期刊
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
卷 38, 期 1, 页码 41-50出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2010.08.001
关键词
Polymers; Strain-rate effects; Split Hopkinson pressure bar; Drucker-Prager model; Literal confinement
资金
- School of Mechanical, Aerospace and Civil Engineering, The University of Manchester
- Henry Lester Trust
Dynamic behavior of polymers at high strain rates from 10(1) to 10(4) s(-1) is frequently investigated by split Hopkinson pressure bar (SHPB) technique. It is found that the apparent strain-rate effect on the dynamic yield stress of polymers based on SHPB tests may include significant contributions from lateral confinement effects when the strain-rate is beyond a transition strain-rate. A methodology based on numerical SHPB tests and the constitutive equation without considering strain-rate effect is proposed to identify this transition strain rate. Experimentally-measured strain-rate dependence of the peak stress up to the transition strain rate is recommended for the determination of the strain-rate dependence of the polymer, which is subsequently implemented into a dynamic constitutive equation including strain-rate and temperature effects. This dynamic constitutive equation together with a kinetic friction model is used to simulate the SHPB tests in independent publications. Reasonably good agreements between numerical predictions and experimental results are observed for a range of polymers at strain rates below 10(4) s(-1). (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据