Three-Dimensional Stress Concentration Factor in Finite Width Plates with a Circular Hole
三维应力集中系数有限宽板的圆孔作者机构：Coordenacao dos Programas de Pós-Graduacao de Engenharia Post-Graduate School of Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil
出 版 物：《World Journal of Mechanics》 (力学国际期刊（英文）)
年 卷 期：2013年第3卷第3期
页 面：153-159页
学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）]
基 金：the support of the National Council for Scientific and Technological Development(CNPq)for this work
主 题：Stress Concentration Factor Plates with Circular Hole Finite Element Analysis
摘 要：The three-dimensional stress concentration factor (SCF) at the edge of elliptical and circular holes in infinite plates under remote tension has been extensively investigated considering the variations of plate thickness, hole dimensions and material properties, such as the Poisson’s coefficient. This study employs three dimensional finite element modeling to numerically investigate the effect of plate width on the behavior of the SCF across the thickness of linear elastic isotropic plates with a through-the-thickness circular hole under remote tension. The problem is governed by two geometric non-dimensional parameters, i.e., the plate half-width to hole radius (W/r) and the plate thickness to hole radius (B/r) ratios. It is shown that for thin plates the value of the SCF is nearly constant throughout the thickness for any plate width. As the plate thickness increases, the point of maximum SCF shifts from the plate middle plane and approaches the free surface. When the ratio of plate half-width to hole radius (W/r) is greater than four, the maximum SCF was observed to approximate the theoretical value determined for infinite plates. When the plate width is reduced, the maximum SCF values significantly increase. A polynomial curve fitting was employed on the numerical results to generate empirical formulas for the maximum and surface SCFs as a function of W/r and B/r. These equations can be applied, with reasonable accuracy, to practical problems of structural strength and fatigue, for instance.
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