| 钨合金帽型试样的绝热剪切带数值模拟研究 |
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| 引用本文： | 刘铁,史洪刚,程新,尚福军,王晓彦,黄伟,陈子明.钨合金帽型试样的绝热剪切带数值模拟研究[J].兵器材料科学与工程,2008,31(2):75-79. |
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| 作者姓名： | 刘铁 史洪刚 程新 尚福军 王晓彦 黄伟 陈子明 |
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| 作者单位： | 中国兵器科学研究院,宁波分院,浙江,宁波,315103;内蒙古北方重工集团培训中心,内蒙古,包头,014030;西安理工大学,水利水电学院,陕西,西安,710048 |
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| 摘 要： | 利用帽型试样在 Hopkinson 压杆上测试锻造退火态钨合金的动态应力-应变关系,通过计算拟合钨合金材料Johnson-Cook 本构关系中的5个待定参量,建立帽型试样的有限元模型。采用两种不同的网格划分,在剪切区域内采用细密的网格,并逐渐过渡到粗糙网格。利用有限元分析软件 LS-DYNA 模拟钨合金帽型试样在冲击载荷下绝热剪切带的形成过程,与试验观察结果一致,对于理论分析和试验具有一定的参考和指导作用。
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| 关 键 词： | 钨合金 绝热剪切带 有限元模拟 帽型试样 动态力学性能 |
| 文章编号： | 1004-244X(2008)02-0075-05 |
| 修稿时间： | 2006年12月12 |
Numerical simulations for adiabatic shear bands of WHA in hat specimen |
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| LIU Tie,SHI Hong-gang,CHENG Xin,SHANG Fu-jun,WANG Xiao-yan,HUANG Wei,CHEN Zi-ming.Numerical simulations for adiabatic shear bands of WHA in hat specimen[J].Ordnance Material Science and Engineering,2008,31(2):75-79. |
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| Authors: | LIU Tie SHI Hong-gang CHENG Xin SHANG Fu-jun WANG Xiao-yan HUANG Wei CHEN Zi-ming |
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| Abstract: | Dynamic properties of the tungsten heavy alloys were investigated using a hat specimen on the Hopkinson rod of Split Compression.Five material constants of Johnson-Cook model were determined by numerical simulation.Based on the finite element of hat specimen,the formation of adiabatic shear bands in hat specimen of tungsten heavy alloys under impact loading was simulated by the finite element software of LS-DYNA.Comparison with the existing experimental results was made showing good agreement.The work of the paper can be a reference for further experiment and theoretical analysis. |
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| Keywords: | tungsten heavy alloys adiabatic shear bands finite element simulation hat specimen dynamic mechanism |
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