基于流变学理论的TRIP600钢本构模型研究

发布时间：2018-01-04 03:15

本文关键词：基于流变学理论的TRIP600钢本构模型研究　出处：《机械工程学报》2016年10期 　论文类型：期刊论文

【摘要】：相变诱发塑性(Transformation induced plasticity,TRIP)钢在成形过程中容易发生开裂,主要是由于发生残余奥氏体向马氏体的转变,导致外力与变形不协调。其力学行为不仅有传统的弹性变形和塑性变形,还表现出与时间相关的黏性性质,因此在对其进行本构建模时有必要考虑时间因素对变形行为的影响作用。利用流变模型既可以通过不同构件的组合准确、合理地描述TRIP钢的软、硬相性质,还可以通过各个构件弹性、塑形及黏性系数的变化与组合描述TRIP钢在变形过程中残余奥氏体向马氏体转变的行为特性,即TRIP效应。本文基于流变学理论,对TRIP600的流变学本构模型进行研究和探讨,并最终建立TRIP600分别在蠕变和松弛试验条件下统一的本构方程。
[Abstract]:Transformation induced plasticity (Transformation induced, plasticity, TRIP) steel easily in the forming process of cracking is mainly due to residual austenite to martensite transformation, resulting in the force does not coordinate with the deformation. The mechanical behavior is not only the traditional elastic deformation and plastic deformation, also exhibit viscous properties associated with the time. Therefore in the constitutive modeling is necessary to consider the time factor influence on deformation behavior. The rheological model can not only accurately through the combination of different components of the TRIP steel reasonably describe the properties of soft, hard phase, but also through each component elasticity change and combination of plasticity and viscosity coefficient describes the behavior characteristics of TRIP steel in the deformation process of residual austenite to martensite transformation, i.e. TRIP effect. This paper based on the theories of rheology, the TRIP600 rheological constitutive model were researched and discussed, and finally The unified constitutive equation of TRIP600 under the conditions of creep and relaxation tests is established respectively.

【作者单位】：北京科技大学冶金工程研究院;
【基金】：国家自然科学基金资助项目(51374026)
【分类号】：TG142.1
【正文快照】： 0前言*一直以来研究人员对金属材料在塑性加工过程中所表现的力学行为进行本构建模时,大多采用弹塑性理论,塑性变形被认为与时间无关[1]。但是在工程实践中人们发现,当作用于固体材料的应力变化时,固体材料会显示出“瞬间”发生的应变,而且这种应变会随时间发生不同程度的变化

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