We developed and improved constitutive model, using LS-DYNA second development technology to embed a damaged Johnson-Cook constitutive model of commercial finite element software.Detailed description of structure of iterative algorithm and calculation process are presented. For experiments of perforation of 12 mm thick steel plates by 20 mm diameter projectiles with flat and conical noses, numerical simulations are carried out. Calculation and experiment results are consistent well. It indicates that constitutive algorithm, containing damage constitutive model and damage evolution equation are reasonable and reliable.

A Monte Carlo simulation code has been written for heavy-ion induced fission at sub-barrier energies with a simple model. The final properties of the heavy fragmemts such as mass, charge, energy, angular distribution and angular correlation have been simulated for complete fusion-fission and transfer-fission. The angles and velocities of the fragments relative to the recoil direction are given in the laboratory system. Consideration covers the combined kinematic effects of the distributions in mass energy and angular for the heavy fragments and pre-scission, post-scission neutron emission. The code can be used as a tool for experiment planning and analysis.