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工程力学  2015 

弹射冲击载荷作用下沥青混凝土路面面层的损伤

DOI: 10.6052/j.issn.1000-4750.2014.02.0111, PP. 161-168

Keywords: 冲击损伤,弹射冲击载荷,ZWT本构,沥青混凝土,用户材料子程序

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Abstract:

沥青混凝土作为一种粘弹性材料一般只研究其疲劳损伤特性,冲击损伤研究较少。针对路面在弹射载荷作用下产生中低应变率响应的特点,采用Cauchy应变表达的三维简化ZWT(朱-王-唐)非线性粘弹本构模型以及应变率相关的损伤演化模型,建立了增量形式并将Kirchhoff应力转化为Cauchy应力,编写用户材料子程序嵌入有限元软件中。推导了恒应变率条件下含损伤的简化ZWT本构表达式,使用最小二乘法拟合出本构参数。分析了沥青混凝土场坪面层的冲击损伤,阐明了损伤变化规律、分布规律,为发射场坪的选择提供了一定参考。

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