在这项研究中,用实验方法研究了平行于试样轴线的钢棒横向压痕作用下复合管的耐撞性和能量吸收能力。关键参数,如管直径,长度,壁厚,系统检查和比较压头直径。此外,严格分析了聚氨酯泡沫填料对损伤模式和能量吸收能力的影响。与传统发现相反,填充有泡沫的较小直径的标本表现出优于其较大的对应物的能量吸收,主要是由于泡沫体积的增强压缩。实验结果揭示了复合试样中损伤机制的复杂相互作用,包括基体开裂,纤维断裂,泡沫破碎,泡沫致密化,泡沫断裂,和复合层的脱粘,都有助于增强能量吸收。增加管厚度,长度,和压头直径,随着管直径的减小,与更高的接触力和改善的能量吸收相关。促进了更平滑的壳断裂,泡沫填料的存在增强了整体能量吸收能力。这项研究为复合管的结构响应和耐撞性提供了宝贵的见解,这对于优化各种工程应用的设计至关重要。
In this study, the crashworthiness behavior and energy absorption capacity of composite tubes under lateral indentation by steel rods aligned parallel to the specimen axis are investigated using experimental methods. Key parameters such as tube diameter, length, wall thickness, and indenter diameter are systematically examined and compared. Additionally, the influence of polyurethane foam fillers on damage modes and energy absorption capacity is rigorously analyzed. Contrary to conventional findings, smaller diameter specimens filled with foam demonstrate superior energy absorption compared to their larger counterparts, primarily due to enhanced compression of the foam volume. Experimental results reveal a complex interplay of damage mechanisms in composite specimens, including matrix cracking, fiber breakage, foam crushing, foam densification, foam fracture, and debonding of composite layers, all contributing to enhanced energy absorption. Increased tube thickness, length, and indenter diameter, alongside decreased tube diameter, are correlated with higher contact forces and improved energy absorption. Smoother shell fractures are promoted, and overall energy absorption capabilities are enhanced by the presence of foam fillers. This investigation provides valuable insights into the structural response and crashworthiness of composite tubes, which is essential for optimizing their design across various engineering applications.