Análisis Computacional y Experimental de la Respuesta de Placas Metálicas Sometidas a Cargas Explosivas

Abstract

The main objective of this paper is to determine the dynamic response of steel plates subjected to impulsive loads originated by explosions. The dynamic loads of short duration often exhibit high space and temporal variations producing severe gradients of stress in the structure. These high rates of deformation also affect the resistance and ductility of the materials and the global structure, as well as the failure modes.
In the experimental program, two unstiffened metallic plates were tested, with different boundary conditions: one clamped on the floor and another clamped on the four edges. The time variation of the acceleration of both plates in different points was registered as well as the incident pressure on the plates. On the other hand, a dynamic computational linear analysis of the plates was carried out, with ABAQUS and COSMOS/M. A dynamic nonlinear analysis of the first plate was perform, taking into account the geometric nonlinearity involved in the problem.
Comparing the numerical and experimental results, important recommendations arise for the modelling of the phenomenon of impulsive loads.