【作者】 赵荣国； 刘亚风； 李微； 李其棒； 言怡； 陈悦； 张俊彦；

【Author】 ZHAO Rongguo;LIU Yafeng;LI Wei;LI Qibang;YAN Yi;CHEN Yue;Zhang Junyan;College of Civil Engineering and Mechanics,Xiangtan University;Institute of Rheological Mechanics,Xiangtan University;

【机构】 湘潭大学土木工程与力学学院； 湘潭大学流变力学研究所；

【摘要】 针对聚丙烯一类典型的非线性粘弹性材料,进行等幅循环应力加卸载实验,结果表明聚丙烯材料的现时应变响应表现出明显的蠕变变形、迟滞和非线性特性。采用弹性回复对应原理,对聚丙烯材料等幅循环应力历史条件下的现时应变响应进行预报,结果表明理论预测结果与实验数据吻合较好。更多还原

【Abstract】 A constant amplitude cyclic stress test for a class of typical nonlinear viscoelastic material as polypropylene is carried out at ambient temperature.The test curves show that the current strain responses of polypropylene manifest some properties as creep deformation,hysteresis and nonlinearity.The current strain responses of polypropylene under constant amplitude cyclic stress histories are predicted using theelasticity recovery correspondence principle.It is shown that the theoretically predicted strains are well fitted with test data.更多还原