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Rapid evaluation of notch stress intensity factors using the peak stress method: Comparison of commercial finite element codes for a range of mesh patterns

机译:利用峰值应力法快速评估凹口应力强度因子:商业有限元代码对一系列网格图案的比较

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摘要

The peak stress method (PSM) is an engineering, finite element (FE)�]oriented method to rapidly estimate the notch stress intensity factors by using the singular linear elastic peak stresses calculated from coarse FE analyses. The average element size adopted to generate the mesh pattern can be chosen arbitrarily within a given range. Originally, the PSM has been calibrated under pure mode I and pure mode II loadings by means of Ansys FE software. In the present contribution, a round robin between 10 Italian universities has been carried out to calibrate the PSM with 7 different commercial FE codes. To this aim, several two�dimensional mode I and mode II problems have been analysed independently by the participants. The obtained results have been used to calibrate the PSM for given stress analysis conditions in (i) FE software, (ii) element type and element formulation, (iii) mesh pattern, and (iv) criteria for stress extrapolation and principal stress analysis at FE nodes.
机译:峰值应力法(PSM)是通过使用从粗Fe分析计算的奇异线性弹性峰值应力来快速估计凹口应力强度因子的有针对性的方法的工程,有限元(Fe)�]的方法。用于生成网格图案的平均元素大小可以在给定范围内任意选择。最初,PSM通过ANSYS FE软件在纯模式I和纯模式II负载下校准。在目前的贡献中,已经开展了10所大学的循环罗宾,以校准PSM,具有7种不同的商业费用代码。为此目的,参与者独立地分析了几种两个二维模式I和模式II问题。所得结果已被用于校准(I)Fe软件,(ii)元素类型和元素配方,(iii)网格图案,(iv)的应力外推和主应力分析的标准fe节点。

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