A computational approach based on ordinary state-based peridynamics with new transition bond for dynamic fracture analysis

被引：55

作者：

Imachi, Michiya ^{[1
]}

Tanaka, Satoyuki ^{[1
]}

Tinh Quoc Bui ^{[2
]}

Oterkus, Selda ^{[3
]}

Oterkus, Erkan ^{[3
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Hiroshima, Japan

[2] Tokyo Inst Technol, Dept Civil & Environm Engn, Tokyo, Japan

[3] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow, Lanark, Scotland

来源：

ENGINEERING FRACTURE MECHANICS | 2019年 / 206卷

关键词：

Peridynamics; Dynamic fracture; Dynamic stress intensity factors; Crack propagation; FINITE-ELEMENT-METHOD; STRESS INTENSITY FACTORS; CRACK-PROPAGATION; MESHFREE METHOD; GROWTH; BODIES; MODEL;

D O I：

10.1016/j.engfracmech.2018.11.054

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The recently developed ordinary state-based peridynamics (OSPD) is further enhanced to study elastodynamic propagating crack based on the dynamic stress intensity factors (DSIFs). The displacement discontinuity such as a crack surface is represented by a bond-failure. Variations of the mixed-mode DSIFs with time are evaluated by the interaction integral method for the dynamic crack propagation. In terms of OSPD fracture modeling, numerical oscillation of DSIFs becomes a critical issue during the evolution of a crack. To overcome this numerical oscillation problem, we introduce a new model of bond-failure, the transition bond. The enhanced OSPD approach using the new transition bond model offers accurate and acceptable results, suppressing the numerical oscillation of responses and reflecting an effective approach. The effects of different types of transition bond are numerically analyzed. Accuracy of the DSIFs is examined employing the various damping parameters and effectiveness of the new PD fracture model is verified. The Kalthoff-Winkler impact test is considered for evaluating the mixed-mode DSIFs and the crack paths.

引用

页码：359 / 374

页数：16

共 36 条

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