SHPB数据处理中的二波法与三波法

Two-wave and three-wave method in SHPB data processing

1.
CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, Anhui, China；
2.
Faculty of Engineering, Ningbo University, Ningbo 315211, Zhejiang, China

摘要: 分析了传统的分离式霍普金森压杆测试数据处理方法(二波法)及其他被提出的改进方法的误差及优缺点，给出了传统二波处理方法在不同被测材料情况下所带来的误差。分析结果表明，基于绝对时间下的试件应力及应变计算的三波处理法具有最好的可信度且能最大程度地避免数据处理过程中的人为因素。传统二波法在不同测试情况下均不是优选的方法。对于三波测试无法进行的情况，也提出了一种简化三波处理方法。
- 固体力学 /
- 简化三波法 /
- 一维应力波理论 /
- SHPB /
- 二波法 /
- 三波法
Abstract: Advantages and disadvantages of classical and some modified methods for SHPB data processing are discussed. Errors brought by using the classical methods under different experimental conditions are analyzed. Results show that the three-wave method which calculate the stress and strain with absolute time holds the best reliability and requires the least artificial correction, and the classical two-wave method is not a good choice for data processing in any circumstances. A simplified three-wave method is also proposed for some cases where three-wave measurement is impossible.
- solid mechanics /
- simplified three-wave method /
- one-dismensional stress wave theory /
- SHPB /
- two-wave method /
- three-wave method