刘静
,
李兰云
,
李霄
,
李渊博
中国有色金属学报
基于环形试样轴压实验、有限元模拟、回归分析和遗传算法相结合的反求方法对厚壁钛管压缩状态下的塑性材料参数进行快速识别,利用试验方法研究机床弹性变形时TA18厚壁钛管不同圆环压缩试样高度下试样鼓肚率和机床弹性变形的变化情况,并在此基础上确定了试样高度范围,获得了试验力-位移曲线.利用反求方法确定了其压缩应力应变关系,并将其应用在不同高度钛管环形试样轴压模拟中,与试验进行对比,以发现反求获得的应力-应变曲线可以较好地预测钛管轴向压缩变形行为,对压缩试样变形后最大直径和载荷的预测误差分别不超过1.5％和11％.
关键词:
厚壁钛管
,
圆环压缩试样
,
反求方法
,
压缩应力状态
,
应力-应变关系
L. Chen
,
P.L. Wang
,
P.N. Song
,
J.Y. Zhang
,
null
,
null
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null
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null
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null
,
null
,
null
,
null
,
null
,
null
,
null
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null
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金属学报(英文版)
With the technology support of virtual reality and ANSYS software, an example on the simulation of temperature distribution of casting system during the solidification process was provided, which took the latent heat of phase change, the conditions for convection, and the interface heat transfer coefficient into consideration. The result of ANSYS was found to agree well with the test data. This research offers an unorthodox way or“Reverse Method” of defining the relevant thermal physical coefficient.
关键词:
solidification process
,
null
,
null
