| 引用本文: | 李学通,王敏婷,张沛,杜凤山.大型饼类锻件镦粗过程形变力学演变研究[J].材料科学与工艺,2011,19(6):53-57.DOI:10.11951/j.issn.1005-0299.20110610. |
| LI Xue-tong,WANG Min-ting,ZHANG Pei,DU Feng-shan.Deformation mechanism in the upsetting process of heavy disk-shaped forgings[J].Materials Science and Technology,2011,19(6):53-57.DOI:10.11951/j.issn.1005-0299.20110610. |
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| 摘要: |
| 针对大型饼类锻件夹层裂纹缺陷形成力学机理问题,采用非线性有限元模拟技术,建立了圆柱锻件镦粗过程的热力耦合分析模型.通过模拟计算,分析了H/D>2时镦粗过程中各向应力场、等效应变、应变速度以及形变梯度分布规律,得出了镦粗过程锻件内部应力状态演变分布图.研究结果表明:对于大型饼类锻件,夹层裂纹缺陷不能从应力状态得出合理的解答,但从三向受压条件下形变不协调性可获解释. |
| 关键词: 大型饼类锻件 夹层裂纹 有限元 形变梯度 |
| DOI：10.11951/j.issn.1005-0299.20110610 |
| 分类号:TG316 |
| 基金项目:国家自然科学基金资助项目(51075352);河北省自然科学基金资助项目(E2011203090) |
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| Deformation mechanism in the upsetting process of heavy disk-shaped forgings |
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LI Xue-tong1, WANG Min-ting1, ZHANG Pei1, DU Feng-shan2
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1.College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;2.YUTONG Heavy Industries Co.,Ltd.of Zhengzhou,Zhengzhou 450051,China
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| Abstract: |
| To understand the reason of laminated crack in the upsetting of heavy disk-shaped forgings,finite element software was used to simulate the upsetting process of cylinder forgings,and the distribution map of stress state evolution was obtained.The simulation results show that a reasonable explaination of laminated crack defect of heavy disk-shaped forgings could not be obtained from stress state,but from deformation incoordination under tri-lateral compression. |
| Key words: heavy disk-shaped forgings laminated crack finite element method deformation gradient |
