| 大锻件控性锻造过程的计算机模拟技术 |
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| 引用本文： | 崔振山,陈文,陈飞,张效迅. 大锻件控性锻造过程的计算机模拟技术[J]. 机械工程学报, 2010, 46(11). DOI: 10.3901/JME.2010.11.002 |
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| 作者姓名： | 崔振山 陈文 陈飞 张效迅 |
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| 作者单位： | 1. 上海交通大学塑性成形工程系,上海,200030
2. 上海工程技术大学材料工程学院,上海,201620 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(973计划 |
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| 摘 要： | 提出能够模拟大锻件空洞型缺陷演化和微观组织演变等控性指标的数值模拟方法。基于典型体元模型建立空洞体积变化与宏观应力应变场关系的数学模型,以图从多尺度角度揭示宏观的塑性变形及其应力状态对随机分布的微小空洞的体积变化影响规律。将该模型与有限元法集成,当锻件内任意一点有空洞型缺陷(给定缺陷体积百分比)时,能够模拟得到成形过程中空洞型缺陷的体积变化,从而可被用来评估含缩孔缩松缺陷材料的压实状态。采用元胞自动机方法建立一种转子钢的微观组织演变模拟方法,根据"应变—位错密度—动态再结晶—流动应力"之间的宏微观相互影响规律,模拟出动态再结晶晶粒尺寸和完成分数。将这些模型与热力耦合有限元法相结合,构造大锻件控性锻造过程的数值模拟技术。根据大锻件增量成形的变形特点开发基于刚性区自由度凝聚技术的快速有限元法,从而为大锻件成形的工艺优化提供有效的计算工具。
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| 关 键 词： | 大锻件 控性成形 缺陷闭合 微观组织 数值模拟 |
Computer Modeling of Property-Controlled Forging Process for Heavy Forgings |
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| CUI Zhenshan,CHEN Wen,CHEN Fei,ZHANG Xiaoxun. Computer Modeling of Property-Controlled Forging Process for Heavy Forgings[J]. Chinese Journal of Mechanical Engineering, 2010, 46(11). DOI: 10.3901/JME.2010.11.002 |
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| Authors: | CUI Zhenshan CHEN Wen CHEN Fei ZHANG Xiaoxun |
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| Affiliation: | CUI Zhenshan1 CHEN Wen1 CHEN Fei1 ZHANG Xiaoxun2 (1. Department of Plasticity Technology,Shanghai Jiao Tong University,Shanghai 200030,2. School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620) |
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| Abstract: | A numerical simulation method is presented to evaluate the controlling issues of property for heavy forgings such as the evolvement of void defect and the evolution of microstructure. In order to reveal the multi-scale effect of macroscopic plastic deformation as well as the stress state on the volumetric evolvement of tiny voids stochastically distributed in the forgings,a model calculating the void volumetric change through macroscopic stress and strain field is investigated by using a representative volu... |
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| Keywords: | Heavy forgings Property-controlled forming Voids closure Microstructure Numerical simulation |
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