Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Repeated localized impulsive loading on monolithic and multi-layered metallic plates
Abstract The objective of the current study is to numerically investigate the effect of repeated localized impulsive loading on the performance and dynamic plastic response of monolithic and multi-layered circular plate configurations made of either high- and low-strength aluminum or steel or a combination of these materials in the impulse range of 12.5–30 N s. For this, several numerical models were developed using ABAQUS/Explicit commercial FEM software via a FORTRAN subroutine VDLOAD in combination with the Johnson-Cook thermoviscoplastic constitutive relation, as well as the Johnson-Cook damage model. In order to validate the numerical models, the available experimental results on monolithic and multi-layered plate configurations under single localized load were used. Afterward, 18 different numerical models and 96 various cases including monolithic, double- and triple-layered plate configurations with an equivalent areal density subjected to five consecutive loads, were employed. The numerical simulation results indicated that a double-layered mixed configuration with a thin back steel layer and a thick front aluminum layer performs better compared to other configurations made of similar and dissimilar materials at higher impulses subjected to multiple impulsive loading, particularly while steel and aluminum materials have lower strength.
Highlights Performance of monolithic and multi-layered metallic plates was investigated under multiple impulsive loading. For similar materials, a monolithic plate exhibits a better performance compared to a multi-layered plate configuration. At higher impulses, a double-layered mixed configuration exhibits the best performance compared to other configurations considered. The best double-layered mixed configuration consisted of a thin back steel layer and a thick front aluminum layer.
Repeated localized impulsive loading on monolithic and multi-layered metallic plates
Abstract The objective of the current study is to numerically investigate the effect of repeated localized impulsive loading on the performance and dynamic plastic response of monolithic and multi-layered circular plate configurations made of either high- and low-strength aluminum or steel or a combination of these materials in the impulse range of 12.5–30 N s. For this, several numerical models were developed using ABAQUS/Explicit commercial FEM software via a FORTRAN subroutine VDLOAD in combination with the Johnson-Cook thermoviscoplastic constitutive relation, as well as the Johnson-Cook damage model. In order to validate the numerical models, the available experimental results on monolithic and multi-layered plate configurations under single localized load were used. Afterward, 18 different numerical models and 96 various cases including monolithic, double- and triple-layered plate configurations with an equivalent areal density subjected to five consecutive loads, were employed. The numerical simulation results indicated that a double-layered mixed configuration with a thin back steel layer and a thick front aluminum layer performs better compared to other configurations made of similar and dissimilar materials at higher impulses subjected to multiple impulsive loading, particularly while steel and aluminum materials have lower strength.
Highlights Performance of monolithic and multi-layered metallic plates was investigated under multiple impulsive loading. For similar materials, a monolithic plate exhibits a better performance compared to a multi-layered plate configuration. At higher impulses, a double-layered mixed configuration exhibits the best performance compared to other configurations considered. The best double-layered mixed configuration consisted of a thin back steel layer and a thick front aluminum layer.
Repeated localized impulsive loading on monolithic and multi-layered metallic plates
Rezasefat, Mohammad (Autor:in) / Mirzababaie Mostofi, Tohid (Autor:in) / Ozbakkaloglu, Togay (Autor:in)
Thin-Walled Structures ; 144
24.07.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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