Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/46599
標題: Geometric functions of stress intensity factor solutions for spot welds in lap-shear specimens
作者: Wang, D.A.
王東安
Lin, P.C.
Pan, J.
關鍵字: spot weld
lap-shear specimen
mixed mode
stress intensity factor
geometric functions
fracture
fatigue
fatigue life prediction
behavior
plates
期刊/報告no:: International Journal of Solids and Structures, Volume 42, Issue 24-25, Page(s) 6299-6318.
摘要: In this paper, the stress intensity factor solutions for spot welds in lap-shear specimens are investigated by finite element analyses. Three-dimensional finite element models are developed for lap-shear specimens to obtain accurate stress intensity factor solutions. In contrast to the existing investigations of the stress intensity factor solutions based on the finite element analyses, various ratios of the sheet thickness, the half specimen width, the overlap length, and the specimen length to the nugget radius are considered in this investigation. The computational results confirm the functional dependence on the nugget radius and sheet thickness of the stress intensity factor solutions of [Zhang, S., 1997. Stress intensities at spot welds. International Journal of Fracture 88, 167-185; Zhang, S., 1999. Approximate stress intensity factors and notch stresses for common spot-welded specimens. Welding Journal 78, 173s-179s]. The computational results provide some geometric functions in terms of the normalized specimen width, the normalized overlap length, and the normalized specimen length to the stress intensity factor solutions of [Zhang, S., 1997. Stress intensities at spot welds. International Journal of Fracture 88, 167-185; Zhang, S., 1999. Approximate stress intensity factors and notch stresses for common spot-welded specimens. Welding Journal 78, 173s-179s] for lap-shear specimens. The computational results also indicate that when the spacing between spot welds decreases, the mode I stress intensity factor solution at the critical locations increases and the mode mixture of the stress intensity factors changes consequently. Finally, based on the analytical and computational results, the dimensions of lap-shear specimens and the corresponding approximate stress intensity factor solutions are suggested. (c) 2005 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/46599
ISSN: 0020-7683
文章連結: http://dx.doi.org/10.1016/j.ijsolstr.2005.05.037
Appears in Collections:精密工程研究所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.