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Affiliation of Author(s):航空学院

Title of Paper:Modeling the strain rate-, hold time-, and temperature-dependent cyclic behaviors of amorphous shape memory polymers

Journal:SMART MATERIALS AND STRUCTURES

Key Words:shape memory polymers cyclic tension behaviors fractional derivative model rate-dependent yielding factor

Abstract: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 No.:0964-1726

Translation or Not:no

Date of Publication:2018-07-01

Co-author:Zeng, Hao,Leng, Jinsong,Gu, Jianping,Yin, Chenxi

Correspondence Author:Leng, Jinsong,孙慧玉,Sun Huiyu