PREDICTION OF RESIDUAL STRESS IN EXPLOSIVE MELT CASTING

Abstract

The production of energetic materials, particularly fusible explosives, has garnered significant attention in both military and civilian spheres. This report delves into the challenges and advancements in the melt-casting process, focusing on Composition B, a blend of RDX, TNT, and a wax desensitizer. By employing a two-dimensional thermal-solid mechanics mathematical model on Comsol Multiphysics, the effects of varying surrounding conditions and mould geometry on the final material properties are investigated. Through numerical analysis, critical defects thermal stresses are identified, attributing them to factors like poor solidification rate and improper mould design. By controlling the solidification rate and introducing directional solidification techniques, these defects are mitigated, leading to improved final material properties. The findings underscore the importance of precise cooling conditions and mould geometry in ensuring the safety and effectiveness of energetic materials in various applications.