Develpment of space-time multiscale fracture model in consideration of environmental factors

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13416
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Computational science
• Research Institution: Tohoku University
• Principal Investigator: Terada Kenjiro 東北大学, 災害科学国際研究所, 教授 (40282678)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 時空間マルチスケール解析 / モデル化 / 土木材料 / 機械材料・材料力学 / 計算物理

Outline of Final Research Achievements

Based on space-time multiscale modeling, we have developed a prototype of cohesive zone model to assess the residual strength of the structure subject to local chemical action of hydrogen. A damage variable representing material degradations is introduced to a cohesive zone model by use of the thermodynamics approach. Our model, in which the decrease of the energy release rate caused by hydrogen is considered, enables us to evaluate the hydrogen embrittlement. Some representative numerical examples are presented to demonstrate the performance of the proposed model in simulating fracture processes accelerated by the hydrogen concentration.

Free Research Field

計算力学