This study investigates the large deformation bending properties of a single-ply fabric reinforced polymer composite (SpFRPC) by the innovative counterweight balanced column bending test (CWB-CBT) and microscopic analysis. The influences of temperatures and asymmetric weave structure on SpFRPC's bending properties are emphasized. In glassy state at 15°C, SpFRPC failed in a brittle manner, with the ultimate moment and initial bending stiffness per width 19.16 Nmm and 448.61 Nmm². The bending capacity decreased to negligible at 40°C in the rubbery state but vice versa for deformability, reaching the curvature of 0.135 mm⁻¹ within maximum accommodation of this CWB-CBT fixture. The asymmetric weave structure enabled larger deformability when bent outward than inward, resulting in more significant stiffness and ultimate moment inward than outward. The transverse yarns' gaps were the weak locations of bending fracture, especially at weave intersection edges. In general, the present work provides an exploratory study for understanding the folding mechanical properties of the SpFRPC.

中文翻译：

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单层织物增强聚合物复合材料的大变形弯曲

本研究通过创新的配重平衡柱弯曲试验 (CWB-CBT) 和显微分析研究了单层织物增强聚合物复合材料 (SpFRPC) 的大变形弯曲性能。强调了温度和不对称编织结构对 SpFRPC 弯曲性能的影响。在 15°C 的玻璃态下，SpFRPC 以脆性方式失效，单位宽度的极限力矩和初始弯曲刚度分别为 19.16 Nmm 和 448.61 Nmm ²。在橡胶状态下，弯曲能力在 40°C 时降低到可以忽略不计，反之则变形，曲率达到 0.135 mm ^-1在此 CWB-CBT 装置的最大容纳范围内。不对称编织结构在向外弯曲时比向内弯曲时具有更大的变形能力，从而导致向内比向外弯曲更显着的刚度和极限力矩。横向纱线的间隙是弯曲断裂的薄弱部位，特别是在编织交叉边缘处。总的来说，目前的工作为理解 SpFRPC 的折叠机械性能提供了探索性研究。