%0 Journal Article
%T A Setting-platen Experimental Method on SHPB System for High-strength Materials<br>用于高强度材料的SHPB实验添加垫块法
%A ZHANG Xiao-qing
%A YAO Xiao-hu
%A YANG Gui-tong
%A HUANG Xiao-qing
%A <br>张晓晴
%A 姚小虎
%A 杨桂通
%A 黄小清
%J 实验力学
%D 2005
%I 
%X An improved experimental method, so called setting-platen method, on Split Hopkinson Pressure Bar system for high-strength materials is presented. The reasonableness and feasibility of the improved SHPB method are analyzed by numerical simulation using the finite element code LS-LYNA3D. According to the theory of one-dimensional stress wave, the modification method on data handling is given. As an instance, the dynamic mechanical property of high-strength Al_2O_3 ceramics is investigated using the improved technique of SHPB. The dynamic stress-strain curves are obtained in the range of higher strain rates and higher stress and strain than that by using the conventional SHPB method. It is shown that Al_2O_3 ceramic is a nonlinear elastic-brittle material and sensitive to strain-rate. It is indicated that the deformation and damage of the bar ends can be prevented effectively by using setting-platen method and the stress, strain and strain rate of specimen can be improved so as to meet the demand of research. The setting-platen method affords a special and feasible way to perform high strain rate dynamic tests on high-strength materials by SHPB technology.
%K High-strength materials
%K SHPB technology
%K Setting-platen method<br>高强度材料
%K SHPB实验
%K 添加垫块法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=49067A0A0D864088C06A84AACB51A5B2&aid=657C3BCC6C87C5BD&yid=2DD7160C83D0ACED&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=7979125BBE749348&eid=5D8C08279A19B0D4&journal_id=1001-4888&journal_name=实验力学&referenced_num=0&reference_num=7