机械制造与自动化
機械製造與自動化
궤계제조여자동화
JIANGSU MACHINE BUILDING & AUTOMATION
2015年
4期
91-94
,共4页
形状记忆聚合物%三维本构%率相关%有限元方法
形狀記憶聚閤物%三維本構%率相關%有限元方法
형상기억취합물%삼유본구%솔상관%유한원방법
shape memory polymers%3D constitutive equation%rate-dependent%FEM
考虑蠕变残余应变的温度相关性,假设形状记忆聚合物为各向同性材料,将一维热力学本构方程扩展到三维。基于该增量形式的本构,在有限元软件ABAQUS中开发了适用于模拟形状记忆聚合物形状记忆过程的材料接口子程序,对形状记忆聚合物记忆过程进行有限元模拟。分析了加载速率和变温速率对形状记忆聚合物的热力学性能和记忆性能的影响,数值模拟的结果与实验吻合良好。
攷慮蠕變殘餘應變的溫度相關性,假設形狀記憶聚閤物為各嚮同性材料,將一維熱力學本構方程擴展到三維。基于該增量形式的本構,在有限元軟件ABAQUS中開髮瞭適用于模擬形狀記憶聚閤物形狀記憶過程的材料接口子程序,對形狀記憶聚閤物記憶過程進行有限元模擬。分析瞭加載速率和變溫速率對形狀記憶聚閤物的熱力學性能和記憶性能的影響,數值模擬的結果與實驗吻閤良好。
고필연변잔여응변적온도상관성,가설형상기억취합물위각향동성재료,장일유열역학본구방정확전도삼유。기우해증량형식적본구,재유한원연건ABAQUS중개발료괄용우모의형상기억취합물형상기억과정적재료접구자정서,대형상기억취합물기억과정진행유한원모의。분석료가재속솔화변온속솔대형상기억취합물적열역학성능화기억성능적영향,수치모의적결과여실험문합량호。
Assuming shape memory polymers to be isotropic, with consideration of temperature-dependent creep residual strain,a three-dimensional thermo-mechanical constitutive equation of shape memory polymers( SMPs) is derived from one-dimensional con-stitutive relationship based on viscoelastic theory. A user material subroutine program of the CAE software ABAQUS is compiled to simulate the memory process. Strain/temperature rates impact on the thermo-mechanical and shape memory properties of SMPs is analyzed and it shows a good agreement with the experimental data.