【摘要】 利用结构的塑性变形原理研制的各种能量耗散装置对于减少车船碰撞事故的损失可以起到重大作用,因而近年来在许多国家受到很大重视.本文通过静、动力实验和塑性理论分析,研究了金属薄壁方管在轴向力作用下产生“开裂与卷曲”破坏模式的机理和规律,阐明了这种能量耗散装置具备行程长和承载能力稳定等优点,有良好的应用前景.更多还原

【Abstract】 A passive energy dissipating device that limits transmitted impact forces by fracture and plastic deformation is studied. In this device, metal tubes are split axially and deformed plastically by passage of a mandrel through the tube. Experiments on both dural and mild steel square tubes have been used to examine the relative energy dissipated in fracture, plastic deformation and friction. The device is shown to be an efficient element for an energy dissipation system requiring a long stroke-to-length ratio and good specific energy dissipation.更多还原