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Dynamic response of a moving load on a micropolar half-space with irregularity

机译:微极性半空间上不规则运动载荷的动态响应

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摘要

Due to its ability to explain size effects on a small length scale by considering additional degrees of freedom, micropolar theory is preferred for describing media with complex mi-crostructures such as soil, composite materials, granular and powder-like materials, masonry, bones, and liquid crystals. In this study, a theoretical model is presented to investigate the response of a moving load on a micropolar half-space with irregularity. We obtain the closed-form expressions for normal stress, shear stress, and tangential couple stress. The effects of friction, microstructure, and irregularity in the medium are studied by introducing the fric-tional coefficient (R), coupling factor (N), and irregularity factor (x/a). We discuss the effects of varying the half-space depth and irregularity on the stresses. Two different cases of irregularity are compared, i.e., rectangular and parabolic.
机译:由于能够通过考虑其他自由度来解释小尺寸尺度上的尺寸影响,因此微极性理论更适合描述具有复杂微观结构的介质,例如土壤,复合材料,颗粒状和粉末状材料,砖石,骨头,和液晶。在这项研究中,提出了一个理论模型来研究具有不规则性的微极性半空间上的移动负载的响应。我们获得了法向应力,剪应力和切向耦合应力的闭合形式的表达式。通过引入摩擦系数(R),耦合因子(N)和不规则因子(x / a),研究了介质中摩擦,微观结构和不规则的影响。我们讨论了改变半空间深度和不规则性对应力的影响。比较了两种不同的不规则情况,即矩形和抛物线形。

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