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Modélisation du Comportement Thermomécanique des Polymères à mémoire de Forme

Abstract : A chemically crosslinked amorphous acrylate network has been prepared in the laboratory. Its mechanical properties were characterized by quasi-static and cyclic uniaxial tensile tests, while varying the temperature. The shape memory property of the polymer was recognized by the application of specific thermomechanical cycles in uniaxial tension (free-length and constrained-length recovery). During the experimental study, the thermomechanical cycle parameters were varied in order to study their influence on the shape memory behavior. Two additional studies were included to improve the potential applications of shape memory polymers. The first study targeted the use of the material shape memory property for subsequent shape memory cycles. The second study aimed at improving the material shape memory properties during fixed length heating (constrained-length recovery) by adding fillers .In order to improve the shape memory polymers application design, a large strain model, combining the material viscoleasticity and its time-temperature superposition property, was chosen to predict the shape memory behavior of the material. The model features, existing in the material behavior libraries of the finite element code Abaqus, allowed simulating numerically the experimental thermomechanical shape memory cycles. Results of the simulations showed good agreements when compared with the experimental results, reproducing the shape memory cycles influence to loading parameters. A parameter sensitivity analysis revealed the shape memory property dependence on the time-temperature superposition.
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Submitted on : Saturday, March 7, 2015 - 12:26:55 AM
Last modification on : Wednesday, September 28, 2022 - 5:50:28 AM
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  • HAL Id : tel-01127146, version 1


Juan Sebastian Arrieta Escobar. Modélisation du Comportement Thermomécanique des Polymères à mémoire de Forme. Mécanique des matériaux [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2014. Français. ⟨NNT : 2014ENAM0031⟩. ⟨tel-01127146⟩



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