Peridynamic Modeling of Granular Fracture in Polycrystalline Materials

被引：67

作者：

De Meo, Dennj ^{[1
]}

Zhu, Ning ^{[1
]}

Oterkus, Erkan ^{[1
]}

机构：

[1] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow G4 0LZ, Lanark, Scotland

来源：

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME | 2016年 / 138卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

transgranular fracture; polycrystalline materials; peridynamics; dynamic fracture; crack branching; intergranular fracture; DYNAMIC CRACK-PROPAGATION; GRAIN LEVEL MODEL; FAILURE INITIATION; BRITTLE MATERIALS; MICROSTRUCTURES; DIFFRACTION; DEGRADATION; EVOLUTION;

D O I：

10.1115/1.4033634

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A new peridynamic (PD) formulation is developed for cubic polycrystalline materials. The new approach can be a good alternative to traditional techniques such as finite element method (FEM) and boundary element method (BEM). The formulation is validated by considering a polycrystal subjected to tension-loading condition and comparing the displacement field obtained from both PDs and FEM. Both static and dynamic loading conditions for initially damaged and undamaged structures are considered and the results of plane stress and plane strain configurations are compared. Finally, the effect of grain boundary strength, grain size, fracture toughness, and grain orientation on time-to-failure, crack speed, fracture behavior, and fracture morphology are investigated and the expected transgranular and intergranular failure modes are successfully captured. To the best of the authors' knowledge, this is the first time that a PD material model for cubic crystals is given in detail.

引用

页数：16

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