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首页> 外文会议>AMD-vol.256; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20051105-11; Orlando,FL(US) >DYNAMIC BEHAVIOR CHARACTERIZATION OF LEAD AT HIGH STRAIN RATES USING HIGH SPEED PHOTOGRAPHY FOR FINITE ELEMENT SIMULATION
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DYNAMIC BEHAVIOR CHARACTERIZATION OF LEAD AT HIGH STRAIN RATES USING HIGH SPEED PHOTOGRAPHY FOR FINITE ELEMENT SIMULATION

机译：高速摄影术中铅在高应变率下的动态特性表征

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摘要

This paper reviews experimental as well as computational techniques for determining stress-strain characteristics of materials at high strain rates. Quasi-static and dynamic compression tests were performed on standard Lead (Pb) specimens of three different L/D ratios, 0.8, 2 and 3. A Drop tower system was used to achieve different strain rates along with high-speed camera to capture the vertical and radial deformation of specimen and accelerometers to capture load data. The results obtained from the experiments were processed to generate dynamic stress-strain curve for Lead under different strain rate conditions. It was observed that the dynamic stress increases with increasing strain rate. The information gained is valuable for validating constitutive models.
机译：本文回顾了确定材料在高应变速率下的应力应变特性的实验和计算技术。在三种不同的L / D比（0.8、2和3）的标准铅（Pb）标本上进行了准静态和动态压缩测试。使用吊塔系统实现了不同的应变率，并使用了高速相机来捕捉样品和加速度计的垂直和径向变形，以捕获载荷数据。处理从实验获得的结果以生成在不同应变率条件下铅的动态应力-应变曲线。观察到动应力随着应变率的增加而增加。获得的信息对于验证本构模型很有价值。

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