boundary condition and accordingly performing the tests. The joint meshes were erected after defining the mesh sizes in each edge of the model. Previously, confirmation with exploratory data was carried out. The method was positively justified, and a significant geometry on Mm was erect, except for LO.

Author(s) Details:

T. J. S. Oliveira,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

M. S. Kirgiz,
Department of Civil Engineering, Faculty of Engineering and Architecture, T.C. istanbul Gelisim University, Avcilar, istanbul 34310, Turkiye.

M. V. Kumar,
Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, India.

R. Alzein,
Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, India.

Please see the link here: https://stm.bookpi.org/RADER-V6/article/view/11557

Calculation Approach for the Design of Adhesive Joints under Predominant Peel | Chapter 3 | Research Highlights in Science and Technology Vol. 3

 There are now different guaranteed joint geometries that the designer can choose from, containing the single-lap joint, double-lap joint, walked-joint, scarf joint, and tubular joint. Other geometries are designed to maintain peel loads, such as T-intersections and L-joints. T-joints are secondhand in different synopsises, including in aircraft (something that holds up structure/skin joints) and in instruments (B-pillar/person who produces music joints). The present work consists of a mathematical analysis on the sticking type effect in aluminium T-joints under peel loads, by cohesive district modelling (CZM). However, CZM confirmation is previously accomplished. The junctures’ assessment introduces with stress analysis, and prognosis of maximum load (Pm), while geometrical modifications are too tested, to authorize proposing the best resolution for the joint. CZM revealed expected an accurate tool for these intersections, and a significant lines and adhesive influence was detected on the joint conduct, which authorized to propose the best joint answer.

Author(s) Details:

J. P. M. Lopes,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/RHST-V3/article/view/10753

Shear Fracture Behaviour of Bonded Joints by Application of the Direct Integration Method | Chapter 4 | Research and Developments in Engineering Research Vol. 4

 The cut fracture toughness (Gsc) and CZM societies of bonded cheap hangouts were investigated in this study. This was adept using completely-Notched  Flexure (ENF) test geometry. Design can be equip toward lighter constructions utilizing adhesive bonding, not only by way of the immediate burden saving advantages of the links over fastened or welded joints, but still because  of the adaptability to link diverse materials. Cohesive Zone Models (CZM) are a forceful design tool, but they demand the CZM laws of the adhesive bond in tightness and shear as recommendation. The experimental effort complicated characterizing the bond's shear rupture using common and J-integral approaches. Furthermore, the precise arithmetic of the cohesive standard was established using the J-basic technique. Numerical Finite Element (FE) simulations in Abaqus® were acted to assess the correctness of the create CZM laws in envisioning the experimental behavior of the ENF tests, and the verdicts were positive.  The CZM laws of the proven adhesive told a good agreement between examples. As a result of this work, fracture facts in shear for the chosen sticking is provided, permissive the subsequent strength prognosis of bonded cheap hangouts.

Author(s) Details:

R. L. Fernandes,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/RADER-V4/article/view/10741

Experimental Evaluation of the Peel Characteristics of Structural Adhesives | Chapter 2 | Research and Developments in Engineering Research Vol. 4

 Peel tests are established to characterize the peel substance of bonded junctures and to control the adhesion quality. In this research, the adherend effect on the peel substance of a brittle sticking is experimentally intentional using the buoyant roller peel test with the aim of review how the adherend changes influences the adhesion possessions on brittle adhesive and also to investigate the being of using the buoyant roller peel test in composite-to-composite and composite-to-aluminium cheap hangouts, and perform the particular comparison with aluminium-aluminium cheap hangouts. On the other hand, it is also destined to prove the relevance of this test for control of product quality of adhesion and determination of peel substance in joints accompanying composite materials. The results show that the Araldite® AV138 accomplishment falls within the characteristic principles of peel strength of added brittle structural adhesive, with very narrow discrepancies in the persistent parameters.

Author(s) Details:

J. P. O. Pereira,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, Porto-4200-072, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, Porto-4200-072, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, Porto-4200-465, Portugal.

Please see the link here: https://stm.bookpi.org/RADER-V4/article/view/10739

Mixed-mode Fracture Analysis of a Structural Adhesive by Contour Integral Concepts| Chapter 4 | Techniques and Innovation in Engineering Research Vol. 7

 Adhesive joint strength prediction mostly relies on the Finite Element Method (FEM), with preponderance to the cohesive zone modelling (CZM) approach due to excellent predictive capabilities. This work aims to validate the application of FEM-CZM to the analysis of single-leg bending (SLB) adhesive joints. Thus, the geometries used for experimental testing were reproduced numerically and experimentally obtained properties were employed in these models. Upon the validation of the numerical technique, a parametric study involving the cohesive laws’ parameters is performed aiming to evaluate their influence on the overall behaviour of this type of adhesive joint. As a result of this work, it was possible to numerically model SLB tests of adhesive joints and estimate the mixed-mode behaviour of a structural adhesive, which enables mixed-mode modelling and design of adhesive structures.

Author(s) Details:

L. F. R. Neves,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

I. J. Sanchez-Arce,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TAIER-V7/article/view/9119

Bonded Joint Strength Prediction by the Inverse Method| Chapter 2 | Techniques and Innovation in Engineering Research and Technology Vol. 5

 High performance fundamental adhesive are now being used often in the car subdivision to decrease bus weight and enhance the crash fighting of automotive buildings. The souped up adhesives secondhand in the car subdivision must able to have or do endure weighty active loads apart from bearing extreme mechanical substance so that meet these necessities.   Because of their difficult behaviour, the design process required to generate constructions accompanying these fabrics necessitates a all-encompassing understanding of their machinelike features. In this work, the machinelike features of a structural gluing, Sikapower® 4720, were persistent. Tensile tests were acted to decide the Young’s modulus (E) and tensile strength (σf). Shear tests were acted to decide the clip modulus (G) and the cut strength (Tf). Tests were still completed activity to decide the sticking's toughness. For manner I determination perseverance (GIc), the Double-Cantilever Beam (DCB) test was working. For decision of toughness under way II (GIIc), completely-Notched Flexure (ENF) test was acted. The test verdicts were able to wholly automatically delimit the sticking and show that it not only has strong machinelike substance but too a large size of ductility.

Author(s) Details:

F. A. L. Viana,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial (INEGI), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.

R. J. B. Rocha,
Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial (INEGI), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TAIERT-V5/article/view/9053

Evaluation of a Novel Structural Adhesive for the Automotive Industry| Chapter 1 | Techniques and Innovation in Engineering Research and Technology Vol. 5

 High performance fundamental adhesive are now being used often in the car subdivision to decrease bus weight and enhance the crash fighting of automotive buildings. The souped up adhesives secondhand in the car subdivision must able to have or do endure weighty active loads apart from bearing extreme mechanical substance so that meet these necessities.   Because of their difficult behaviour, the design process required to generate constructions accompanying these fabrics necessitates a all-encompassing understanding of their machinelike features. In this work, the machinelike features of a structural gluing, Sikapower® 4720, were persistent. Tensile tests were acted to decide the Young’s modulus (E) and tensile strength (σf). Shear tests were acted to decide the clip modulus (G) and the cut strength (Tf). Tests were still completed activity to decide the sticking's toughness. For manner I determination perseverance (GIc), the Double-Cantilever Beam (DCB) test was working. For decision of toughness under way II (GIIc), completely-Notched Flexure (ENF) test was acted. The test verdicts were able to wholly automatically delimit the sticking and show that it not only has strong machinelike substance but too a large size of ductility.

Author(s) Details:

J. P. R. Monteiro,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial (INEGI), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TAIERT-V5/article/view/9052

A Comprehensive Experimental Study on Bi-Adhesive Technique Applied to Structural T-Joints | Chapter 3 | Techniques and Innovation in Engineering Research Vol. 1

 T-joints are employed in a variety of industries, including the automotive, marine, and aerospace sectors. The bi-adhesive technique, which uses two adhesives and places a harder adhesive in the centre and a more flexible one at the overlap ends, is examined in this paper. The effectiveness of this approach in T-joints was tested using various adhesive ratios. A numerical research was conducted utilising the CZM technique in the ABAQUS® software to assess this idea. It included an examination of failure modes, stresses, strength or maximum load (Pm), and dissipated energy (U). Using the current work, the CZM approach was originally confirmed through experimental findings. The numerical work that followed showed that it is possible to raise Pm and U in comparison to single-adhesive joints and that the strength of T-joints is strongly dependant on the adhesive mixture utilised.

Author(s) Details:

P. M. D. Carvalho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

I. J. Sánchez-Arce,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

R. J. B. Rocha,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

A. R. F. Soares,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TAIER-V1/article/view/8174

Mechanical and Fracture Property Estimation of a Structural Adhesive | Chapter 2 | Techniques and Innovation in Engineering Research Vol. 1

 When using advanced fracture mechanics-based techniques, such as cohesive zone models, it is not enough to understand the conventional mechanical properties, such as Young's modulus (E), shear modulus (G), tensile strength (f), and shear strength (f), to predict crack propagation of an adhesive joint (CZM). Actually, it's also important to estimate the tensile and shear fracture energies (GIIC). A new structural two-component epoxy adhesive's mechanical and fracture properties are being characterised in this work. Four tests were carried out for this purpose: end-notched flexure, double-cantilever beam, thick adherend shear tests, and tensile testing to bulk specimens (ENF). The test outcomes supported the manufacturer's data and allowed for the construction of bonded structures with this glue.

Author(s) Details:

J. E. C. Pinto,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TAIER-V1/article/view/8173

Experimental and Numerical Study on Single-lap Bonded Joints by the Extended Finite Element Method| Chapter 12 | Current Overview on Science and Technology Research Vol. 2

 The eXtended Finite Element Method (XFEM) is an original technique in view of the Finite Element Method (FEM). Due to the capacity to incorporate break development inside strong components, the XFEM is especially appropriate to displaying break spread. The current work comprises of a mathematical examination of adhesively-reinforced joints with various calculations by the XFEM in Abaqus®, taking into account various standards for harm commencement and regulations for harm engendering. This technique is exact while utilizing the triangle spread regulation and the quadratic pressure (QUADS) inception rule, as per the XFEM study. It was likewise shown that the most critical variables deciding the strength of the joints are the joint design, the related layered boundaries, and the glue type.

Author(s) Details:

V. Ramesh,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and  INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/COSTR-V2/article/view/7998

Validation of Numerical Approach for the Analysis of Adhesively-bonded Scarf Joints | Chapter 9 | Technological Innovation in Engineering Research Vol. 7

 The numerical method that is most frequently used for adhesive bonds is the Cohesive Zone Model (CZM). In order to predict joint strength under mixed-mode loading, this work validates CZM laws in traction and shear that were calculated by using the direct technique. This chapter looked at scarf joints with different scarf angles () and adhesives with different ductilities. Based on pure-mode cohesive laws, simplified triangular, trapezoidal, and exponential laws were created and assessed for each glue. Their validity was determined by comparing the numerical predictions to the results of the experiments. By using the direct method, it was possible to produce extremely accurate predictions for the maximum load (Pm), which showed that cohesive law shape was best for each adhesive/geometry combination. This analysis has led to the conclusion that no significant Pm mistakes are incurred by the selection of a less appropriate law.

Author(s) Details:

D. F. O. Silva,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and  INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V7/article/view/7925

Scarf Adhesive Joints between Different Adherends by Experimental and Numerical Modelling| Chapter 8 | Technological Innovation in Engineering Research Vol. 7

 For the aim of structural optimization, composite materials must now frequently be combined with other lightweight metals, such as titanium or aluminium, in many high-performance constructions. The double-lap, stepped, and scarf joint configurations are more typical joint arrangements. The findings of an experimental and numerical study for hybrid scarf joints between adherends constructed of aluminium and composite materials, accounting for varied scarf angle ( values, are presented in this research. The strength between various joint configurations is discussed using the peel (y) and shear stresses (xy) that were obtained by the numerical analysis using Finite Elements (FE). The joint strength was predicted using cohesive zone modelling (CZM), and the predictions were then confirmed by contrasting the outcomes with those from the experiments. Due to the fact that the behaviour of the joints was heavily dependent on CZM, CZM was confirmed for the design of hybrid scarf joints.

Author(s) Details:

D. L. Alves,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

R. D. F. Moreira,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V7/article/view/7923

Analytical Analysis of Tubular Adhesive Joints | Chapter 7 | Technological Innovation in Engineering Research Vol. 7

 Tubular adhesive connections, which are employed in trusses, pipes, and offshore structures, are similarly subject to the same fundamental notions of adhesive joint designs as apply to flat adherends. This study compares the tensile performance of three adhesives in aluminium tube joints (AW6082-T651) as a function of different overlap lengths (LO). The results of an analytical examination are compared with a numerical analysis using cohesive zone models (CZM) and the experimentally determined joint strength. The analytical investigation was conducted using two different analytical methodologies. The simpler and more direct formulation examined peel (y) and shear stresses (xy) before continuum mechanics criteria were used to assess the joint strength. The CZM results were the most precise, even if the analytical models showed some limits in comparison to the continuum mechanics-based criterion. The global yielding (GY) approach yields findings that are equal to those of the CZM approach, which offers the best approximation.

Author(s) Details:

A. E. S. Pinheiro,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

R. D. F. Moreira,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

I. J. Sánchez-Arce,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V7/article/view/7922

Advanced Numerical Techniques to Design T-bonded Joints | Chapter 5 | Technological Innovation in Engineering Research Vol. 4

Adhesive bonds have become more popular in industrial settings as a result of their numerous benefits over other, more conventional bonding techniques (fastened, welded and riveted joints). Over time, there have become more methods for predicting the strength of adhesive junctions. Although it is rarely researched in relation to bonded joints, the eXtended Finite Element Method (XFEM) is a modern variation of the (Finite Element Method) FEM to simulate damage development in structures. Three T-joints made of an aluminium alloy that have been adhered together are the subject of an experimental and XFEM analysis in this study. With values ranging from 1 to 4 mm, the thickness of the curved adherends (tP2) is examined parametrically. The ability of XFEM prediction was evaluated using various damage start and propagation criteria. It was shown that if the modelling conditions are properly specified, accurate numerical results may be obtained.

Author(s) Details:

F. J. P. Moreira,

Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,

Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V4/article/view/7310

Advanced Numerical Techniques for Strength Prediction of Adhesive Joints under Peel Loadings | Chapter 1 | Research Developments in Science and Technology Vol. 7

 Adhesive bonding is becoming more popular for structural applications due to benefits such as more uniform stress distributions and the ease with which diverse materials may be joined. There are many different types of joint architectures, but the most prevalent are single-lap joints (SLJ), double-lap joints, and scarf joints. T-joints are used in aeroplanes to attach stiffeners to the skin and in automobiles to connect the B-pillar and the rocker, although they are rarely examined in the literature. Different forecasting approaches for these joints are available in the literature, however some of them only operate for certain joint types. The performance of the structural adhesive Araldite® 2015 in an aluminium T-joint is quantitatively evaluated using cohesive zone modelling (CZM). Following CZM validation with experimental findings utilising a comparable geometry, this approach was able to be used in a later numerical research. The behaviour of several T-joint geometrical configurations when subjected to peel stresses is then captured using a solely CZM numerical analysis. A parametric research is included in the work, which involves stress analysis in the elastic loading stage and maximum load (Pm) prediction using four geometrical parameters: flat adherend thickness (a), T-element thickness (t), overlap length (l), and T-element radius (r). The examined factors had a substantial influence on Pm, and the CZM approach proved to be a precise method for investigating T joints with precision and accuracy.

Author(s) Details:

J. P. M. Lopes,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

R. J. B. Rocha,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

I. J. Sanchez-Arce,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/RDST-V7/article/view/7073

Analysis of Torsional Tubular Adhesive Joints using a Numerical Finite Element Approach | Chapter 5 | Research Aspects in Chemical and Materials Sciences Vol. 1

 Tubular bonded joints are frequently exposed to axial or torsional stresses. The weight reduction of the structure and ease of manufacturing are two advantages of this form of connecting over additional welding or mechanical joining. The torsional performance of three adhesives in aluminium tubular joints (AW6082-T651) is compared in this study, which takes into consideration the variation of essential geometric parameters such as overlap length (LO) and tube thickness. To anticipate strength, the Finite Element Method (FEM) was combined with Cohesive Zone Models (CZM). The investigation was based on the maximal torsional moment as a measure of joint strength (Mm). Validation with experimental data had already been completed. Experimental data was used to verify the approach, demonstrating CZM's capacity to represent tubular junctions. Except for LO, Mm showed a substantial geometrical impact. Tube yielding reduced joint strength as tube thickness increased.

Author(s) Details:

T. J. S. Oliveira,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

M. G. Cardoso,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/RACMS-V1/article/view/7083

Tensile Cohesive Laws of Adhesive Joints as a Function of the Adhesive Thickness | Chapter 14 | Technological Innovation in Engineering Research Vol. 3

Because bonded structures bear such a high level of responsibility, it is critical to accurately predict fracture behaviour under a variety of stresses. Numerical simulations, similar to Cohesive Zone Models (CZM), can be used for strength prediction. The influence of adhesive thickness (t_A) variation on the value of tensile fracture toughness (G_n^c) of a bonded joint is investigated numerically in this paper. The direct technique was also used to get the cohesive qualities and geometric dimensions that were incorporated as basic properties in the simulation software. The numerical effort entails reproducing the experimental data, namely the load-displacement (P-d) curves, in order to confirm the cohesive laws established for the various tested t_A. For this project, the triangular CZM was chosen, with 2D modelling in plane-strain conditions as the most suited condition for the geometry in issue. CZM guidelines for the Sikaforce® have been provided and proven as a consequence of this study for the design of bonded structures, substantially speeding up the procedure.

Author(s) Details:

R. P. R. O. Antunes,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V3/article/view/7072

Insight on the use of Cohesive Zone Models for Impact Strength Analysis of Adhesive Joints | Chapter 11 | Technological Innovation in Engineering Research Vol. 3

Adhesive bonding are becoming more popular as a substitute for technical applications. The growing popularity of this sort of joining necessitates the development of tools to aid in the design process. Cohesive zone models (CZM), which combine strength and toughness characteristics to forecast the performance of adhesive joints, are one of the most effective damage criteria or models linked with the Finite Element Method. Adhesive joints are subjected to impact loads in various practical circumstances, such as car wrecks. The main purpose of this study is to see how cohesive factors affect the strength of single-lap joints (SLJ) that are subjected to impact stresses. The impact of the cohesive properties was studied by changing each of these qualities while leaving the others constant. To investigate the influence of different adhesive qualities, the Araldite® AV138 (high stiffness) and Nagase Chemtex® XNR6852 E-2 (high toughness) adhesives were used. CZM correctly predicts joint impact strength, and CZM settings have a considerable influence on joint strength, according to the findings.

Author(s) Details:

D. M. S. R. B. Machado,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V3/article/view/7068

Evaluation of Adhesively-bonded Stiffeners by Numerical Modelling | Chapter 10 | Technological Innovation in Engineering Research Vol. 3

In every sector, large-scale application of a certain bonding method need precise instruments for failure design and prediction. This study looks at how well a structural adhesive (Araldite® 2015) performs on a T-stiffener with composite adherends comprised of an epoxy matrix reinforced with carbon fibres. The goal of this research is to use the Finite Element Method (FEM) and Cohesive Zone Models (CZM) to numerically investigate the behaviour of various T-stiffeners bonded with a structural epoxy adhesive when subjected to peel loads and various geometries. A parametric research was conducted, which included an elastic stress analysis and maximum load (Pm) prediction using CZM modelling, while taking into account the fluctuation of four geometrical parameters: flat adherend thickness (tP), stiffener thickness (tS), and stiffener thickness (tS) (t0), To acquire the best configuration, adjust the overlap length (LO) and the curved deltoid radius (R). The best joint parameters for T-stiffeners could be identified since all of the investigated factors had a significant influence on both stress distributions and Pm.

Author(s) Details:

J. A. M. Ferreira,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and  INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V3/article/view/7067