The influences of deformation state and experimental conditions on inelastic behaviour of an extruded thermoplastic polyurethane elastomer
The influences of deformation state and experimental conditions on inelastic behaviour of an extruded thermoplastic polyurethane elastomer
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DOI：
10.1016/j.matdes.2013.02.055
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发表时间：
2013-08-01
影响因子：
8.4
通讯作者：
Tato, Wilson
中科院分区：
文献类型：
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作者：
Bartolome, Luis;Aurrekoetxea, Jon;Tato, Wilson
热塑性聚氨酯弹性体在循环加载-卸载条件下表现出非弹性效应，主要是应力软化、滞后损耗和残余应变。为了讨论这些效应对变形状态（单轴拉伸和纯剪切）和工作条件（最大应变、应变速率和拉伸方向）的敏感性，本研究关注的是挤出的热塑性聚氨酯弹性体在经受加卸载循环时的非弹性效应。基于在两种拉伸条件下的非弹性效应的行为，本工作表明，应力软化和残余应变是敏感的变形状态，只有当达到最大应变引起永久变形。此外，滞后损失表现出依赖于最大应变的独立行为。最后，对于挤出的热塑性聚氨酯弹性体，滞后损耗和残余应变的行为是各向同性的。(C)2013爱思唯尔有限公司保留所有权利。
Thermoplastic polyurethane elastomers under cyclic loading-unloading conditions exhibit inelastic effects, mainly stress softening, hysteresis loss and residual strain. In order to discuss the sensitivity of these effects to deformation state (uniaxial tension and pure shear) and to work conditions (maximum strain, strain-rate and stretching direction), this study is concerned with inelastic effects of an extruded thermoplastic polyurethane elastomer when is subjected to loading-unloading cycles. Based on the behaviour of inelastic effects under both tensile conditions, the present work shows that stress softening and residual strain are sensitive to deformation state only when the maximum strain reached causes permanent set. Furthermore, the hysteresis loss shows an independent behaviour depending on maximum strain. Finally, the behaviour of the hysteresis loss and the residual strain is isotropic for the extruded thermoplastic polyurethane elastomer. (C) 2013 Elsevier Ltd. All rights reserved.