Dynamic Fracture Analysis for Brittle Material Using Peridynamics

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K04582
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 24020:Marine engineering-related
• Research Institution: Hiroshima University
• Principal Investigator: Tanaka Satoyuki 広島大学, 先進理工系科学研究科(工), 准教授 (20452609)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: Peridynamics / 破壊力学 / 脆性材料 / メッシュフリー/粒子法 / 有限要素法 / 動的破壊

Outline of Final Research Achievements

When operating transportation vehicles and welded structures, there are possibility to generate fracture and damage in the structures. Under further mechanical loading, the fracture and damage will be developed. Fracture mechanics; it is one of the evaluation techniques for the fracture behaviors from material and mechanics aspects. In evaluating the cracked structures, numerical simulation is one of the methods. Accurate numerical modeling is required for the simulation, however, there are difficulties to accurately model the cracked structure or the fracture behaviors. In the present study, Peridynamics is studied as a new method to analyze cracked structures. Accurate fracture evaluation using Peridynamics is studied.

Free Research Field

船舶海洋工学

Academic Significance and Societal Importance of the Research Achievements

本研究を通して，Peridynamics を用いて動的き裂進展現象の評価およびその高精度化を行うことができた．これまで構造解析で用いられてきた有限要素法と比較して，き裂を含む構造のモデル化の自由度が高く，かつ，既存の結果と比較しても遜色ない動的き裂進展挙動を行える数値解析法を構築することができた．