Effect of Impact Velocity and Temperature on Residual Strength Subjected to Compression After Impact of Laminates
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摘要: 为研究冲击速度和温度对层合板冲后压的影响，建立考虑温度影响的渐进损伤模型预测材料的损伤模式，并分析层合板在低速冲击下的损伤机理。首先将模型预测的冲后压位移应力曲线与实验进行对照，进一步分析不同冲击速度对压痕深度、分层区域面积和剩余强度的影响，最后在2.3 m/s冲击速度下分析了不同温度对剩余强度和分层区域面积的影响。Abstract: In order to study the effect of the impact velocity and temperature on the compression after impact of laminates, a progressive damage model considering temperature effect is established to predict the damage mode of laminates, and the damage mechanism of laminates under low velocity impact is analyzed. Firstly, the displacement-stress curve predicted by the model is compared with the experimental. The influence of the different impact velocity on the indentation depth, delamination area and residual strength is further analyzed. Finally, the influence of the different temperature on the residual strength and delamination area at an impact velocity of 2.3 m/s is analyzed.
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Key words:
- laminate /
- temperature /
- compression after impact /
- residual strength /
- progressive damage model /
- VUMAT subroutine
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表 1 刚度折减方案
损伤类型 材料退化方式 基体拉伸 E22=0.2E22, G12=0.2G12, G3=0.2G3 基体压缩 E22=0.4E22, G12=0.4G12, G3=0.4G3 纤维拉伸 Eii=0.07Eii(i=1, 2, 3), Gij=0.14Gij, υij=0.07υij(i, j=1, 2, 3, i≠j) 纤维压缩 Eii=0.14Eii(i=1, 2, 3), Gij=0.14Gij, υij=0.14υij(i, j=1, 2, 3, i≠j) 纤维基体剪切 G12=0.1G12, υ12=0.1υ12 分层 E33=0.1E33, G3=0.1G23, G13=0.1G13, υ13=0.1υ13, υ23=0.1υ23 
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表 2 层合板材料参数
E11/GPa E22/GPa ν G12/GPa XT/MPa XC/MPa YT/MPa YC/MPa S/MPa 135 8.8 0.33 4.47 1 239 1 081 39 189 81
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