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不同波形下应力早期不均匀性数值模拟

发表时间:2011-02-15  浏览量:1418  下载量:670
全部作者: 高科,李夕兵,周子龙
作者单位: 辽宁工程技术大学安全科学与工程学院;中南大学资源与安全工程学院
摘 要: 从SHPB实验装置加载波形入手,运用有限元软件ANSYS/LS-DYNA对传统矩形波和改进的半正弦波加载下并对比分析大直径SHPB试验中试件的早期应力均匀性,从试样达到应力平衡所需时间的快慢来考虑,验证了半正弦入射波加载方式对于岩石类脆性材料动态特性的测试具有显著优势。
关 键 词: 爆炸波、冲击波、应力波;矩形波;半正弦波;应力早期平衡;ANSYS/LS-DYNA
Title: Numerical simulation of early stage specimen stress equilibrium in different waveforms
Author: GAO Ke, LI Xibing, ZHOU Zilong
Organization: College of Safety Science and Engineering, Liaoning Technical University; School of Resources and Safety Engineering, Central South University
Abstract: Started with the loaded wave of SHPB, the early stage specimen stress equilibrium with rectangle and half-sine waves is analyzed by using the 3D non-linear dynamic finite element code ANSYS/LS-DYNA. The results validate and show that half-sine loaded wave of SHPB makes stress reach equilibrium faster than the rectangle loaded wave and is perfect to be used in the test with large-diameter SHPB for brittle materials such as rocks.
Key words: blast wave, shock wave and stress wave; rectangle wave; half-sine wave; early stage stress equilibrium; ANSYS/LS-DYNA
发表期数: 2011年2月第3期
引用格式: 高科,李夕兵,周子龙. 不同波形下应力早期不均匀性数值模拟[J]. 中国科技论文在线精品论文,2011,4(3):269-274.
 
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