| 轴对称拉深成形法兰区起皱失稳变形能及临界压边力 |
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| 引用本文： | 秦泗吉,梁韶伟,张树栋. 轴对称拉深成形法兰区起皱失稳变形能及临界压边力[J]. 中国机械工程, 2013, 24(23): 3244-3248 |
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| 作者姓名： | 秦泗吉 梁韶伟 张树栋 |
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| 作者单位： | 燕山大学先进锻压技术与科学教育部重点实验室，秦皇岛，066004 |
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| 基金项目： | 国家自然科学基金资助项目(51175451)；河北省自然科学基金资助项目（E2010001216） |
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| 摘 要： | 在平面应变假设条件下，对轴对称拉深成形法兰区的起皱失稳问题进行了理论分析。首先采用数学方法，将以积分形式表示的应力解析式进行了简化。在此基础上，进一步简化了起皱过程中变形能的计算式。给出的算例表明，对起皱过程中的变形能分别以简化后的计算式和以原积分式进行计算，其结果误差很小，相对误差小于0.8%。该起皱失稳临界压边力的计算和分析简化方法有助于给出简明和符合实际的起皱判据。
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| 关 键 词： | 轴对称拉深 临界压边力 变形能 起皱 |
Strain Energy and Critical BHF of Flange Wrinkling Instability in Axisymmetric Deep Drawing Process |
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| Qin Siji,Liang Shaowei,Zhang Shudong. Strain Energy and Critical BHF of Flange Wrinkling Instability in Axisymmetric Deep Drawing Process[J]. China Mechanical Engineering, 2013, 24(23): 3244-3248 |
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| Authors: | Qin Siji Liang Shaowei Zhang Shudong |
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| Affiliation: | Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education,Yanshan University, Qinhuangdao, Hebei, 066004 |
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| Abstract: | In the condition of the plane strain hypothesis, flange wrinkling instability of the sheet metal in axisymmetric deep drawing was analyzed theoretically. At first, stress formula in integral form was simplified by mathematical method. On the basis of that, the calculation of the strain energy was simplified. Given examples show that the calculation results by simplified formula are close to that by original integral one. The maximum relative error is less than 0.8%. Finally, a simplified formula for calculation of critical BHF of wrinkling instability was given. It is helpful to provide concise and realistic wrinkling criterion. |
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| Keywords: | axisymmetric deep drawing process critical blank holding force(BHF) strain energy wrinkle |
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