Evaluation of the Peel Strength of Adhesives by the Floating Roller Peel Test | Chapter 7 | Contemporary Perspective on Science, Technology and Research Vol. 3

 The peel substance of adhesives maybe obtained through the standardized Buoyant Roller Peel Test (FRPT). In another way, computational models of adhesive joints support insight into the behaviour of these junctures under load, providing information for subsequent planning design. Despite the significance of the FRPT, little numerical modelling concerning this was found in the composition. In this work, a methodology to model the FRPT was grown and validated accompanying experimental data. The projected numerical model engages the finite element form (FEM) and cohesive district modelling (CZM) and accurately shows the ASTM D3167 standard, including the interplays with the experimental maneuver following a two-dimensional approach. In addition, an explicit solver was employed, and concerning manipulation of numbers non-linearities were considered. As a record of what happened, the adhesive Araldite® 2015 was experimentally proven and then displayed. The evolution of peel strength as the test progresses shows a corresponding behaviour in both mathematical and experimental data. In spite of this, the numerical model shows various similarities with the tangible test throughout the imitation, indicating that the model accurately shows the phenomenon. Accordingly, it is suitable for further research on adhesive junctures subjected to peel loads.

Author(s) Details:

J. B. S. Nóbrega,
ISEP, Departamento de Engenharia Mecânica, Instituto Politécnico de Porto, Rua Dr. Bernardino de Almeida 431, 4200-072, Porto, Portugal.

R. D. S. G. Campilho,
ISEP, Departamento de Engenharia Mecânica, Instituto Politécnico de Porto, Rua Dr. Bernardino de Almeida 431, 4200-072, Porto, Portugal and LAETA-INEGI, Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465, Porto, Portugal.

Please see the link here: https://stm.bookpi.org/CPSTR-V3/article/view/12919

Modelling of Bonded Tubular Scarf Joints by the Cohesive Zone Approach | Chapter 13 | Research Highlights in Science and Technology Vol. 3

 Tubular sticking connections are mainly subjected to in the middle or torsional loads. Under axial loads, tubular lap joints (TLJ) bring about peak stresses in the adhesive similarly to single-lap cheap hangouts. An alternative to mitigate peak stresses search out consider a tubular kerchief joint (TSJ). This joint enables joining tubes accompanying identical diameters, and the chamfer arithmetic provides a abundant bonding district, if the scarf angle (a) is adequately small. The proposed work is chiefly numerical, and it addresses the pliable behaviour of TSJ between aluminium alloy adherends, and a 'tween 45° and 3.43°, considering various adhesive types. Initial confirmation of the cohesive zone model (CZM) is gifted by comparing exploratory and numerical dossier of TLJ. The numerical CZM study that trails addresses the failure way and maximum load (Pm), as a function of a and the adhesive type. The CZM was successfully endorsed, and clear guidelines were establish regarding highest in rank a and adhesive mergers.

Author(s) Details:

J. E. S. M. 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/RHST-V3/article/view/10764

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

Cohesive Zone Model Estimation of the Tensile Behaviour of Adhesive Joints | Chapter 01 | Techniques and Innovation in Engineering Research Vol. 3

 The bond model (CZM) is often used in numerical methods for damage simulation of adhesive joints based on fracture mechanics. There are three main methods available for deriving CZM laws: property discriminant method, inverse method, and direct method. This study evaluated the tensile fracture toughness (GIC) and CZM law of adhesive joints of two different adhesives. A DCB (Double Cantilever Beam) test was used. Experimental efforts included characterizing the tensile failure properties of two structural adhesives using the J-integral approach.To measure the tensile relative displacement (dn) of the adhesive layer at the fracture tip, a computerised image correlation approach was used.  FE simulations were performed to analyze the accuracy of the triangular, trapezoidal and linear exponential CZM laws in predicting the experimental behavior of the DCB test. This paper provides information on the applicability of these CZM rules to all types of adhesives, enabling subsequent strength prediction of adhesive joints.

Author(s) Details:

R. L. Fernandes,
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,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TAIER-V3/article/view/8422

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

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

Geometry Effect on the Tensile Behaviour of Adhesively-Bonded Tubular Scarf Joints| Chapter 10 | Current Overview on Science and Technology Research Vol. 2

 Cylindrical cement joints are generally utilized while joining cylinders and poles. To work on the joint strength in the hub course, the cross-segment of the cylinders can be chamfered to deliver a scarf cylindrical joint. This study intends to analyze the tractable presentation of cylindrical scarf joints (TSJ) with aluminum (AW6082-T651) adherends, taking into account the variety of the scarf point () from 45° to 3.43°. Right off the bat, through the correlation of exploratory tests and mathematical investigation of cylindrical lap joints (TLJ), the strong zone model (CZM) strategy and particular durable boundaries were approved. A CZM examination was then performed on the TSJ to dissect strip (σy) and shear stresses (τxy) in the cement layer. Examination of the dispersed energy as well as investigations of harm and joint strength were performed. The mathematical investigation uncovered a tremendous impact, profiting from more modest and preferable pressure disseminations over TLJ.

Author(s) Details:

J. E. S. M. 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.

I. J. Sánchez-Arce,
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/COSTR-V2/article/view/7996

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

Use of Advanced Numerical Methods for the Strength Prediction of Peel-dominated Bonded Joints| Chapter 14 | New Trends in Physical Science Research Vol.3

The use of adhesive bonding on composite structures necessitates the use of trustworthy design tools to precisely analyse the behaviour of the joints. The eXtended Finite Element Approach (XFEM) is a novel method for forecasting the fracture behaviour of joined' joints in this context. The purpose of this study is to use XFEM to analyse single-L adhesive connections between aluminium components and carbon-epoxy composites under peeling loads, while accounting for differences in the thickness of the L-shaped adherend (tP2) and adhesives of various ductility. The XFEM analysis employed stress or strain criteria for damage initiation, as well as numerous damage law types for fracture propagation. The results were validated by experimentation. Using the stress-based quadratic initiation criterion and the triangle propagation law, the XFEM analysis demonstrated that this approach is quite accurate.

Author(s) Details:

J. T. S. Xara,
Departamento de Engenharia Mecanica, Instituto Superior de Engenharia do Porto, Instituto Politecnico do Porto, Rua Dr. Antonio Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

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

Please see the link here: https://stm.bookpi.org/NTPSR-V3/article/view/6833