Polymeric composites exhibit load sensitive stiffness unlike the case of homogeneous metallic material. Composites are widely used in dynamic loading environment and hence it is necessary to study their response in terms of structural properties. Behavioural changes of glass epoxy composite laminate on exposure to cyclic loading has been assessed in terms of energy dissipation (E_d) and Damping factor (DF) by hysteresis loop. GFRP composite specimens (UD-0, 0/30/60/0, 0/45/0/-45, 0/90/90/0, and 0/90/0/90) are exposed to low velocity constant amplitude cyclic loading using a laboratory arrangement (by an eccentric disc) at 4.6 Hz and 8.6 Hz frequencies. In fibre-reinforced composites apart from the fibre volume fraction, the fibre interaction angle significantly influences their dynamic properties on loading. Unidirectional (UD-0) laminate exhibits low damping/energy dissipation, while 0/90/0/90 laminate with large fibre interaction angle shows highest damping/energy dissipation. Whereas, symmetric cross ply (0/90/90/0) laminate acts as a performance demarcation among the chosen laminates. Thus, optimum E_d/DF properties of GFRP laminate in dynamic environment is attributed to symmetric lay-up, smaller fibre orientation interaction angle in the lay-up sequence and 0 fibre layer at the boundary.

与均质金属材料不同，聚合物复合材料表现出对负载敏感的刚度。复合材料广泛用于动态载荷环境，因此有必要研究其在结构特性方面的响应。已根据能量耗散（E _d）评估了玻璃环氧复合材料层压板在承受周期性载荷时的行为变化。）和通过磁滞回线的阻尼系数（DF）。GFRP复合材料样本（UD-0、0 / 30/60 / 0、0 / 45/0 / -45、0 / 90/90/0和0/90/0/90）暴露于低速恒定振幅循环使用实验室装置（通过偏心盘）以4.6 Hz和8.6 Hz频率加载。在除纤维体积分数之外的纤维增强复合材料中，纤维相互作用角会显着影响其负载动态特性。单向（UD-0）层压板的阻尼/能耗低，而纤维相互作用角大的0/90/0/90层压板的阻尼/能耗最高。而对称的交叉层（0/90/90/0）层压板则是所选层压板之间的性能分界。因此，最佳E _dGFRP层压板在动态环境中的/ DF特性归因于对称铺层，铺层顺序中较小的纤维取向相互作用角和边界处的0纤维层。