Please have a look at the attached image. The two blue plates (rigid) are bolted to a red plate. Now an object with 10000 J of Kinetic energy hits the red plate and the red plate is deformed by 4 mm in the direction of energy. Due to this collision, the bolts encounter a shear stress. Can someone help me in finding the relationship between the kinetic energy and the shear stress? One possibility is, since the maximum deformation of the red plate is 4 mm by Stiffness = Force/deflection relationship, knowing the stiffness of the red plate, the force acting on the plate can be calculated. However, the ontained force values seem unrealistic. I wish that someone confirms this procedure. Regards.