تقييم تأثير الحمولات الانفجارية على العناصر المعدنية

الملخص EN

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 the metallic elements of machines and constructions.

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 and exposed it to the same explosive load.

one of the most important modeling and simulation programs that uses the finite element method, which is the (LS-DYNA) program, was used, and the results were close to the results of the reference study.

then modifications were made to some of the model's variables and properties, and the necessary analyzes were conducted and the results were extracted and the impact of these variables on the metallic column was shown.

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 it was compared between the concrete-covered metal column with the non-covered metal column.

then the value of the blast load that affected to the metal column was changed, to reach the effect of the presence of concrete as a material surrounding the metal columns.

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.

where the total bending in the concrete-covered metal column was decreased to 50% compared to the non-covered metal column, and the local deformation in the concrete-covered metal column was decreased to 10% compared to the non-covered metal column.