所属单位：航空学院
发表刊物：SMART MATERIALS AND STRUCTURES
关键字：shape memory polymers cyclic tension behaviors fractional derivative model rate-dependent yielding factor
摘要：This paper presents intensive studies on the strain rate-, hold time-, and temperature-dependent cyclic behaviors of amorphous shape memory polymers (SMPs). The cyclic characteristics play a vital role in the application of SMPs since the materials suffer cyclic loadings commonly in engineering. A multi-branch fractional derivative model is employed in the paper to investigate the complicated mechanisms underlying the cyclic behaviors. And a modified Eying model is incorporated with the fractional derivative model to describe the temperature-dependent yielding and post-yielding behaviors. A rate-dependent yielding factor is proposed in the study to depict the influence of strain rates. The validity and adaptability of the model are verified through comparisons between the simulations and experimental results of two different materials subjected to different loading conditions. In addition, detailed parameter studies provide effective suggestions on improving the performance of SMPs under various conditions.
ISSN号：0964-1726
是否译文：否
发表时间：2018-07-01
合写作者：Zeng, Hao,Leng, Jinsong,Gu, Jianping,Yin, Chenxi
通讯作者：Leng, Jinsong,孙慧玉,孙慧玉
发表时间：2018-07-01