Continuum modeling of strain-induced martensitic transformation at shear-band intersections
Continuum modeling of strain-induced martensitic transformation at shear-band intersections
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DOI：
10.1016/s1359-6454(98)00314-0
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发表时间：
1998-12-10
期刊：
影响因子：
9.4
通讯作者：
Olson, GB
中科院分区：
文献类型：
--
作者：
Levitas, VI;Idesman, AV;Olson, GB
用细观连续体热力学方法研究了剪切带交叉处的应变诱发马氏体相变问题。将计算的相变功泛函与临界驱动力判据和稳定性分析相结合，用于求解非均匀塑性变形介质中马氏体相变的边值问题。在边界位移控制下，解在剪切带交叉口表现出优先转换，在交叉口以外的增长受到限制，在交叉口过程中而不是在交叉口之后的优先转换，以及相同效力的多个交叉口的顺序运行而不是同时运行。在固定应力边界条件下，交叉口外的进一步发展是有利的。介观热力学考虑因素对塑料环境中的相变行为提供了有用的见解。(C)1998爱思唯尔科学有限公司出版的Acta Metallurica Inc.保留所有权利。
A mesoscopic continuum thermomechanical approach is applied to the problem of strain-induced martensitic transformation at shear-band intersection. A computed transformation work functional combined with a critical driving force criterion and stability analysis are employed in the solution of boundary-value problems addressing aspects of martensitic transformations in a heterogeneous plastically deforming medium. Under boundary displacement control, solutions demonstrate preferred transformation at shear-band intersections, restricted growth beyond intersections, preferred transformation during rather than after intersection process, and sequential rather than simultaneous operation of multiple intersections of identical potency. Further growth beyond intersections is favored under fixed stress boundary conditions. Mesoscopic thermomechanical considerations offer useful insights into transformation behavior in a plastic environment. (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.