[1]王刚,宋建,张建伟,等.基于多晶体模型的18CrNiMo7-6合金钢材料本构参数的确定[J].郑州大学学报(工学版),2020,41(02):41-46.
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基于多晶体模型的18CrNiMo7-6合金钢材料本构参数的确定()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41
期数:
2020年02期
页码:
41-46
栏目:
出版日期:
2020-05-31

文章信息/Info

Title:
Constitutive Parameters of 18CrNiMo7-6 Alloy Determined by a Polycrystalline Model
作者:
王刚宋建张建伟王冰冰
文献标志码:
A
摘要:
近年来考虑材料微结构不均匀性的晶粒几何模型和晶体塑性有限元方法备受关注。 为了获得 18CrNiMo7-6合金钢的本构参数,基于晶体塑性有限元方法对材料的晶体塑性参数进行了研究,采用晶 体率相关硬化模型,基于多晶体有限元方法对晶体的塑性参数进行了敏感性分析,确定了参数变化的范 围,并给出了一个代价函数,对有限元仿真结果进行处理,确定了一组最优的塑性参数组合。 利用拉伸 试验对计算结果进行了校准,结果表明模拟得到的应力⁃应变曲线和试验曲线吻合得较好,可为后续微 结构引起的不均匀应力集中分析提供必要的材料参数,具有重要的实际意义。
Abstract:
Grain geometry models with inhomogeneity of microstructures and crystal plastic finite elementmethods ( FEMs) have attracted more attention over recent years. To obtain constitutive parameters , anisotropyelastic and plastic constants of 18CrNiMo7-6 alloy steel were studied by using a crystal plastic FEM with soft-ware ABAQUS. Further, based on a polycrystalline FEM, sensitivity analysis of plastic parameters was carriedout with a crystal ratio-dependent hardening model. In line with numerical calculations and tensile tests, a costfunction was proposed and applied to determine a set of optimal plastic parameters. The results provided neces-sary material parameters for analysis of uneven stress concentration induced by microstructures.
更新日期/Last Update: 2020-05-30