基于流变学理论的TRIP600钢本构模型研究

doi:10.3901/JME.2016.10.075

摘要/Abstract

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。

关键词: TRIP效应, 本构方程, 弹黏塑性, 流变学, 蠕变, 松弛

Abstract: Transformation induced plasticity(TRIP) steels are prone to crack during forming process, mainly because of the transformation of retained austenite to martensite, causing discordance between external force and deformation. The mechanical behavior of TRIP steels has conventional elastic and plastic deformation, as well as time-dependent viscous properties. So it is necessary to consider the effect of time to their deformation behavior during constitutive model building. The rheological model can be used in TRIP steels not only to reveal the soft and hard phase properties accurately and reasonably by combination of different components but also to indicate the TRIP effect during deformation process by change and combination of coefficients of components. Rheological constitutive models for TRIP600 are researched and discussed based on rheological theory, and finally the uniform constitutive equations under creep and stress relaxation condition are built.

Key words: constitutive equation, creep, elastic-viscoplastic, relaxation, rheology, TRIP effect

中图分类号:

TG113

孙蓟泉, 尹衍军, 牛闯, 滕胜阳. 基于流变学理论的TRIP600钢本构模型研究[J]. 机械工程学报, 2016, 52(10): 75-83.

SUN Jiquan, YIN Yanjun, NIU Chuang, TENG Shengyang. Research on Constitutive Model of TRIP600 Based on Rheological Theory[J]. Journal of Mechanical Engineering, 2016, 52(10): 75-83.

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