Research of stress assessment for the 135-degree sheet corner based on singularity strength theory

Gao, Song S. and Xu, Li L. and Wang, Dazheng D. and Barltrop, Nigel D P N.D.P. (2013) Research of stress assessment for the 135-degree sheet corner based on singularity strength theory. Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology, 35 (12). pp. 72-79. ISSN 1671-4431

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Abstract

This paper will research the singularity strength theory to stress distribution of a 135-degree sheet corner which bases on notch stress intensity factor (N-SIF) theory. The N-SIF formula is simplified through singularity strength 'as' which is related to structure size. Numerical simulations by ANSYS and regression analysis by MathCAD are done for a number of cases. Finally a simple assessment algorithms and the empirical formula for the notch stress are proposed and verified. The results can be used for structural strength and fatigue analysis.