Structural stress distributions near nearly rigid, dissimilar and similar spot joints in lap-shear specimens are investigated by 3-D finite element analyses. A set of accurate closed-form structural stress solutions is first presented. The closed-form structural stress solutions were derived for a rigid inclusion in a square thin plate under various loading conditions with the weak boundary conditions along outer edges or semi-circular paths by satisfying the equilibrium conditions. Finite element analyses with different joint material behaviors, element types and mesh designs are conducted to examine the structural stress solutions near the spot joints in lap-shear specimens. The results of the finite element analyses indicate that the computational structural stress solutions on the edge of the joint depend on the joint material behavior, element type, and mesh design. However, the solutions do not significantly depend on the joint material behavior, element type, and mesh design at the radius distance of one and a half joint radius away from the joint where fatigue failures of mechanical joints, such as flow drill screw and self-piercing rivet joints, may occur.
Finite Element Analyses of Structural Stresses near Dissimilar Spot Joints in Lap-Shear Specimens
Sae Int. J. Adv. and Curr. Prac. in Mobility
WCX SAE World Congress Experience ; 2019
Sae International Journal of Advances and Current Practices in Mobility ; 1 , 4 ; 1535-1543
2019-04-02
9 pages
Conference paper
English
Finite Element Analyses of Structural Stresses near Dissimilar Spot Joints in Lap-Shear Specimens
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