| 耦合温度和应变率的铝合金板成形极限预测方法 |
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| 引用本文： | 于忠奇,侯波,李淑慧,林忠钦.耦合温度和应变率的铝合金板成形极限预测方法[J].机械工程学报,2010,46(8). |
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| 作者姓名： | 于忠奇 侯波 李淑慧 林忠钦 |
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| 作者单位： | 上海交通大学机械与动力工程学院,上海,200240;上海市数字化汽车车身工程重点实验室,上海,200240 |
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| 基金项目： | 国家自然科学基金资助项目(50605043);;国家高技术发展计划(863计划,2007AA04Z145)资助项目 |
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| 摘 要： | 为了提高铝合金板成形能力,一些先进成形工艺已经被开发。温成形是实现铝合金高成形能力和高成形精度的一种有效方法。温度和成形速度是影响铝合金板温成形工艺的重要参数,对其成形性能影响十分显著。提出一种综合考虑温度和应变率影响的铝合金板成形极限预测方法。采用响应面法建立铝合金板应变硬化指数n、应变率敏感度指数m与成形温度、应变率条件之间的力学性能函数关系;基于M-K理论,并结合Logan-Hosford屈服函数,推导出耦合温度和应变率的铝合金板成形极限图计算模型。模型检验表明力学性能响应面方程具有较高精度。成形极限的计算结果与已有的试验值对比表明,二者吻合较好,这证实耦合温度和应变率的铝板成形极限预测方法是正确和可靠的。
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| 关 键 词： | 温成形 铝合金板 成形极限 应变率 |
Prediction of Forming Limit for Aluminum Alloy Sheet Coupling with Temperature and Strain Rate |
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| YU Zhongqi,HOU Bo,LI Shuhui,LIN Zhongqin.Prediction of Forming Limit for Aluminum Alloy Sheet Coupling with Temperature and Strain Rate[J].Chinese Journal of Mechanical Engineering,2010,46(8). |
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| Authors: | YU Zhongqi HOU Bo LI Shuhui LIN Zhongqin |
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| Affiliation: | 1.School of Mechanical Engineering/a>;Shanghai Jiao Tong University/a>;Shanghai 200240/a>;2.Shanghai Key Laboratory of Digital Auto-body Engineering/a>;Shanghai 200240 |
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| Abstract: | In order to enhance the formability of aluminum alloy sheet,advanced forming technologies have been developed.Warm forming is an effective technology to realize high formability and high forming accuracy of aluminum alloy.The forming speed and temperature are important parameters of the warm forming technology and have significant effect on the formability of aluminum alloy sheet.A new approach for predicting forming limit of aluminum alloy sheet with comprehensive consideration of the influences of tempera... |
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| Keywords: | Warm forming Aluminum alloy sheet Forming limit Strain rate |
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