• CN：11-2187/TH
• ISSN：0577-6686

• 运载工程 •

### 基于微观晶相建模的双相钢吸能特性研究

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

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.