Investigation of High Speed Interfacial Slip Resistance Under Time Varying Normal Pressure and Elevated Temperatures

9622431普拉卡什将研究在不同常压和不同温度下表面的高速剪切变形。根据剪切变形行为确定摩擦力，最终建立界面摩擦本构模型。为了获得互补的数据，将进行两个不同的实验。一种是使用传统的分离式霍普金森杆来模拟在变法向应力作用下接触表面的摩擦。另一种是使用改装的高速撞击装置，其中两个平行板被高速撞击。通过改变撞击速度和板的倾角，法向力和表面牵引力都可以改变。用光学方法测量了切向位移，并用一维波动理论推导了切应力和滑移速度随时间的变化。***

9622431 Prakash A study will be made of the high speed shear deformation of surfaces under varying normal pressures and at various temperatures. From the shear deformation behavior the frictional forces will be determined and it is intended to eventually build a constitutive model for interfacial friction. Two different experiments will be performed to obtain complementary data. One uses a conventional split Hopkinson bar to simulate rubbing of surfaces in contact under varying normal stress. The other uses a modified high speed impact apparatus where two parallel plates are impacted at high speed. By varying the speed of impact and the inclination of the plates, both normal forces and surface traction forces can be varied. Tangential displacements are measured optically and are used to with one-dimensional wave theory to derive variations of shear stress and slip velocity with time. ***