Ballistic Impact between a Blunt Elastic Projectile and an Elastic-Plastic Plate.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
Pagination or Media Count:
A cylindrical rod on rod impact model is developed that allows for linear elastic strains in the projectile and linear elastic-plastic strains in the target plug. Application is made to the plate impact problem. Normal incidence impact of two circular cylinders is considered. One-dimensional stress waves load the projectile and the plug in compression and tension. Stress wave interactions are tracked in the projectile and in the plug. Momentum balance is used to solve for resultant stresses and particle velocities. Optimum conditions are determined for the initial impact that allow the plug to be accelerated uniformly to the initial projectile velocity. Optimum plug lengthprojectile length ratio is found to decrease with increasing projectile initial velocity. Separation of the projectile and plug is predicted and separation times are determined.