Abstract
The dynamic stresses in the materials having various assumed properties caused by detonative loading are computed by using the numerical technique which involves the finite difference in approximation to the equation of motion in the Lagrangian coordinate system, and then, the patterns of the breakage around the explosion, and the behaviour of the stress waves projected into the materials are discussed by referring the results to the above mentioned stress analysis.
Concerning the pattern of the breakage around the spherical explosion, it is concluded that the yield zone or shear failure zone is produced in close proximity to an explosion, and this zone is surrounded by the tensile fracture zone consisting of the radial cracks. Finally, the patterns of the breakage of the mild steel and the plexiglass (PMMA) subjected by detonative loading are presented, and it is pointed out that these are explained fairly well by the results of the above mentioned numerical analysis.
