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Hydrogen informed Gurson model for hydrogen embrittlement simulation

Hydrogen informed Gurson model for hydrogen embrittlement simulation

Category
Journal publication
Abstract
Hydrogen-microvoid interactions were studied via unit cell analyses with different hydrogen concentrations. The absolute failure strain decreases with hydrogen concentration, but the failure loci were found to follow the same trend dependent only on stress triaxiality, in other words, the effects of geometric constraint and hydrogen on failure are decoupled. Guided by the decoupling principle, a hydrogen informed Gurson model is proposed. This model is the first practical hydrogen embrittlement simulation tool based on the hydrogen enhanced localized plasticity (HELP) mechanism. It introduces only one additional hydrogen related parameter into the Gurson model and is able to capture hydrogen enhanced internal necking failure of microvoids with accuracy; its parameter calibration procedure is straightforward and cost efficient for engineering purpose.
Client
  • Norges forskningsråd / 234130
Language
English
Author(s)
  • Yu Haiyang
  • Olsen Jim Stian
  • Alvaro Antonio
  • Qiao Lijie
  • He Jianying
  • Zhang Zhiliang
Affiliation
  • Norwegian University of Science and Technology
  • University of Oxford
  • SINTEF Industry / Materials and Nanotechnology
  • University of Science and Technology Beijing
Year
2019
Published in
Engineering Fracture Mechanics
ISSN
0013-7944
Volume
217:106542
Page(s)
1 - 12