Semi-analytical study of interfacial stresses in adhesively bonded single lap joints subject to transverse shock loading

2013 ◽  
Vol 134 (5) ◽  
pp. 4197-4197
Author(s):  
Ebuka Nwankwo ◽  
Arash Soleiman-Fallah ◽  
Luke A. Louca
Keyword(s):  
Analytical Study ◽  
Shock Loading ◽  
Lap Joints ◽  
Adhesively Bonded ◽  
Interfacial Stresses ◽  
Single Lap Joints

scholarly journals Stress-Function Variational Method for Accurate Free-Edge Interfacial Stress Analysis of Adhesively Bonded Single-Lap Joints and Single-Sided Joints

2021 ◽  
Vol 5 (8) ◽  
pp. 197
Author(s):  
Xiang-Fa Wu ◽  
Youhao Zhao ◽  
Oksana Zholobko
Keyword(s):  
Variational Method ◽  
Stress Analysis ◽  
Stress Function ◽  
Free Edge ◽  
Lap Joints ◽  
Interfacial Stress ◽  
Strength Analysis ◽  
Adhesively Bonded ◽  
Interfacial Stresses ◽  
Single Lap Joints

Large free-edge interfacial stresses induced in adhesively bonded joints (ABJs) are responsible for the commonly observed debonding failure in ABJs. Accurate and efficient stress analysis of ABJs is important to the design, structural optimization, and failure analysis of ABJs subjected to external mechanical and thermomechanical loads. This paper generalizes the high-efficiency semi-analytic stress-function variational methods developed by the authors for accurate free-edge interfacial stress analysis of ABJs of various geometrical configurations. Numerical results of the interfacial stresses of two types of common ABJs, i.e., adhesively bonded single-lap joints and adhesively single-sided joints, are demonstrated by using the present method, which are further validated by finite element analysis (FEA). The numerical procedure formulated in this study indicates that the present semi-analytic stress-function variational method can be conveniently implemented for accurate free-edge interfacial stress analysis of various type of ABJs by only slightly modifying the force boundary conditions. This method is applicable for strength analysis and structural design of broad ABJs made of multi-materials such as composite laminates, smart materials, etc.

The impact of graphene nanoparticle additives on the strength of simple and hybrid adhesively bonded joints

2018 ◽  
Vol 53 (23) ◽  
pp. 3335-3346 ◽  
Author(s):  
Hamid Reza Borghei ◽  
Bashir Behjat ◽  
Mojtaba Yazdani
Keyword(s):  
Joint Strength ◽  
Tensile Tests ◽  
Lap Joints ◽  
Homogeneous Distribution ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Single Lap Joints ◽  
Hybrid Joints ◽  
Graphene Nanoparticles ◽  
The Impact

In this paper, the effect of graphene nanoparticle additive on the strength of simple and hybrid (rivet-bonded) single-lap joints is studied using the experimental method. Two different types of graphene with different number of layer and thicknesses are used in adhesive-graphene nanoparticle composite construction. At first, tensile tests are done on bulk specimens of adhesive with different additives. It is found that adding 0.5 wt% of graphene to the neat adhesive leads to an increase in the ultimate tensile strength of bulk specimens almost 24% and 12% for two graphene types compared to the neat adhesive. Also, the shear strength of adhesive and hybrid lap joints incorporating two types of graphene nanoparticles (types I and II) is compared to that of adhesive and hybrid joints without graphene nanoparticles. SEM results of fracture surfaces show that the inclusion of graphene nanoparticle to the adhesive increases the roughness of surfaces. Experimental results reveal that graphene nanoparticle increases the strength of bonded and hybrid joints. It is observed that, graphene with a lower thickness and number of layers has a better influence on joint strength. In fact, graphene nanoparticle type II makes a homogeneous distribution in adhesive-graphene nanoparticle composite and causes a significant increase on joint strength.

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