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2009
ACL
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I.Pozdnyakova, G.Bruno, A.M.Efremov, B.Clausen, D.Hughes, 'Stress-Dependent Elastic Properties of Porous Microcracked Ceramics (p NA)', Adv. Eng. Mater. 11 1023-1029 (2009) doi:10.1002/adem.200900192
The nonlinear elastic response in porous cellular microcracked ceramics was observed. It is shown that in microcracked materials two processes, namely stiffening and softening, always compete when a compressive external load is applied. The first regime is attributed to microcrack closure, and the second to microcracks opening, i.e., to a damage introduced by the applied stress
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