摘要
形状记忆聚合物(SMP)作为典型智能材料,由于其独特的形状记忆特性,在航空航天、微系统和生物医学领域已经引起了极大的关注。为了更加准确地利用SMP的形状记忆特性进行工程应用,本工作采用相变本构和黏弹性本构两种模型进行对比仿真研究。首先,基于细观力学的经典相变理论结合SMP材料,给出其存储应变公式的显式解析解;通过单轴拉伸、应力松弛和热力循环等一系列实验获取两种本构模型的各项参数;模拟SMP的热力形状记忆循环过程,将不同本构模型的数值仿真结果与实验结果进行对比分析。研究结果表明,采用相变理论的本构模型时,其仿真结果与实验结果更一致,能够更准确地反映SMP材料的形状记忆特性。
Shape memory polymer(SMP),as a typical smart material,has attracted great attention in the fields of aerospace,microsystems and biomedicine due to its unique shape memory properties.In order to make more accurate use of the shape memory characteristics of SMP for engineering applications,this work used phase transition constitutive and viscoelastic constitutive models for comparative simulation research.Firstly,using the classical phase transition theory of micromechanics combined with SMP materials,an explicit analytical solution of its stored strain formula was given.Through a series of experiments such as uniaxial tension,stress relaxation and thermal cycling,the parameters of the two constitutive models were obtained,and then the thermal shape memory cycle process of SMP was simulated.The numerical simulation results of different constitutive models are compared with the experimental results.The research results show that the simulation results of the constitutive model using phase transition theory are more consistent with the experimental results,and can more accurately reflect the shape memory characteristics of SMP materials.
作者
张芳芳
周蕊
孙毅刚
刘兵飞
杜春志
洪彬
ZHANG Fangfang;ZHOU Rui;SUN Yigang;LIU Bingfei;DU Chunzhi;HONG Bin(School of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;School of Transportation Science and Engineering,Civil Aviation University of China,Tianjin 300300,China;Tianjin Tianbo Keda Technology Co.,Ltd.,Tianjin 300192,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第15期192-198,共7页
Materials Reports
基金
中央高校基本科研业务费自然科学重点项目(3122022106)
关键词
形状记忆聚合物(SMP)
相变本构
黏弹性本构
数值模拟
shape memory polymer(SMP)
phase transition constitutive
viscoelastic constitutive
numerical simulation
作者简介
张芳芳,中国民航大学研究生。2018年6月毕业于南京航空航天大学,获得工程学士学位。研究方向:形状记忆聚合物及其复合材料力学特性;周蕊,中国民航大学副教授,天津大学机械工程专业博士。研究方向为塑性成形理论及数值模拟研究。先后主持或参与国家自然科学基金青年项目等项目10余项,发表SCI、EI、北大核心期刊论文10余篇。reaterbutter@163.com。
