Influence of void coalescence by direct impingement on spall response of polycrystalline metal

Feng Guo Zhang*, Jian Li Shao, Pei Wang, Qi Jing Feng

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

It is well known that the spall response of ductile metal is sensitive to its initial microstructures. The present work is focused on the grain size effect and void coalescence during the damage evolution. According to the geometric relationship between voids derived from the porosity and voids size, a criterion for the onset of void coalescence was proposed. Then, we propose an extended damage formulation combining void coalescence by direct impingement, which can describe the increase of porosity rate in view of the reduction of void number and increase of void size after the void coalescence. Our simulations show that the pull-back velocity increases with grain size. Besides, the void coalescence will enhance the magnitude of the spall peak and the acceleration rate after the pull-back minimum. These numerical results are in qualitative agreement with the corresponding experiment data.

Original languageEnglish
Title of host publicationComputational Science and Its Applications - ICCSA 2017 - 17th International Conference, 2017
EditorsBeniamino Murgante, Bernady O. Apduhan, Giuseppe Borruso, Alfredo Cuzzocrea, Carmelo M. Torre, Osvaldo Gervasi, David Taniar, Elena Stankova, Ana Maria A.C. Rocha, Sanjay Misra
PublisherSpringer Verlag
Pages701-709
Number of pages9
ISBN (Print)9783319624068
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event17th International Conference on Computational Science and Its Applications, ICCSA 2017 - Trieste, Italy
Duration: 3 Jul 20176 Jul 2017

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume10409 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference17th International Conference on Computational Science and Its Applications, ICCSA 2017
Country/TerritoryItaly
CityTrieste
Period3/07/176/07/17

Keywords

  • Ductile metal
  • Grain size
  • Spall
  • Void coalescence

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