| 大型饼类锻件镦粗夹层裂纹缺陷形成机理研究 |
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| 引用本文： | 李学通, 张沛, 王敏婷, 杜凤山. 大型饼类锻件镦粗夹层裂纹缺陷形成机理研究[J]. 固体力学学报, 2012, 33(3): 273-278. doi: 10.3969/j.issn.0254-7805.2012.03.006 |
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| 作者姓名： | 李学通 张沛 王敏婷 杜凤山 |
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| 作者单位： | 燕山大学机械工程学院,国家冷轧板带装备及工艺工程技术研究中心,秦皇岛,066004; 郑州宇通重工有限公司,郑州,450051; 燕山大学机械工程学院,国家冷轧板带装备及工艺工程技术研究中心,秦皇岛,066004; 燕山大学机械工程学院,国家冷轧板带装备及工艺工程技术研究中心,秦皇岛,066004 |
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| 基金项目： | “十一五”国家科技支撑计划，国家自然科学基金项目，河北省自然科学基金 |
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| 摘 要： | 针对大型饼类锻件镦粗过程出现的夹层裂纹缺陷问题,采用有限元技术,建立锻件镦粗过程的热力耦合理论分析模型,计算了镦粗过程中等效应变、等效应变速率及其对应梯度的演变规律.通过对各场变量演变分布的分析,提出了基于变形程度与变形速度梯度组合式的夹层缺陷判断模型,并获得了锻件心部夹层裂纹的形貌和分布.通过对比计算结果与实验测试数据,二者吻合良好.
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| 关 键 词： | 大型饼类锻件 镦粗 夹层裂纹缺陷 有限元 |
| 收稿时间： | 2011-03-09 |
STUDY ON MECHANISM OF LAMINATED CRACK DEFECT IN THE UPSETTING PROCESS OF HEAVY DISK-SHAPED FORGINGS |
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| Xuetong Li, Pei Zhang, Minting Wang, Fengshan Du. STUDY ON MECHANISM OF LAMINATED CRACK DEFECT IN THE UPSETTING PROCESS OF HEAVY DISK-SHAPED FORGINGS[J]. Chinese Journal of Solid Mechanics, 2012, 33(3): 273-278. doi: 10.3969/j.issn.0254-7805.2012.03.006 |
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| Authors: | Xuetong Li Pei Zhang Minting Wang Fengshan Du |
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| Affiliation: | 1(1 College of Mechanical Engineering,National Engineering Research Center for Equipment and Technology of Cold Rolling Strip,Yanshan University,Qinhuangdao,066004)(2 Yutong Heavy Industries Co.,Ltd.of Zhengzhou,Zhengzhou,450051) |
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| Abstract: | Aiming to laminated crack defect occurring in the upsetting of heavy disk-shaped forgings, finite element analysis technique was using to establish coupling thermo-mechanical simulation model for upsetting process. By aid of the model, the distributions of equivalent strain, equivalent strain rate and its’ gradients. After analyzing the change law of the different fields, a model of laminated crack defect was setted up based on strain and strain rate gradient, and obtain the morphology distribution of laminated crack at the center of forgings. The numerical simulation result coincides well with the experimental data. |
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