| 材料参数对超塑性恒压充模胀形过程影响的数值分析 |
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| 引用本文： | 李园春,李淼泉.材料参数对超塑性恒压充模胀形过程影响的数值分析[J].航空学报,1997,18(2):183-188. |
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| 作者姓名： | 李园春 李淼泉 |
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| 作者单位： | 北京航空材料研究院(李园春)，西北工业大学４０２教研室(李淼泉) |
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| 摘 要： | 采用大变形刚粘塑性有限元法模拟了超塑性恒压充模胀形过程，分析了应变速率敏感性指数m、应变硬化指数n和厚向异性指数R等材料参数对胀形件厚度分布、成形时间、等效应变场及胀形成形能力的影响；通过对铝合金LY12CZ板料的相应实验对模拟结果进行了验证。
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| 关 键 词： | 材料参数 超塑性 恒压充模胀形 刚粘塑性有限元 |
NUMERICAL ANALYSIS OF THE EFFECTS OF MATERIAL PARAMETERS ON SUPERPLASTIC DIE BULGING PROCESS UNDER CONSTANT PRESSURE |
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| Li Yuanchun.NUMERICAL ANALYSIS OF THE EFFECTS OF MATERIAL PARAMETERS ON SUPERPLASTIC DIE BULGING PROCESS UNDER CONSTANT PRESSURE[J].Acta Aeronautica et Astronautica Sinica,1997,18(2):183-188. |
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| Authors: | Li Yuanchun |
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| Institution: | 1. Beijing Institute of Aeronautical Materials,Beijing,100095;2. Faculty 402,Northwestern Polytechnical University,Xi'an,710072 |
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| Abstract: | The superplastic die bulging process under constant pressure is simulated by using large deformation rigid visco plastic finite element method(FEM).The effects of material parameters,such as the strain rate sensitive index m ,the strain hardening index n ,and the normal anisotropy index R , on some aspects in the bulging process,which include the thickness distribution of the workpiece,the forming time,the effective strain field,and the deformation ability of the material,are analysed and discussed comprehensively.Corresponding experiments are performed on aluminum alloy LY12CZ and good agreement is found between the numerical and experimental results. |
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| Keywords: | material parameters superplasticity die bulging under constant pressure rigid visco plastic FEM |
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