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首页> 外文会议>International Symposium on Impact Engineering >Validation of the Hardening Behaviors for Metallic Materials at High Strain Rate and Temperature by Using the Taylor Impact Test
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Validation of the Hardening Behaviors for Metallic Materials at High Strain Rate and Temperature by Using the Taylor Impact Test

机译：用泰勒冲击试验在高应变速率和温度下验证金属材料的硬化行为

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This paper is concerned with the validation of the dynamic hardening behaviors of metallic materials by comparing numerical and experimental results of the Taylor impact tests. Several uniaxial tensile tests are performed at different strain rates and temperatures by using three kinds of materials: 4130 steel (BCC); OFHC copper (FCC); and Ti6Al4V alloy (HCP). Uniaxial material tests are performed at a wide range of strain rates from 10~(-3) s~(-1) to 10~3 s~(-1). Moreover, tensile tests are performed at temperature of 25 °C and 200 °C at strain rates of 10~(-3) s~(-1), 10~(-1) s~(-1), and 10~2 s~(-1), respectively. A modified Johnson-Cook type thermal softening model is utilized for the accurate application of the thermal softening effect at different strain rates. The hardening behaviors of the three materials are characterized by comparing the seven sequentially deformed shapes of the projectile from numerical and experimental results of Taylor impact tests.
机译：本文涉及通过比较泰勒冲击试验的数值和实验结果来验证金属材料的动态硬化行为。通过三种材料在不同的应变速率和温度下进行几种单轴拉伸试验：4130钢（BCC）; OFHC铜（FCC）;和Ti6Al4V合金（HCP）。单轴材料试验在10〜（3）S〜（-1）至10〜3 s〜（-1）的范围内的菌株率。此外，拉伸试验在25℃和200℃的温度下以10〜（-3）S〜（-1），10〜（-1）S〜（-1），10〜2的温度下进行S〜（-1）分别。改进的Johnson-Cook型热软化模型用于准确应用不同应变率的热软化效果。三种材料的硬化行为的特征在于将七个序列变形的射弹的形状与泰勒冲击试验的数值和实验结果进行比较。

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