Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/46601
標題: Mode I stress intensity factor solutions for spot welds in lap-shear specimens
作者: Lin, P.C.
王東安
Wang, D.A.
Pan, J.
關鍵字: mode I stress intensity factor
J integral
fatigue
spot weld
lap-shear specimen
loading conditions
finite-element
kinked cracks
behavior
joints
plates
期刊/報告no:: International Journal of Solids and Structures, Volume 44, Issue 3-4, Page(s) 1013-1037.
摘要: The analytical solutions of the mode I stress intensity factor for spot welds in lap-shear specimens are investigated based on the classical Kirchhoff plate theory for linear elastic materials. First, closed-form solutions for an infinite plate containing a rigid inclusion under counter bending conditions are derived. The development of the closed-form solutions is then used as a guide to develop approximate closed-form solutions for a finite square plate containing a rigid inclusion under counter bending conditions. Based on the J integral, the closed-form solutions are used to develop the analytical solutions of the mode I stress intensity factor for spot welds in lap-shear specimens of large and finite sizes. The analytical solutions of the mode I stress intensity factor based on the solutions for infinite and finite square plates with an inclusion are compared with the results of the three-dimensional finite element computations of lap-shear specimens with various ratios of the specimen half width to the nugget radius. The results indicate that the mode I stress intensity factor solution based on the finite square plate model with an inclusion agrees well with the computational results for lap-shear specimens for the ratio of the half specimen width to the nugget radius between 4 and 15. Finally, a set of the closed-form stress intensity factor solutions for lap-shear specimens at the critical locations are proposed for future applications. (c) 2006 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/46601
ISSN: 0020-7683
文章連結: http://dx.doi.org/10.1016/j.ijsolstr.2006.05.031
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