弯曲载荷下碳纳米管力学行为的数值模拟

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The bending mechanical behavior of carbon nanotubes is numerically investigated according to an advanced finite element analysis package,ABAQUS.ABAQUS is used to simulate the formation of the bending carbon nanotubes.Comparing the result from the finite element method with the result of the molecular dynamics calculation validates the validity of the finite element method.This method is used to reveal that the critical bending curvature is affected by the diameter and the length of the carbon nanotubes.Comparing the result with the molecular dynamics result proves the dependability of the finite element method in simulation.为研究碳纳米管在弯曲载荷作用下的非线性力学行为,用ABAQUS有限元软件模拟单壁碳纳米管的变形.比较有限元计算结果和分子动力学的计算结果,验证了有限元方法的有效性.利用有限元方法研究了单壁碳纳米管临界弯曲屈曲曲率随直径和长度的变化关系,并与分子动力学的计算结果比对,证实有限元方法模拟纳米尺度问题的可靠性.