TY - JOUR ID - 72367 TI - Experimental and Numerical Studies on the Characteristics of Simple and Multi-cell Shapes of Quasi-hemisphere Thin-walled Structures JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Parsapour, Masoud AD - Mechainical Engineering Department, Bu Ali Sina University Y1 - 2014 PY - 2014 VL - 27 IS - 8 SP - 1307 EP - 1316 KW - Thin KW - walled structure KW - energy absorber KW - Quasi KW - hemisphere KW - multi KW - cell DO - N2 -  Thin-walled energy absorbers are used to reduce accident induced damages. In this study, thin-walled stainless steel structures in quasi-hemisphere geometry were subjected under quasi-static loading with Santam 150KN apparatus. Experimental results were compared with results of numerical simulations by LS-DYNA and it was shown that there is a good agreement between experimental and numerical results. Also, the multi-cell quasi-hemisphere specimens were numerically investigated and it was presented that increasing the number of cells increases the absorbed energy. The results showed that Six-cell specimen with the largest diameter and the minimum thickness has the most increase of Specific Absorbed Energy (SAE). UR - https://www.ije.ir/article_72367.html L1 - https://www.ije.ir/article_72367_ab28d7200e52310eced303cb220118dd.pdf ER -