Meshfree modelling of brittle and ductile dynamic fracture

被引：3

作者：

Wang, S. ^{[1
]}

机构：

[1] Tongji Univ, Shanghai 200092, Peoples R China

来源：

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2016年 / 90卷

关键词：

Cracking particles method; Dynamic fracture; Johnson-Cook model; Impact; FINITE-ELEMENT-METHOD; SMOOTHED PARTICLE HYDRODYNAMICS; LOADED PRENOTCHED PLATES; PROPAGATING SHEAR BANDS; PHANTOM-NODE METHOD; CRACK-PROPAGATION; THIN SHELL; NUMERICAL SIMULATIONS; WEAK DISCONTINUITIES; 3-DIMENSIONAL CRACK;

D O I：

10.1016/j.ijimpeng.2015.10.009

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This manuscript presents studies from brittle to ductile fracture by a simplified meshfree method. The Johnson-Cook model is employed to model the behaviour in the bulk, while the cracking particles methods (CPM) are used to model discrete cracks. The influence of a cohesive zone model on the crack paths and the crack speed is studied. It will be shown that it has only a minor influence on the results for ductile fracture while it affects the crack speed for brittle fracture. Furthermore, the influence of temperature is tested, and it is shown that for ductile fracture, the temperature is the key parameter while it has less effect for brittle fracture. Double-notched and single-notched specimens are tested, and the experimental results are compared to results of our computational method for different discretisations. These results reveal that our method is a good pathway to study the failure transition from brittle-to-ductile fracture. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：177 / 182

页数：6

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