| 变形-损伤耦合的起塑性恒压轴对称充模胀形的有限元模拟 |
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| 引用本文： | 李园春,李淼泉,刘马宝,吴诗惇.变形-损伤耦合的起塑性恒压轴对称充模胀形的有限元模拟[J].固体力学学报,1997(2). |
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| 作者姓名： | 李园春 李淼泉 刘马宝 吴诗惇 |
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| 作者单位： | 北京航空材料研究院!23室，北京，100095，西北工业大学102教研室!西安，710072，西北工业大学102教研室!西安，710072，西北工业大学102教研室!西安，710072 |
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| 摘 要： | 采用大变形刚粘塑性有限元法模拟超塑性恒压轴对称充模胀形过程、分析了模具几何参数及材料参数对胀形过程中材料的流变行为、胀形制许厚度分布和成形时间的影响规律。给出了质点的流动轨迹、不同时刻制件的剖面形状及应力、应变分布；基于修正的Gurson粘塑性势推导了内部空洞体积分数累积增大模型并据此进行了变形-损伤耦合计算．
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| 关 键 词： | 超塑性充模胀形 空洞 有限元模拟 |
FINITE ELEMENT SIMULATION OF SUPERPLASTIC BULGING WITH AXISYMMETRIC DIE UNDER CONSTANT PRESSURE COUPLING DEFORMATION-DAMAGE |
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| Li Yuanchun.FINITE ELEMENT SIMULATION OF SUPERPLASTIC BULGING WITH AXISYMMETRIC DIE UNDER CONSTANT PRESSURE COUPLING DEFORMATION-DAMAGE[J].Acta Mechnica Solida Sinica,1997(2). |
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| Authors: | Li Yuanchun |
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| Abstract: | The superplastic bulging with axisymmetric die under constant pressure is simulatedby using large deformation rigid-plastic finite element method. The effects of the geometric parame-ters of die and material parameters on several aspects including the flowing behaviour of the materi- al, the thickness distribution of the specimen and the forming time in bulging process are analysed.Aside from the trace of material points - the stress and strain distribution at different forming time isalso given. Based on the modified Gurson visco-plastic potential. the incremental model of the in-ternal cavity volume fraction is deduced and then the calculation for the coupling of deformation-demage is performed. |
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| Keywords: | superplastic bulging with die cavity finite element method |
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