【作者】 李玉坤； 于文广； 李自力； 王鸿膺；

【Author】 Li Yukun;Yu Wenguang;Li Zili;Wang Hongying;College of Pipeline and Civil Engineering in China University of Petroleum (East China);

【机构】 中国石油大学(华东)储运与建筑工程学院；

【摘要】 为探究Q235钢中应力和温度对临界折射纵波(L_CR波)传播的影响规律,本文基于声弹性效应搭建了L_CR波应力测量系统。首先恒温条件下,分别对平行应力方向和垂直应力方向LCR波的应力系数进行了实验测试与标定;其次进行了变温度拉伸实验,试件每加载一次拉力,探究温度对Q235钢中L_CR波传播时间的影响规律。研究发现:L_CR波在Q235钢中传播时应力与温度对应力系数影响规律显著。更多还原

【Abstract】 To explore the law of effect that stress and temperature have on the propagation of longitudinal critical refraction wave(L_CR wave) in the Q235 steel, the L_CR wave stress measurement system is built based on the Acousto-elasticity effect. In the constant temperature condition, the stress coefficients of L_CR wave are calibrated whose propagation direction is parallel and vertical to the direction of stress; Load tensile stress of different level on the test specimen and explore the law of influence that temperature has on the time of the propagation of L_CR wave in the Q235 steel in the condition of different levels of tensile stress. The conclusion is: the propagation of L_CR wave in the Q235 steel is observably influenced by the stress and temperature.更多还原