Evaluation Of Effect Of Blast Loads On elements Of Machines And Metal Structures

Abstract

The article presents a new study in a research field that has rarely been researched in the mechanical engineering community, which is the field of explosions and their impact on machines and metal structures and their elements. It represents a simple first step in this field that must be followed by subsequent steps to expand information and knowledge in it; This study was launched from a previous reference study within the field of civil engineering, on the study of the response and behavior of mixed columns subjected to an explosive load (a metal column with an H-section surrounded by cement and longitudinal and transverse reinforcing bars). The researcher re-modeled a mixed column similar to the model in the reference study. using (LS-DYNA) program, and then started making adjustments to some variables of the model, conducting the necessary analyzes and the impact of These variables were applied to the metal column. where the concrete casing and the reinforcing bars were removed and only the metal column was left and exposed to the same previous explosive load, then the comparison between the concrete-covered metal column with the non-covered metal column, and changing the value of the blast load which affected  to the metal column, to reach The effect of the presence of concrete as a material surrounding the metal columns, where the researcher concluded that the concrete absorbs the bulk of the energy of the blasting and thus reduces the structural damage to the metal column by a very large percentage, as it provided support for the metal column about twice in view of the total deformation or curvature of the column, and provided support about 10 times in view of the fragmentation or local deformation of the column.