Multi-scale non-destructive simulation using an inverse homogenization method

2015 Fiscal Year Final Research Report

• Project/Area Number: 24360175
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Tohoku University
• Principal Investigator: Takashi Kyoya 東北大学, 工学(系)研究科(研究院), 教授 (00186347)
• Co-Investigator(Kenkyū-buntansha): KATO Junji 東北大学, 大学院工学研究科, 准教授 (00594087) ; TERADA Kenjiro 東北大学, 災害科学国際研究所, 教授 (40282678)
• Co-Investigator(Renkei-kenkyūsha): NAKAHATA Kazuyuki 愛媛大学, 理工学研究科, 准教授 (20380256)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: micro-crack / topology optimization / inverse-homogenization / non-destructive / simulation

Outline of Final Research Achievements

This research takes numerical approaches; EFIT and the inverse homogenization method using the finite element method; aimed at identifying the distribution of micro-cracks, which cause degradation of, and damage to, structures. The research proposed a series of methods using optimization algorithms to calculate the micro-crack distribution with material stiffness equivalent to that of the given anisotropic material, and examined how well the methods modeled the distribution. While previous studies on non-destructive testing simulation by means of topology optimization are able to identify only a few damaged parts in material, this method is able to reproduce the directions of damaged parts, micro-cracks: this improvement is a step forward in the development of this field.

Free Research Field

応用力学