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Experimental and modelling studies of the shape memory properties of amorphous polymer network composites

机译：非晶态聚合物网络复合材料形状记忆特性的实验和建模研究

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Shape memory polymer composites (SMPCs) have become an important way to leverage improvements in the development of applications featuring shape memory polymers (SMPs). In this study, an amorphous SMP matrix has been filled with different types of reinforcements. An experimental set of results is presented and then compared to three-dimensional (3D) finiteelement simulations. Thermomechanical shape memory cycles were performed in uniaxial tension. The fillers effect was studied in stress-free and constrained-strain recoveries. Experimental observations indicate complete shape recovery and put in evidence the increased sensitivity of constrained length stress recoveries to the heating ramp on the tested composites. The simulations reproduced a simplified periodic reinforced composite and used a model for the matrix material that has been previously tested on regular SMPs. The latter combines viscoelasticity at finite strain and time-temperature superposition. The simulations easily allow representation of the recovery properties of a reinforced SMP.
机译：形状记忆聚合物复合材料（SMPC）已成为利用以形状记忆聚合物（SMP）为特征的应用程序开发中改进的一种重要方式。在这项研究中，无定形的SMP基质已经填充了不同类型的增强材料。提出了一组实验结果，然后将其与三维（3D）有限元模拟进行了比较。热机械形状记忆循环在单轴张力下进行。研究了填料在无应力和约束应变恢复下的作用。实验观察表明完全的形状恢复，并证明了受约束的长度应力恢复对测试复合材料加热坡道的敏感性增加。模拟再现了简化的周期性增强复合材料，并使用了先前已在常规SMP上测试过的基质材料模型。后者将有限应变下的粘弹性与时温叠加相结合。通过仿真，可以轻松表示增强型SMP的恢复特性。

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