Structural Behaviour of CFRP-to-Steel Bonded Joints| Chapter 1 | Techniques and Innovation in Engineering Research Vol. 7

 The behaviour of the shackled joints betwixt carbon-texture-reinforced polymer (CFRP) composite strips and steel plates has happened analyzed in this place paper. For a better understanding of the structural reaction, single lap cheap hangouts (SLJs) have been used, being intoxicated in axial pressure. First, the behaviour has been examined experimentally, by fitting 34 specimens accompanying various types of composite strips, types of adhesvies and bonding thicknesses. Based on the results of the exploratory program, the failure systems were classified and the load-dislocation curves were plotted. The fundamental response has again been studied by resolving the strain distribution ahead the bond length at various load stages and by plotting the cut stress-displacement (slip) curves and the stress-strain distributions in the CFRP strips. For a better validation of the exploratory results, numerical simulations have existed done, established a 3D finite item method (FEM) reasoning. The results were considered consistent, being in good arrangement with the exploratory ones.

Author(s) Details:

Vlad Lupasteanu,
Faculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 43 Mangeron Blvd., 700050 Iasi, Romania.

Dragos Ungureanu,
Faculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 43 Mangeron Blvd., 700050 Iasi, Romania

Nicolae Taranu,
Faculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 43 Mangeron Blvd., 700050 Iasi, Romania and The Academy of Romanian Scientists, 54 Splaiul Independentei, Sector 5, 050094 Bucuresti, Romania.

Radu Lupasteanu,
Faculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 43 Mangeron Blvd., 700050 Iasi, Romania.

Please see the link here: https://stm.bookpi.org/TAIER-V7/article/view/9116

Evaluating Wear Performance of Silicon Nitride-Hexagonal Boron Nitride Composite Using Taguchi Method | Chapter 1 | Research Aspects in Chemical and Materials Sciences Vol. 2

The goal of bio-tribology research is to determine which biomaterials will wear the least. Recently, silicon nitride (Si3N4) has been suggested as a substitute material for hip and knee joint replacement. Hexagonal boron nitride can be used to improve Si3N4's wear characteristics (hBN).

Methods/Analysis: In order to reduce wear loss, this study evaluates the sliding wear behaviour of Si3N4-hBN composite against alumina and steel (ASTM 316L). The impact of hBN addition on Si3N4 wear performance was investigated. The trials were designed using the Design of Experiments (DoE) - orthogonal array Taguchi approach to assess the impact of the addition of hBN on the silicon nitride material's wear properties.

Findings: Taguchi analysis recommends 15N load and 8 percent volume of hBN against alumina and 15N load and 12 percent volume of hBN against steel to reduce Si3N4 wear loss. The relationship between load and hBN addition has a significant impact on silicon nitride's wear resistance.

 

Author (s) Details

Sachin Ghalme

Department of Mechanical Engineering, Sandip Institute of Technology and Research Centre, Nashik (MS), India.

 

View Book :-  https://stm.bookpi.org/RACMS-V2/article/view/7625

Deterioration of Hundred Years Old Coated Steel Bridges: Experimental Investigations | Chapter 11 | Research Aspects in Chemical and Materials Sciences Vol. 1

 Early in the nineteenth century, steel bridges were popular. To protect the buildings from consistent air degradation, lead-based coatings were used. These have proven excellent resistance to degradation over time. In general, the rivets that connected the structural components exhibited less corrosion than the steel pieces. The damage was concentrated in places directly affected by rainfall or water flux. Crater formation and exfoliation were only seen in a few places. Organic deposit enrichment enhanced humidity stability, which had a detrimental effect on steel conservation. In these conditions, the overall coating thickness decreased somewhat, and long-therm protection was no longer possible. Lead's content has a harmful environmental impact. As a result, during the removal and disposal of the pollution, restoration activities must take into consideration the contaminant's effect. The current study covers the primary deteriorating difficulties associated with historic steel bridges, which, on the whole, are still in pretty excellent condition.

Author(s) Details:

C. Paglia,
University of Applied Sciences of Southern Switzerland, DACD, 6850 Mendrisio, Switzerland.

S. Antonietti,
University of Applied Sciences of Southern Switzerland, DACD, 6850 Mendrisio, Switzerland.

C. Mosca,
University of Applied Sciences of Southern Switzerland, DACD, 6850 Mendrisio, Switzerland.

Please see the link here: https://stm.bookpi.org/RACMS-V1/article/view/7109

Effect of the Temperature and the Holding Time on Carburizing Treatment of 18CN4 and 22MC4 Steels | Chapter 03 | Recent Trends in Chemical and Material Sciences Vol. 5

 The resistance to wear and fatigue of mechanical parts subjected to high loads is heavily influenced by the surface of those parts. Producing a hard surface layer over a less strong substrate increases mechanical wear and fatigue resistance in the vast majority of circumstances. A good solution to the exposed problem is a hard layer of steel created by carburizing that bonded progressively to a martensitic area of high hardness and to a core steel of lower hardness and greater toughness. The higher concentration of carbon atoms in the interstitial sites of austenite before quenching accounts for the carburizing layer's high hardness. The existence of ferrite and pearlite components, which arise when the cooling rate after austenitization falls below the critical one, results in a decreased hardness of the core after quenching. The goal of this research was to use a pack carburizing process to create a cemented surface layer on low alloy steel. As parameters of the solid carburizing treatment, several steel grades, austenitization temperatures, and soaking periods were used. Carbon atoms from the cement powder diffuse toward the steel's surface during this treatment, forming iron carbide compounds. Various characterisation techniques were used to evaluate the effect of carburizing parameters on the pace of transformation, the thickness and morphology of carburizing layers, and the structure and hardness of the surface of steels produced by carburizing treatment.

Author(S) Details

Younès Benarioua
Mechanical Engineering Department, Faculty of Technology, University of M’sila Bordj Bou Arréridj Read, M'sila-28000, Algeria Emerging Materials Research Unit, University of Sétif 1, Sétif-19000, Algeria.

View Book:- https://stm.bookpi.org/RTCAMS-V5/article/view/5347

Bamboo Reinforced Panels for Fence Walls | Chapter 3 | Current Approaches in Science and Technology Research Vol. 11

 The building industry uses a lot of steel and emits a lot of carbon, which contributes to global warming and makes it difficult to grow sustainably all over the world. Bamboo has been used as a reinforcement material in a few nations (e.g., Indonesia, China, Malaysia, and India) but only on a small scale. When compared to traditional fence barriers created using materials such as stone, brick, or barbed wire, precast steel reinforced concrete (SRC) panels are currently in high demand due to time savings and simple craftsmanship. Due to increased demand, the preparation of SRC panels has become a cottage business. These panels, on the other hand, are made without regard for any specifications or norms. The goal of this project is to look at how bamboo may be used to build fence walls instead of steel. The M20 mix was used to make thirty (30) bamboo reinforced concrete (BRC) slabs with dimensions of 1000 mm x 300 mm x 50 mm (length: height: thickness). With a pretreatment of coal tar creosote, fifteen (15) slabs were cast with I bambusa balcooa and (ii) bambusa polymorpha species as reinforcement. The slabs were tested with an ultrasonic instrument to determine the quality of the concrete and a universal testing equipment to determine the load versus deflection characteristics. These tests were replicated on precast SRC panels obtained from a local manufacturing unit as a comparison study. The test findings show that the concrete quality in BRC slabs is superior to that of SRC slabs. The load taken by BRC slabs with any kind of species at failure was approximately half that of SRC slabs at failure. The deflection, as well as the fracture width connected with it, followed the same pattern. In compared to SRC panels, BRC slabs are 30 to 35 percent less expensive, according to the cost analysis. As a result, it is advised that BRC slabs be used to construct fence walls and barns, resulting in benefits such as environmental sustainability, increased bamboo species cultivation, and increased rural employment.

Author (S) Details

S. Suppiah
Department of Civil Engineering, Periyar Maniammai Institute of Science and Technology Periyar Nagar, Vallam, Thanjavur – 613 403. Tamil Nadu, India.

View Book :- https://stm.bookpi.org/CASTR-V11/article/view/2452