A Strain Rate Dependent Computational Model of Ductile Damage for C(T) Specimen

H. S. Nam, J. Y. Jeon, J. S. Kim, J. W. Kim, Y. J. Kim

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

This paper is based on a ductile failure simulation under dynamic loading conditions using finite element (FE) analyses. This paper proposed to implement fracture simulation based on the energy based numerical ductile fracture model. The energy based numerical ductile fracture model is determined to be incremental damage in terms of stress triaxiality (σme) and fracture strain energy (Wf) for dimple fracture from tensile test result with FE analyses technique. Since dynamic loading effect is especially important to assess crack-like defect components, this work propose the integrated model which combines quasi-static with dynamic loading effect. In order to validate energy based numerical ductile fracture model in dynamic loading conditions, this paper compares FE results with test results. The tensile properties for SA 508 Gr. 1a carbon steel were examined over a wide range of strain rates. Five different strain rate tensile test results are fitted by Johnson-Cook model. Also, two types of notch tensile tests were examined under four different strain rates. The energy based numerical ductile fracture model criterion was calibrated by FE analyses with strain rate dependent tensile and notch test results. The calibrated damage model predicts CT test result. Simulated results agree well with experimental data.

本文言語English
ページ(範囲)861-867
ページ数7
ジャーナルProcedia Engineering
130
DOI
出版ステータスPublished - 2015
外部発表はい
イベント14th International Conference on Pressure Vessel Technology, 2015 - Shanghai, China
継続期間: 2015 9月 232015 9月 26

ASJC Scopus subject areas

  • 建築および建設
  • 工学一般

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