Development of finite element ductile tearing simulation model considering strain rate effect

Hyun Suk Nam, Ji Soo Kim, Jin Weon Kim, Yun Jae Kim

Research output: Contribution to journalArticle

Abstract

This paper proposes ductile failure simulation under high strain rate conditions using finite element (FE) analyses. In order to simulate a cracked component under a high strain rate condition, this paper applies the stressmodified fracture strain model combined with the Johnson/Cook model. The stress-modified fracture strain model determines the incremental damage in terms of stress triaxiality (σm/σe) and fracture strain (ϵf) for a dimple fracture using the tensile test results. To validate the stress-modified fracture strain model under dynamic loading conditions, the parameters are calibrated using the tensile test results under various strain rates and the fracture toughness test results under quasi-static conditions. The calibrated damage model predicts the CT test results under a high strain rate. The simulated results were then compared with the experimental data.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume40
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1
Externally publishedYes

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Strain rate
Fracture toughness

Keywords

  • Damage simulation
  • Ductile fracture
  • Finite element analysis
  • High strain rate condition

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Development of finite element ductile tearing simulation model considering strain rate effect. / Nam, Hyun Suk; Kim, Ji Soo; Kim, Jin Weon; Kim, Yun Jae.

In: Transactions of the Korean Society of Mechanical Engineers, A, Vol. 40, No. 2, 01.02.2016, p. 167-173.

Research output: Contribution to journalArticle

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