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首页> 外文期刊>Journal of thermal stresses >HYGROTHERMAL EFFECTS ON INITIAL FRICTIONAL PULL-OUT FORCE OF CNTs-REINFORCED COMPOSITES
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HYGROTHERMAL EFFECTS ON INITIAL FRICTIONAL PULL-OUT FORCE OF CNTs-REINFORCED COMPOSITES

机译：碳纳米管增强复合材料初始摩擦拉拔力的热力学效应

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摘要

Based on the strong bonding between carbon nanotubes (CNTs) and the polymer matrix, the influence of hygrothermal environments on the initial pull-out force applied on the CNTs in CNTs-reinforced composite systems in investigated by means of thermoelasticity and conventional fiber pull-out models. According to the known literature, the material properties of the composite systems are affected by the variation of temperature and moisture, and the coefficient of thermal expansion of the CNTs is considered as transverse isotropic and is a nonlinear function of the temperature variation. The coefficient of thermal expansion of the polymer matrix is isotropic and is a linear function of the temperature variation. In a fully debonded region, an extended Coulomb's friction law, in which the friction coefficient depends on the pull-out rate, is used to determine the initial frictional pull-out force applied on the CNTs and the interfacial shear stress under various hygrothermal environments. In example calculations, the effects of the temperature variation of CNTs-reinforced composite systems, the moisture concentration variation in the matrix, the pull-out rate imposed on the CNTs end, the chiral vectors and the number of layers of the CNTs on the initial frictional pull-out force applied on the CNTs end in CNTs-reinforced composite systems are described and discussed.
机译：基于碳纳米管（CNT）和聚合物基体之间的牢固结合，通过热弹性和常规纤维拉拔的方法研究了湿热环境对碳纳米管增强复合材料系统中碳纳米管施加的初始拉拔力的影响。楷模。根据已知文献，复合系统的材料性能受温度和湿度变化的影响，并且CNT的热膨胀系数被认为是横向各向同性的，并且是温度变化的非线性函数。聚合物基体的热膨胀系数是各向同性的，并且是温度变化的线性函数。在完全脱胶的区域中，使用扩展的库仑摩擦定律（其中摩擦系数取决于拉出速率）来确定在各种湿热环境下施加到CNT上的初始摩擦拉出力和界面剪切应力。在示例计算中，碳纳米管增强复合系统的温度变化，基质中的水分浓度变化，施加在碳纳米管末端的拉出速率，手性矢量和碳纳米管在初始层上的层数的影响描述并讨论了在CNTs增强的复合材料系统中施加在CNTs末端的摩擦拔出力。

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