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Investigations on the influence of spherical caps in the axial impact characteristics of press-formed cylindrical tubular structures
Praveen Kumar A.a, Jusuf A.b, Santosa S.P.b, Dirgantara T.b
a Department of Mechanical Engineering, CMR Technical Campus, Hyderabad, India
b Lightweight Structures Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© The Author(s) 2019.Thin-walled cylindrical tubes are generally used as energy absorbers in frontal safety structures of the modern vehicle since they provide effective crash performance and excellent energy absorption characteristics. Nevertheless, these tubes often exhibit high initial peak force under impact, which in turn cause severe injury to the occupants. This article aims to investigate the effectiveness of combining shallow and hemispherical caps over the cylindrical segment to reduce the initial peak crushing force of a conventional cylindrical tube under impact loading conditions. Through finite element crash simulations, the influence of spherical caps on the initial peak crushing force and energy absorption characteristics of combined geometry cylindrical tubes were evaluated and validated with impact experiments. The crashworthiness characteristics of the proposed combined geometry tubes were compared with the conventional cylindrical tubes and a substantial reduction of about 25%–45% in the initial peak crushing force was perceived without compromising the energy absorption capacity. The overall outcomes revealed that the press-formed combined geometry cylindrical tubes could be used as an energy absorbing structure in vehicles applicable to a wide range of impact velocities.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Absorption characteristics,Energy absorbing structure,Energy absorption capacity,Geometry structure,LS-DYNA,Passive safety,Substantial reduction,Tubular structures[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]combined geometry structures,crashworthiness,forming effects,LS-DYNA,passive safety[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1177/1369433218819576[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]