S-version finite element strategy for accurately evaluating local stress in the vicinity of dynamically propagating crack front in 3D solid

Shibanuma, Kazuki; Kishi, Kota; He, Tianyu; Morita, Naoki; Mitsume, Naoto; Fukui, Tsutomu

doi:10.1016/j.cma.2022.115374

Cited by 5 publications

(1 citation statement)

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“…Wada et al (2014) analyzed the growth of internal cracks using the s-version FEM. Kishi et al (2020) and Shibanuma et al (2022) proposed efficient strategies based on the s-version FEM for analyzing dynamic crack propagation problems. Furthermore, one can find another application of the discontinuity-related FEMs in the literature, namely, the parametric analysis for local shapes.…”

Section: Introductionmentioning

confidence: 99%

Parallel parametric analysis approach based on an s-version FEM for fracture mechanics analysis in designing hole positions

Suwa

Yusa

Kuboki

2023

Mechanical Engineering Journal

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This study proposes a parallel parametric analysis approach, in which parametric analysis for a local shape, such as a hole, is automated and parallelized. For the automation, the present approach is based on an s-version FEM, namely, the coupling-matrix-free iterative s-version FEM. In this method, the hole can be detached from the mesh of the global structure. This feature overcomes a difficulty in generating a mesh with a hole, particularly together with a crack for fracture mechanics analysis. Moreover, the parallelization is implemented by Message Passing Interface (MPI). In the present approach, a large number of analyses for different hole positions are performed in parallel. In each analysis, the hole position is changed using the s-version FEM. Then, this approach was applied to numerical examples of stationary crack problems, namely, a plate with an edge crack and a V-bending die with a circular surface crack. Both examples had a hole, the position of which was the parameter of the parametric analysis. In each numerical example, changes in stress intensity factor of the crack for different hole positions were investigated. It was numerically demonstrated that some hole positions decreased the stress intensity factor of the crack. Moreover, our approach achieved high speedup and parallel efficiency in a strong scaling test.

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Section: Introductionmentioning

confidence: 99%