延期体抗高加速度过载的界面加固性能研究

通过在延期体端面放置纸质垫片的途径来实现界面加固,采用Hopkinson加载试验技术和非线性数值模拟的方法对B/BaCrO4延期体上的应力波传播特性、抗过载界面加固特性进行了研究.研究结果表明:纸垫可以有效地衰减作用到延期体上的应力波,减小延期体的变形量,提高应力/应变分布均匀性,增强延期体的抗过载能力.延期体两个端面加固的效果优于一个端面的加固,应力波输出端加固性能优于应力波输入端加固性能.两端加固的纸垫厚度增加,延期体发生塑性变形的值相对变小.

Study on Boundary Reinforcing Performance of Delay Element for High Acceleration Load

Tissue paper was used to reinforce anti-acceleration at the side of delay element, and the Hopkinson pressure bar technology and non-linear simulation were used to analyze propagation of stress wave and reinforcing performance of boundary to over-load. It was shown that the paper cushion can efficiently attenuate stress wave, decline deformation, smooth distribution of strain/stress and reinforce anti-overload for delay element. Performance of reinforcing at two sides is the best, reinforcing at output side of stress wave is better than that at input side. The thicker of paper cushion at two sides, the less plastic deformation of element.