Computational Modelling of Fracture in Polycrystalline Materials
Computational Modelling of Fracture in Polycrystalline Materials
复制标题
多晶材料断裂的计算模型
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Ge Smith
中科院分区：
文献类型：
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作者：
A. Crocker;P. Flewitt;Ge Smith
摘要：本文简要介绍了用于模拟材料断裂的计算方法，特别是多晶金属和合金，并更详细地考虑了几何建模的使用。讨论了不同的断裂模式，穿晶和晶间的脆性和韧性，以及采用的宏观、微观和纳米尺度应用的建模工具。然后概述了用于创建二维和三维多晶材料的计算机模型以及通过它们传播裂纹的程序。然后介绍了这些方法在研究解理裂纹跨晶界扩展、研究织构、晶粒形状、杂质偏析和先行蠕变空化的影响、研究铁素体钢的韧脆过渡区域以及考虑加工硬化对韧性断裂的影响等方面的应用。将预测结果与实验结果进行了比较，并对今后的研究提出了建议。
Abstract This review provides a brief survey of the computational methods which have been adopted to model fracture in materials, particularly polycrystalline metals and alloys, and considers in greater detail the use of geometrical modelling. The different modes of fracture, transgranular and intergranular brittle and ductile, are discussed, together with the modelling tools adopted for macroscale, microscale and nanoscale applications. The procedures which have been used for creating computer models of two– and three–dimensional polycrystalline materials and for propagating cracks through them are then outlined. Applications of these methods to investigate the propagation of cleavage cracks across grain boundaries, to study the influence of texture, grain shape, impurity segregation and prior creep cavitation, to examine the ductile–to–brittle transition region in ferritic steels and to consider the influence of work hardening on ductile fracture are then presented. The predictions are compared with experimental results and proposals for future studies are discussed.