Study on Effect of Strain Rate for Reversible Plasticity Shape Memory Polymer
- 주제(키워드) Reversible plasticity Shape memory polymer , Cowper-Symonds model , Elongation , Fracture , Finite element model
- 발행기관 서강대학교 일반대학원
- 지도교수 김동철
- 발행년도 2018
- 학위수여년월 2018. 2
- 학위명 석사
- 학과 및 전공 일반대학원 기계공학과
- 실제URI http://www.dcollection.net/handler/sogang/000000063160
- 본문언어 영어
- 저작권 서강대학교 논문은 저작권보호를 받습니다.
초록/요약
Shape memory polymer (SMP) has been intensely studied for various industrial applications, such as biomedical and aerospace field, due to its unique thermo-mechanical behavior (i.e., shape recovery). However, the researches of reversible plasticity shape memory polymers are insufficient. Here, we study the thermo-mechanical behavior of polyurethane based shape memory polymer under glass transition temperature. We add various types of fiber in order to improve the stiffness of SMP. Then, we measure mechanical stiffness and shape recovery properties of RPSM polymers. We also analyzed effect of strain rate on yield stress and elongation to take into account the application range of RPSM polymers and made RPSM polymer material model which is depends on strain rates. By using numerical simulation. To confirm the application range of the RPSM polymers, we apply this material model to automobile bumper and analyze the possibility of using RPSM polymers to automobile bumpers through low speed collision simulation.
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