采用基于直纳米碳管拉伸曲线与单元"死亡"技术的非线性有限元方法模拟了"Y"形、竹节形与直纳米碳管的拉伸失效过程.对比并讨论了"Y"形、竹节形纳米碳管与直碳管的拉伸力学性能.研究表明,本文的非线性有限元方法能够有效模拟纳米碳管的拉伸力学特性;拉伸"Y"形、竹节形碳管的失效发生在其粗管与细管过渡的"应力集中"部位;"Y"形、竹节形碳管的抗拉强度与韧性明显低于直碳管;然而,"Y"形、竹节形碳管的弹性模量与直碳管相当.
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