FEM Stress Analysis and Strength Prediction of Stepped-Lap Adhesive Joints of Similar Hollow Cylinders Under Static Tensile Loadings

2011 ◽  
Author(s):  
Kazunari Kotajima ◽  
Yasuhisa Sekiguchi ◽  
Takashi Kobayashi ◽  
Yuta Ueda ◽  
Toshiyuki Sawa
Keyword(s):  
Stress Analysis ◽  
Young’S Modulus ◽  
Joint Strength ◽  
Adhesive Joints ◽  
Interface Stress ◽  
Strength Prediction ◽  
Modulus Ratio ◽  
Singular Stress ◽  
Static Tensile ◽  
Hollow Cylinders

This paper deals with an FEM stress analysis of stepped-lap adhesive joints of similar hollow cylinders under static tensile loadings. The effects of Young’s modulus ratio between the adherends and adhesive, the thickness of the adhesive, scarf angle, the number of steps, and singular stress on the interface stress distributions are calculated using FEM. The code of FEM employed is ANSYS. The singular stress is found to occur at the edge of the interfaces. The singular stress at the inside edge is larger than that at the outside edge. It is shown that the maximum principal stress at the edge of the interface decreases as Young’s modulus ratio between the adherend and the adhesive and the adhesive thickness decreases while it decreases as the number of steps increases. Using the obtained interface stress distribution, we can predict the joint strength. For verification of the strength prediction, experiments to measure the joint strength were carried out. The numerical results of the joint strength are in a fairly good agreement with the experimental results.

scholarly journals 3-D FEM Stress Analysis and Strength Prediction of Band Scarf Adhesive Joints Subjected to Static Tensile Loadings

2013 ◽  
Vol 49 (8) ◽  
pp. 282-292
Author(s):  
Hiroko NAKANO ◽  
Yuya OMIYA ◽  
Yasuhisa SEKIGUCHI ◽  
Toshiyuki SAWA ◽  
Bunkan PAKU
Keyword(s):  
Stress Analysis ◽  
Adhesive Joints ◽  
Strength Prediction ◽  
Static Tensile

Axisymmetric Stress Analysis and Strength Evaluation of Bonded Shrink Fitted Joints of Circular Pipes Subjected to Internal Pressure and Tensile Loads

2000 ◽  
Author(s):  
Masahide Katsuo ◽  
Toshiyuki Sawa ◽  
Masahiro Yoneno
Keyword(s):  
Internal Pressure ◽  
Stress Analysis ◽  
Joint Strength ◽  
Tensile Load ◽  
Theory Of Elasticity ◽  
Shear Stresses ◽  
Stress Distributions ◽  
Strength Evaluation ◽  
Circular Pipes ◽  
Hollow Cylinders

Abstract This study deals with the stress analysis and the strength evaluation of a bonded shrink fitted joint of circular pipes subjected to an internal pressure and a tensile load. In the analysis, two pipes and the adhesive are replaced with finite hollow cylinders, and the stress distributions in the joint are analyzed by using the axisymmetric theory of elasticity. From the numerical calculations, the following results are obtained: (1) Both the compressive and shear stresses at the interface between the adherend and the adhesive increase as Young’s modulus of the adherend increases. (2) The stress becomes singular at the edges of the interfaces. (3) The joint strength can be evaluated using the compressive and shear stresses near the edge of the interface. In the experiments, bonded shrink fitted joints consisting of dissimilar circular pipes were manufactured, and rupture tests of the joints were carried out by applying an internal pressure, and a tensile load to the joints. From the results, the joint strength of the bonded shrink fitted joint was found to be greater than that of the shrink fitted joint. Furthermore, the numerical results are in fairly good agreement with the experimental ones.

A Stress Analysis and Strength Evaluation of Scarf Adhesive Joints Subjected to Static Tensile Loading

2006 ◽  
Author(s):  
Toshiyuki Sawa ◽  
Masahiro Sasaki ◽  
Yuya Hirayama
Keyword(s):  
Joint Strength ◽  
Three Dimensional ◽  
Maximum Principal Stress ◽  
Adhesive Joints ◽  
Stress Distributions ◽  
Principal Stresses ◽  
Adhesive Properties ◽  
Maximum Value ◽  
Static Tensile ◽  
Three Dimensional Finite Element

Scarf adhesive joints used in practice. However, the stress distributions and the joints strengths have not yet been fully elucidate. Important issues are how to determine the scarf angle in adherend and how to determine the adhesive properties. In this study, the stress distributions in scarf adhesive joints under static tensile loadings are analyzed using three-dimensional finite-element calculations. In the FEM calculations, the effects of Young's modulus of the adhesive, adhesive thickness, scarf angle of the adherend on the stress distributions at the adhesive interfaces are examined. The maximum principal stresses were calculated at every element at the interfaces. As the results, it is found that the maximum value of the maximum principal stress occurs at the edge of the adhesive interfaces (z=0, 1/s=1). It is also observed that the maximum value of the stress is the smallest, when the scarf angle is 60 degree. In addition, the joint strength is estimated using the interface stress. For the verification of the FEM calculations, the experiments were carried out to measure the strengths and the strains in the joints under static tensile loadings using strain gauges. Fairly good agreements are observed between the numerical and the measured results concerning the joint strength and the strains.

553 FEM Stress Analysis of Butt Adhesive Joints with Fillers under Static Tensile Loadings

2004 ◽  
Vol 2004 (0) ◽  
pp. 147-148
Author(s):  
Kohei ICHIKAWA ◽  
Toshiyuki SAWA ◽  
Katsuhiro TEMMA ◽  
Izumi HIGUCHI
Keyword(s):  
Stress Analysis ◽  
Adhesive Joints ◽  
Static Tensile
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