【摘 要】
：
Carbon nanotubes (CNTs) show unique combination of extraordinary physical and mechanical properties such as Youngs modulus,tensile strength,density,and ther
【机 构】
：
MechanicalDesignDepartment,FacultyofEngineering,E1-Mataria,HelwanUniversityP.O.Box11718,Cairo,Egypt;
【出 处】
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The 5th Asian Conference on Mechanics of Functional Material
论文部分内容阅读
Carbon nanotubes (CNTs) show unique combination of extraordinary physical and mechanical properties such as Youngs modulus,tensile strength,density,and thermal expansion coefficient.Therefore,they are beneficial when used as reinforcements in different composite materials.The prediction of the different properties of composites containing CNTs is significantly related to the assumption of CNT/matrix morphology.Assuming straight nanotubes showed that the actual moduli are remarkably less than the micromechanical predictions.Because both waviness and congestion are drastically reducing the stiffening effect of CNTs and they are two important factors influencing the reinforcing efficiency.Therefore,the actual or near to actual shape and distribution of CNTs in the matrix should be considered when evaluating the effective properties of such nanocomposites in order to obtain realistic results.In this work,the aim is to propose a micromechanical model,which is based on Eshelby and Mori-Tanaka models,to consider the distribution functions of the CNTs parameters including waviness and congestion.This model can be used for modeling not only ideal nanocomposites where CNTs are straight and uniformly distributed but also realistic nanocomposites with curved and/or agglomerated CNTs.The computational results of the model are compared with other ones extracted from the literature and good agreement is obtained.Eventually,the proposed micromechanical model can be used for various nanocomposite systems providing up-front guidelines for manufacturing nanocomposites with engineered properties.
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