Dynamic sliding of frictionally held bimaterial interfaces subjected to impact shear loading
Dynamic sliding of frictionally held bimaterial interfaces subjected to impact shear loading
复制标题
承受冲击剪切载荷的摩擦保持双材料界面的动态滑动
DOI：
10.1098/rspa.2006.1703
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
A. Rosakis
中科院分区：
文献类型：
--
作者：
G. Lykotrafitis;A. Rosakis
在微秒的时间尺度上，研究了由铝石和钢板组成的双材料系统沿非相干界面的快速摩擦滑动。板块是由一个静态的均匀压缩的预应力结合在一起，而动态滑动是由不对称的冲击引起的。动态光弹性的全场技术与基于激光干涉测量的局部测速技术同时应用。在对Homalite板施加冲击载荷的情况下，相对于Homalite的膨胀波速沿界面超音速传播的扰动产生了一条剪切马赫线，并穿过p波前。在霍马特岩中，滑动开始于p波锋面后方，并以相对于霍马特岩的超剪切速度传播。观察到一个快速的界面波和一个沿界面传播的褶皱状开孔脉冲（脱离波）。当冲击载荷作用于钢板时，局部滑动速度测量表明，随着纵波阵面到达钢板，滑动开始发生。
The fast frictional sliding along an incoherent interface of a bimaterial system composed of a Homalite and a steel plate is studied experimentally in a microsecond time-scale. The plates are held together by a static uniform compressive pre-stress while dynamic sliding is initiated by asymmetric impact. The full-field technique of dynamic photoelasticity is simultaneously used with a local technique of velocimetry based on laser interferometry. In the case where the impact loading is applied to the Homalite plate, a shear Mach line originates from a disturbance propagating along the interface supersonically with respect to the dilatational wave speed of Homalite and it crosses the P-wave front. The sliding starts well behind the P-wave front in Homalite and it propagates with a supershear speed with respect to Homalite. A fast interface wave and a wrinkle-like opening pulse (detachment wave) travelling along the interface are observed. When the impact loading is applied to the steel plate, the local sliding velocity measurement reveals that sliding initiates with the arrival of the P-wave front in the steel plate.