Ductile fracture simulation considering strain rate loading effect

Hyun Suk Nam, Ji Soo Kim, Yun-Jae Kim, Jin Weon Kim, Chang Young Oh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper is based on a ductile failure simulation under dynamic loading conditions using finite element (FE) analyses. Recently a simple finite element method in a quasi-static test has been proposed to implement fracture simulation based on the well-known stress modified fracture strain model. The stressmodified fracture strain model is determined to be incremental damage in terms of stress triaxiality and fracture strain for dimple fracture from tensile test result with FE analyses technique. Since dynamic loading effect is especially important to assess pipe with crack-like defect, this work propose the integrated model which combines quasi-static with dynamic loading effect. In order to validate stress-modified fracture strain model in dynamic loading conditions, this paper compares results of FE analysis using proposed method with strain dependent smooth bar tests and notch tensile tests using Johnson-Cook equation. In conclusion, the stress-modified fracture strain model criterion can be calibrated by FE analyses with strain rate dependent fracture toughness test results.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume6A-2015
ISBN (Electronic)9780791856994, 9780791856994, 9780791856994, 9780791856994
DOIs
Publication statusPublished - 2015
EventASME 2015 Pressure Vessels and Piping Conference, PVP 2015 - Boston, United States
Duration: 2015 Jul 192015 Jul 23

Other

OtherASME 2015 Pressure Vessels and Piping Conference, PVP 2015
CountryUnited States
CityBoston
Period15/7/1915/7/23

ASJC Scopus subject areas

  • Mechanical Engineering

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  • Cite this

    Nam, H. S., Kim, J. S., Kim, Y-J., Kim, J. W., & Oh, C. Y. (2015). Ductile fracture simulation considering strain rate loading effect. In Materials and Fabrication (Vol. 6A-2015). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP201545204