A modified analytical model for stress analysis of adhesively bonded stepped-lap joints under tensile load

2019 ◽  
Vol 77 ◽  
pp. 103794
Author(s):  
Suian Wang ◽  
Zonghong Xie ◽  
Xiang Li
Keyword(s):  
Stress Analysis ◽  
Analytical Model ◽  
Tensile Load ◽  
Lap Joints ◽  
Adhesively Bonded

A critical assessment of design tools for stress analysis of adhesively bonded double lap joints

2019 ◽  
pp. 1-21 ◽  
Author(s):  
Scott E. Stapleton ◽  
Bertram Stier ◽  
Stephen Jones ◽  
Andrew Bergan ◽  
Ibrahim Kaleel ◽  
...  
Keyword(s):  
Stress Analysis ◽  
Lap Joints ◽  
Critical Assessment ◽  
Design Tools ◽  
Adhesively Bonded

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.

Stress Analysis of Adhesively Bonded Lap Joints of Hollow Shafts Subjected to Torsional Moments

2000 ◽  
Author(s):  
Yuichi Nakano ◽  
Yukihisa Takagi ◽  
Toshiyuki Sawa
Keyword(s):  
Stress Analysis ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Dissimilar Materials ◽  
Theory Of Elasticity ◽  
Lap Joints ◽  
Experimental Result ◽  
Adhesively Bonded ◽  
Three Body ◽  
Hollow Shafts

Abstract The stress and strain distributions in adhesively bonded lap joints of hollow shafts with dissimilar materials subjected to torsional moments are examined using an axisymmetric theory of elasticity. In the analysis, the joint is modelled as an elastic three-body contact problem, and the hollow shafts, and the adhesive are respectively replaced by finite hollow cylinders. In the numerical calculations, the effects of the ratio of Young’s modulus of the adhesive to that of the shaft, the overlap length, and the thickness of the adhesive on the stress distributions at the interfaces in the joint are clarified. It is shown that the shear stress becomes singular at the ends of the interfaces between the shafts, and the adhesive, and increases near the ends of the interfaces with a decrease of Young’s modulus of the shaft, and of the thickness of the adhesive. For verification of the stress analysis, the strain distribution at an outer surface of an adhesively bonded lap joint was measured and a fairly good agreement was shown by comparing the experimental result with the analytical one.

Study on Tensile Strength of Composite Double-Lap Joint

2012 ◽  
Vol 157-158 ◽  
pp. 1519-1526 ◽  
Author(s):  
Sui Liu ◽  
Zhi Dong Guan ◽  
Xia Guo ◽  
Dong Xiu Yan ◽  
Ping Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Shear Strain ◽  
Analytical Model ◽  
Shear Failure ◽  
Tensile Load ◽  
Lap Joints ◽  
Plastic Behavior ◽  
Finite Model ◽  
Lap Joint ◽  
Maximum Shear Strain

An experimental and analytical study on ultimate tensile strength of composite double-lap joints with different adhesive thicknesses is employed in the paper，test results indicate the major failure mode of joints is adhesive shear failure and the ultimate strength of joints increasing with thicker adhesive. Analytical model is developed to investigate the adhesive failure of double-lap joint based on the experiments. The model takes into account anisotropy of each ply in the composite laminates and elastic-perfectly plastic behavior of the adhesive in the joints. The validity of analytical model for calculating shear strain/stress distribution is certified by comparing with finite model results. Maximum shear strain criterion is adopted in the analytical model to predict the ultimate tensile load of double-lap joint. Good agreement of the analytical predictions with the experimental results is obtained.

Fatigue Life Estimation of Adhesively Bonded Lap Joints

1988 ◽  
Vol 110 (4) ◽  
pp. 350-354 ◽  
Author(s):  
Makato Imanaka ◽  
Yusuke Fukuchi ◽  
Waichiro Kishimoto ◽  
Kozo Okita ◽  
Hideaki Nakayama ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Load Condition ◽  
Tensile Load ◽  
Adhesive Layer ◽  
Maximum Tensile Stress ◽  
Lap Joints ◽  
Thin Wall ◽  
Adhesively Bonded ◽  
Butt Joints

This paper describes a method of estimating the fatigue life of adhesively bonded lap joints on the basis of the stress analysis in adhesive layer with finite element method. First, cyclic tensile fatigue tests were conducted for adhesively bonded lap joints with different lap length and adhesive layer thickness. The results were evaluated from the viewpoint of the maximum values of both tensile and shear stress obtained numerically, instead of the apparent stress. Then these standardized fatigue strength were compared with those of adhesively bonded butt joints of a thin wall tube under cyclic tensile and fully reversed torsional load conditions. The results indicate that fatigue strength of lap joints evaluated from the maximum tensile stress of the adhesive layer agrees well with the fatigue strength of adhesively bonded butt joints of thin wall tube under cyclic tensile load condition. It is confirmed that fatigue strength of lap joints can be estimated adequately based on the fatigue strength of the butt joint of thin wall tube and the numerical results for the stress state of adhesive layer.

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