Measurement of Microscopic Stress and Strain Distribution at Sub-grain Scale Considering Crystalline Anisotropy

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760077
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Materials/Mechanics of materials
• Research Institution: Osaka University
• Principal Investigator: MIKAMI Yoshiki 大阪大学, 工学(系)研究科(研究院), 助教 (40397758)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 微視的ひずみ / 微視的応力 / 結晶方位 / デジタル画像相関法 / 結晶塑性論 / 有限要素解析

Outline of Final Research Achievements

The evaluation of the microscopic stress or strain distribution at crystalline scale is essential in the investigation of the deformation and fracture behavior of structural metallic materials. In this study, the following two approaches were taken: (1) Measurement of displacement and strain on the specimen surface by digital image correlation (DIC) technique, (2) Numerical simulation of microscopic stress and strain distribution considering crystal anisotropy and crystal plasticity. Additionally, a method to determine slip deformation at crystalline scale that can reproduce the measured deformation obtained by DIC approach on the specimen surface was proposed. Microscopic stress distribution was estimated based on the determined slip deformation considering crystalline orientation.

Free Research Field

微視的材料強度学