Experimental Study on Dynamic Collision of Graphite Bricks

Under the seismic load or other loads,the collision between graphite bricks which are used as structural components in high temperature gas-cooled reactors（HTGRs） will happen.In order to study the collision behavior of graphite bricks,a collision test apparatus of two large specimens was achieved by a track-type device,and the velocity,the coefficient of restitution and contact time were measured by a high-speed image capturing system and the optical experiment measurement.The relations between kinetic parameters and collision velocities were obtained.The experimental results show that the coefficient of restitution was increased with the rise of the collision velocity,but the contact time was decreased with the rise of the collision velocity.