A new model for upper shelf impact toughness assessment with a computationally efficient parameter identification algorithm

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Denis Novokshanov
  • Benedikt Döbereiner
  • Mohamed Sharaf
  • Sebastian Münstermann
  • Junhe Lian

Research units

  • RWTH Aachen University

Abstract

The modified Bai-Wierzbicki model allows for precise prediction of ductile fracture failure. For the upper shelf impact toughness assessment of pipeline steels through Battelle drop weight tear test, the model was extended to include strain rate and temperature effects. Through combined experimental and numerical approaches the parameters were adjusted to express the influence of strain rate and temperature on strain hardening. The results from VUMAT implementation of the model agree well with experimental results of pipeline steel x70.To reduce the material parameter calibration effort, an UMAT implementation of the material model was used (in addition to the VUMAT implementation).

Details

Original languageEnglish
Pages (from-to)281-303
Number of pages23
JournalEngineering Fracture Mechanics
Volume148
Publication statusPublished - 1 Nov 2015
MoE publication typeA1 Journal article-refereed

    Research areas

  • Application to Battelle drop weight tear test, MBW model, Strain rate and temperature dependent VUMAT, UMAT for material parameter calibration

ID: 29166705