Abstract
A set of analytical models based on engineering beam analysis is developed to predict creep behavior of cellular materials over a broad range of relative density. Model predictions, which take into account the presence of mass at strut nodes and consider different possible deformation mechanisms and foam architectures, are compared to experimental creep results for a replicated nickel-base foam and a reticulated aluminum foam. As porosity decreases, the controlling creep mechanism in the foams changes from strut bending, to strut shearing, and ultimately to strut compression.
Original language | English (US) |
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Pages (from-to) | 1373-1384 |
Number of pages | 12 |
Journal | Acta Materialia |
Volume | 57 |
Issue number | 5 |
DOIs | |
State | Published - Mar 2009 |
Funding
The authors acknowledge Dr. P.D. Jablonski (NETL) for supplying the J5 alloy, and Dr. R. Bhat (GE Global Research Center), Dr. J.D. DeFouw, and J.A. Scott (Northwestern University) for useful discussions. This research was supported by NASA through a subcontract from the General Electric Company (award NNC06CB31C). Y.B. also acknowledges Chulalongkorn University for the Grant for Development of New Faculty Staff (1/2008).
Keywords
- Creep
- Foams
- Metallic foams
- Porous materials
- Sponges
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys