| 温成形中铝合金板成形极限图的预测研究 |
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| 引用本文： | 侯波,于忠奇,李淑慧,林忠钦.温成形中铝合金板成形极限图的预测研究[J].材料科学与工艺,2009(5):616-619. |
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| 作者姓名： | 侯波 于忠奇 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;上海市数字化汽车车身工程重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(50605043); 国家高技术研究发展计划资助项目(2007AA04Z145) |
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| 摘 要： | 在铝合金板温成形数值仿真中,成形极限图是判断材料颈缩失效和评价温冲压成形能力的基础.提出了一种温成形条件下铝合金板成形极限图的理论预测方法.采用曲线拟合方法建立了Al5083-O铝合金板应变硬化指数、应变率硬化指数随成形温度的变化规律;采用M-K理论模型,结合Logan-Hosford屈服函数计算获得温成形条件下铝合金板的成形极限图.计算结果与实验数据吻合较好,证实了温成形条件下铝板成形极限图的理论预测方法是正确的.
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| 关 键 词： | 温成形 成形极限 铝合金板 M-K理论 成形性能 |
Prediction of forming limit diagram of aluminum sheet at elevated temperatures |
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| HOU Bo,YU Zhong-qi,LI Shu-hui,LIN Zhong-qin.Prediction of forming limit diagram of aluminum sheet at elevated temperatures[J].Materials Science and Technology,2009(5):616-619. |
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| Authors: | HOU Bo YU Zhong-qi LI Shu-hui LIN Zhong-qin |
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| Affiliation: | HOU Bo,YU Zhong-qi,LI Shu-hui,LIN Zhong-qin(1.School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China,2.Shanghai Key Laboratory of Digital Auto-body Engineering,China) |
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| Abstract: | Numerical simulations of warm forming of aluminum alloy sheet need an accurate forming limit diagram to obtain highly reliable formability predictions.Thus a new approach for predicting the forming limit of aluminum alloy sheet at elevated temperatures is presented.Curve fitting technique is used to calculate the hardening parameters of Al5083-O sheet as a relational function of temperature.Based on M-K theory,the forming limit of Al5083-O sheet at different temperatures is calculated by using Logan-Hosford... |
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| Keywords: | warm forming forming limit aluminum alloy sheet M-K model formability |
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