Numerical analysis of metallic foam using microstructure model

Wu, C; Yu, L; Zhou, Y

Numerical analysis of metallic foam using microstructure model

Wu, C

Yu, L Zhou, Y

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Publication Type:: Journal Article
Citation:: International Journal of Protective Structures, 2011, 2 (4), pp. 499 - 514
Issue Date:: 2011-12-01

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Field	Value	Language
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934	en_US
dc.contributor.author	Yu, L	en_US
dc.contributor.author	Zhou, Y	en_US
dc.date.issued	2011-12-01	en_US
dc.identifier.citation	International Journal of Protective Structures, 2011, 2 (4), pp. 499 - 514	en_US
dc.identifier.issn	2041-4196	en_US
dc.identifier.uri	http://hdl.handle.net/10453/118536
dc.description.abstract	It has become a critical issue that the human life and civil facility have been threatened by the increasing terroristic explosive attack. The application of cellular materials is an effective and feasible measure to mitigate blast and impact loading on buildings due to their energy absorption capacity. The Finite Element code such as LSDYNA has been used to simulate the mechanical behaviours of cellular materials. However, most of numerical models regarded the cellular materials as homogeneous materials on the macro level which may affect the accuracy of simulation, because none of them can reflect the pore structure of cellular materials, especially for the irregular metallic foam structures. Therefore, in this study, two main microstructure models (2D/3D metallic foam) were developed for numerical simulation of closed-cell metal. In the microstructure model of metallic foam, the cell walls were represented by thin shell elements and the solid wall material of the cells is modelled as bi-linear stressstrain relationship based on the material properties of the cell wall material of metallic foam. The numerical models were validated through comparing simulated results with analytical values of plateau phase stress-strain response under static condition. With the validated microstructure models, a series of parametric studies were conducted, in order to have a better understanding about the mechanical properties of closed-cell metallic foam. The emphases of this study were on the differences between static and dynamic performances of closed-cell metallic foam specimens in both 2D and 3D cases, the relationship between dynamic increase factor and nominal strain rate. © Multi-Science Publishing.	en_US
dc.relation.ispartof	International Journal of Protective Structures	en_US
dc.relation.isbasedon	10.1260/2041-4196.2.4.499	en_US
dc.title	Numerical analysis of metallic foam using microstructure model	en_US
dc.type	Journal Article
utslib.citation.volume	4	en_US
utslib.citation.volume	2	en_US
utslib.for	0905 Civil Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.issue	4	en_US
pubs.publication-status	Published	en_US
pubs.volume	2	en_US

Abstract:

It has become a critical issue that the human life and civil facility have been threatened by the increasing terroristic explosive attack. The application of cellular materials is an effective and feasible measure to mitigate blast and impact loading on buildings due to their energy absorption capacity. The Finite Element code such as LSDYNA has been used to simulate the mechanical behaviours of cellular materials. However, most of numerical models regarded the cellular materials as homogeneous materials on the macro level which may affect the accuracy of simulation, because none of them can reflect the pore structure of cellular materials, especially for the irregular metallic foam structures. Therefore, in this study, two main microstructure models (2D/3D metallic foam) were developed for numerical simulation of closed-cell metal. In the microstructure model of metallic foam, the cell walls were represented by thin shell elements and the solid wall material of the cells is modelled as bi-linear stressstrain relationship based on the material properties of the cell wall material of metallic foam. The numerical models were validated through comparing simulated results with analytical values of plateau phase stress-strain response under static condition. With the validated microstructure models, a series of parametric studies were conducted, in order to have a better understanding about the mechanical properties of closed-cell metallic foam. The emphases of this study were on the differences between static and dynamic performances of closed-cell metallic foam specimens in both 2D and 3D cases, the relationship between dynamic increase factor and nominal strain rate. © Multi-Science Publishing.

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http://hdl.handle.net/10453/118536