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Inuence of Foam Filling on Dynamic Response of Hemispherical Shell Subjected to Blast Pressure

Świniarski J., Kowal-Michalska K., Niezgodziński T.

Mechanics and Mechanical Engineering

2013

Vol. 17, nr 2

177--186

The paper aims to investigate the effect of aluminium foam filling of hemispherical steel shell on its dynamic response, accounting for the blast pressure modelling. The considered structures subjected to uniformly distributed pressure, rigidly connected with a steel plate, are considered. True material stress–strain curves for shell and foam filling are assumed in calculations. The problem is solved by FEM using ANSYS software. The time relations of strain energy and effective stresses for different simulations of blast pressure are determined and compared for steel shells and shells filled with aluminum foam.

A Methodology for Assessing Blast Protection in Explosive Ordnance Disposal Bomb Suits

Bass C., Davis M., Rafaels K., Rountree M., Harris R. M., Sanderson E., Andrefsky W., DiMarco G., Zielinski M.

International Journal of Occupational Safety and Ergonomics

2005

Vol. 11, No. 4

347--361

To reduce human casualties associated with explosive ordnance disposal, a wide range of protective wear has been designed to shield against the blast effects of improvised explosive devices and munitions. In this study, 4 commercially available bomb suits, representing a range of materials and armor masses, were evaluated against 0.227 and 0.567 kg of spherical C-4 explosives to determine the level of protection offered to the head, neck, and thorax. A Hybrid III dummy, an instrumented human surrogate [1], was tested with and without protection from the 4 commercially available bomb suits. 20 tests with the dummy torso mounted to simulate a kneeling position were performed to confirm repeatability and robustness of the dummies, as well as to evaluate the 4 suits. Correlations between injury risk assessments based on past human or animal injury model data and various parameters such as bomb suit mass, projected area, and dummy coverage area were drawn.