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Download Cellular Ceramics by Michael Scheffler, Paolo Colombo PDF

By Michael Scheffler, Paolo Colombo

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2 3 4 5 6 7 8 9 10 1959, 1, 107. , Finnie, I. J. Mater. F. , Cambridge University Press, Cambridge, UK, 1997. G. , 2000. Banhart, J. ) Metallschäume, MIT Verlag, Bremen, Germany, 1997. A. ) Metal Foams and Foam Metal Structures, Proc. Int. Conf. Metfoam ’99, MIT Verlag, Bremen, Germany, 1999. A. ) Metal Foams and Foam Metal Structures, Proc. Int. Conf. Metfoam ’01, MIT Verlag, Bremen, Germany, 2001. A. (Eds), Metal Foams and Foam Metal Structures, Proc. Int. Conf. Metfoam ’03, MIT Verlag, Bremen, Germany, 2003.

3. Elastomeric foams collapse not by yielding but by elastic buckling, and brittle foams by cell-wall fracture (Figs. 7 and 8). As with plastic collapse, simple scaling laws describe this behavior well. A strut of length L buckles under a compressive load Fb, the Euler buckling load, where Fb µ Es I 2 L 4 µ Es t L 2 . (6) Since F = rF2, the stress that causes the foam to collapse by elastic buckling r~el scales as  2 ~ r~el µ (buckling-dominated behavior). 05. Cell walls fracture when the bending moment exceeds that given by Eq.

At the yield stress, topological changes occur and the plastic regime is entered. Finally, the topological changes lead to flow. Beyond this simple and well-understood picture, much remains to be explored as regards strain-rate-dependent effects, localization of shear (shear banding), and so on. Further details can be found in a review [26] and recent references [27–30]. 5 Beyond Quasistatics To understand the role of viscosity, for example, or the effects of combinations of the above processes, we must progress beyond the quasistatic picture.

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