• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Mechanical Behavior of Lead at High Strain Rates
【24h】

Mechanical Behavior of Lead at High Strain Rates

机译：高应变率铅的力学行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a study on the material behaviors and constitutive models of lead at high strain rates. Quasi-static compressive tests and split Hopkinson pressure bar (SHPB) tests were conducted at room temperature. The results of the SHPB tests were verified by high-speed photography, and the error of strain is less than 3% at high strain rate (5000/s). Our results show that the yield stress and flow stress increase at high strain rates. This result indicates that lead is sensitive to the strain rate at high strain rates, but the dependence is not linear during 3000-5000/s. The strain-rate dependence of lead was fitted by a quadratic polynomial curve. To describe the nonlinear strain-rate relationship of lead, modified Johnson-Cook and Cowper-Symonds material models were used to fit the experimental stress-strain curves. The modified Cowper-Symonds model agrees better with the experimental results and can better describe the dynamic mechanical behavior of lead under high strain rates.
机译：本文介绍了高应变率铅的材料行为和本构模型的研究。在室温下进行准静态压缩测试和分裂霍普金森压力棒（SHPB）测试。通过高速摄影验证了SHPB测试的结果，应变率高的应变误差小于3％（5000 / s）。我们的结果表明，高应变率屈服应力和流量应力增加。该结果表明铅对高应变率的应变率敏感，但在3000-5000 / s期间，依赖性不是线性的。铅的应变率依赖性由二次多项式曲线装配。为了描述铅的非线性应变率关系，改进的Johnson-Cook和Cowper-Symonds材料模型用于适合实验性应力 - 应变曲线。修改的Codper-Symonds模型通过实验结果同意，可以更好地描述高应变率下铅的动态力学行为。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号