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基于内聚力模型的形状记忆合金短纤维增强树脂基复合材料的模拟分析

, PP. 236-243

Keywords: SMA复合材料,界面,内聚力模型,界面脱粘,数值模拟

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Abstract:

通过单纤维拔出实验和单轴拉伸实验,测定了形状记忆合金(SMA)增强树脂基复合材料的界面脱粘剪切强度和单向随机分布SMA短纤维增强复合材料的拉伸强度。根据蒙特卡罗法和边界条件控制方程,编写了适于软件调用的单向随机分布短纤维增强复合材料的APDL语言生成程序,建立数值模拟模型。基于指数型内聚力模型,对SMA纤维与环氧树脂基体界面分离(即界面脱粘)过程进行了有限元模拟。结果表明:相同纤维体积分数下,随着纤维长细比的减小,复合材料整体弹性模量逐渐降低;温度驱使SMA纤维弹性模量发生变化,可以有效提高复合材料整体弹性模量。

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