• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2016, Vol. 52 ›› Issue (4): 120-125.doi: 10.3901/JME.2016.04.120

• 运载工程 • 上一篇    下一篇

基于微观晶相建模的双相钢吸能特性研究

庄蔚敏, 解东旋, 叶辉   

  1. 吉林大学汽车仿真与控制国家重点实验室 长春 130022
  • 出版日期:2016-02-15 发布日期:2016-02-15
  • 作者简介:E-mail:zhuangwm@jlu.edu.cn;解东旋(通信作者),男,1989年出生,博士研究生。主要研究方向为车身结构设计与优化、有限元分析和金属成形技术。E-mail:jiedx14@mails.jlu.edu.cn
  • 基金资助:
    国家自然科学基金(51375201)和吉林省自然科学基金(20130101048JC)资助项目

Research on Energy Absorption Characteristics of Dual-phase Steel Based on Micro-crystalline Phase Modeling

ZHUANG Weimin, XIE Dongxuan, YE Hui   

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022
  • Online:2016-02-15 Published:2016-02-15

摘要: 基于Voronoi和概率分布理论,提出材料微观晶相建模方法及其实现流程,建立微观晶相可视化几何模型。通过将微观晶相生成系统和ABAQUS有限元软件相结合,实现了基于微观晶相建模的双相钢有限元仿真,仿真中单相铁素体及马氏体均采用理想弹塑性材料模型,同时,以延性损伤模型模拟材料的破坏行为。以该仿真模型为基础,建立一系列不同晶粒尺寸、不同马氏体体积分数的双相钢微观晶相仿真模型,进行双相钢吸能特性研究,研究表明虽然双相钢吸能量随晶粒尺寸的不同略有差异,但总体均随马氏体体积分数的增加呈现先上升后下降的趋势,最优吸能时双相钢中马氏体体积分数均在2%~5%范围内。实现了双相钢微观尺度下的吸能研究,为轻量化汽车车身安全件的选材提供指导。

关键词: 车身安全件, 晶相建模, 双相钢, 吸能特性

Abstract: Based on the Voronoi tessellation and probability theories, a material modeling method of micro-crystalline phase and its realization process are proposed, and a visual geometric model of micro-crystalline phase is established. Through the combination of micro-crystalline phase generating system and finite element(FE) solver, ABAQUS, FE simulation for dual-phase steel based on micro-crystalline phase modeling can be achieved. In the simulation, the ferrite and martensite of single phase are both simulated by the ideal elastic-plastic model, and the material damage behavior is simulated using ductile damage model. On this basis, a series of micro-crystalline phase simulation models of different grain sizes and different martensite volume fractions for dual-phase steel are established, and the energy absorption characteristic of dual-phase steel is studied. It is found that though the energy absorption for dual-phase steel varies with the grain sizes slightly, the overall trend for all is increased first and then decreased with increasing the martensite volume fraction. The martensite volume fractions for dual-phase steel of optimal energy absorption are all within the range of 2% to 5%. The energy absorption research of dual-phase steel under micro-scale is realized, and guidance for selection of lightweight body safety components is provided.

Key words: body safety components, crystalline phase modeling, dual-phase steel, energy absorption characteristic

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