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首页> 外文期刊>International Journal of Mechanical Sciences >Dynamic analysis of fiber pullout mechanism in cementitious composites under harmonic pullout displacement: analytical approach
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Dynamic analysis of fiber pullout mechanism in cementitious composites under harmonic pullout displacement: analytical approach

机译：谐波拉伸位移下水泥基复合材料纤维拉伸机理的动力学分析：解析法

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摘要

Fiber pullout from the concrete matrix is a main characteristic damage mechanism which is observed in cementitious composites, like textile reinforced concrete and fiber reinforced cement composites, and it affects their mechanical behavior under static and dynamic loads. In this paper, an appropriate analytical model of the fiber pullout mechanism is proposed and closed-form analytical solutions are provided under a dynamical excitation of prescribed harmonic pullout displacements at the fiber tip. The constitutive behavior of the matrix fiber interface is provided by considering the damage behavior, where an elastic damage material model of the interface is employed. For comparison purposes, derived solutions from corresponding Finite-Element simulations of the fiber pullout mechanism are provided and compared with the obtained analytical solutions.
机译：从混凝土基体中拔出纤维是在水泥复合材料中观察到的主要特征破坏机理，例如纺织增强混凝土和纤维增强水泥复合材料，并且它会影响其在静态和动态载荷下的机械性能。在本文中，提出了一种合适的纤维拔出机构的分析模型，并在动态激励下在光纤尖端规定谐波拔出位移的情况下，提供了封闭形式的解析解。通过考虑损伤行为来提供基体纤维界面的本构行为，其中采用了界面的弹性损伤材料模型。为了进行比较，提供了从光纤拉出机构的相应有限元模拟得出的解，并将其与所获得的解析解进行了比较。

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