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FROM:
M. Parsapour (Mechanical Engineering Department, Bu-Ali Sina University, Hamedan, Iran), “Experimental and numerical studies on the energy absorption characteristics of simple and multi-cell shapes of quasi-hemisphere thin-walled structures”, International Journal of Engineering, Transactions B: Applications, Vol. 27, No. 8, pp 1307-1316, August 2014, DOI: 10.5829/idosi.ije.2014.27.08b.17
ABSTRACT: Energy absorbers are used to reduce accident induced damages. Thin-walled energy absorbers are widely used in modern industries due to their high efficiency and ease of manufacturing. In this study, thin-walled stainless steel structures in quasi-hemisphere geometry were subjected under quasi-static loading using Santam 150KN apparatus. Experimental results were compared with the results of numerical simulations by LS-DYNA and it was shown that there is a good agreement between experimental and numerical results. Two different collapse types in radial and circumferential directions were observed. Also, the multi-cell quasi-hemisphere specimens from 3 to 6 cells were numerically investigated and it is observed that increasing the number of cells increases the absorbed energy. Increasing the thickness of the quasi-hemisphere sample in smaller diameter specimens is more effective. The results showed that Six-cell specimen with the largest diameter and the minimum thickness has the most increase of Specific Absorbed Energy (SAE) with respect to simple section
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