Information Technology Reference
In-Depth Information
that some cells exhibit premature collapse due to morphological effect and com-
plex load distribution, and both bending and buckling occur in the walls of the
'weak' cells having various shapes and sizes. The finite element simulation based
on the real cell structure extracted from CT images predicts the stress-strain curve
and cell deformation in a reasonable agreement. The numerical prediction can be
improved by developing a more reliable material model for the cell walls and
reducing numerical errors associated with the meshing. The simulation indicates
that significant local yielding occurs well before the plateau regime is reached.
Acknowledgments The authors would like to acknowledge the assistance given by the IT
Services and the use of the Computational Shared Facility at The University of Manchester. The
supports from the Engineering and Physical Science Research Council (EPSRC) grants EP/
F007906/1 and EP/F028431/1 and Royal Society grant JP100958 are also acknowledged. The
first author is grateful for the PhD scholarship from the School of Mechanical, Aerospace and
Civil Engineering, The University of Manchester.
References
1. Gibson L.J., Ashby, M.F.: Cellular Solids: Structure and Properties. Cambridge University
Press, Cambridge (1997)
2. Ashby, M.F., Evans, A.G., et al.:(2000) Metal Foams: a Design Guide. Elsevier, Netherlands
3. Maire, E., Babout, L., et al.: Recent results on 3D characterisation of microstructure and
damage of metal matrix composites and a metallic foam using X-ray tomography. Mater. Sci.
Eng. A 319-321, 216-219 (2001)
4. McDonald, S.A., Mummery, P.M., et al.: Characterization of the three-dimensional structure
of a metallic foam during compressive deformation. J. Microsc. 223(2), 150-158 (2006)
5. Young, P.G., Beresford-West, T.B.H., et al.: An efficient approach to converting three-
dimensional image data into highly accurate computational models. Philos. Trans. R. Soc. A:
Math. Phys. Eng. Sci. 366(1878), 3155-3173 (2008)
6. Jeon, I., Asahina, T., et al.: Finite element simulation of the plastic collapse of closed-cell
aluminum foams with X-ray computed tomography. Mech. Mater. 42(3), 227-236 (2010)
7. Vesenjak, M., Veyhl, C., et al.: Analysis of anisotropy and strain rate sensitivity of open-cell
metal foam. Mater. Sci. Eng. A 541, 105-109 (2012)
8. Jeon, I., Katou, K., et al.: Cell wall mechanical properties of closed-cell Al foam. Mech.
Mater. 41(1), 60-73 (2009)
9. Andrews, E., Sanders, W., et al.: Compressive and tensile behaviour of aluminum foams.
Mater. Sci. Eng. A 270(2), 113-124 (1999)
10. Simone, A.E., Gibson, L.J.: Aluminum foams produced by liquid-state processes. Acta
Mater. 46(9), 3109-3123 (1998)
11. Bart-Smith, H., Bastawros, A.F., et al.: Compressive deformation and yielding mechanisms
in cellular Al alloys determined using X-ray tomography and surface strain mapping. Acta
Mater. 46(10), 3583-3592 (1998)
Search WWH ::
Custom Search