%0 Journal Article %T Ductile damage and fragmentation of highly porous gamma-alumina under multi-point crushing %+ IFP Energies nouvelles (IFPEN) %+ Institut National des Sciences Appliquées de Lyon (INSA Lyon) %A Le Corre, Vincent %A Jolivet, Lina %A Mathevet, Soline %A Bobin, Carole %A Sylvain, Meille %< avec comité de lecture %@ 0272-8842 %J Ceramics International %I Elsevier %V 46 %N 16 %P 25584-25592 %8 2020-11 %D 2020 %R 10.1016/j.ceramint.2020.07.030 %K Porous ceramics %K yield strength %K fragmentation pattern %K fractography %K Finite Element model %K Drucker-Prager criterion %Z Chemical SciencesJournal articles %X Mechanical behavior of highly porous alumina catalytic supports is investigated through a non-conventional approach consisting in a multi-point crushing of individual cylindrical extrudates. A ductile behavior characterized by irreversible deformation and fragmentation phenomena is observed and pointed out by experimental load-displacement curves. SEM fractographies of the fragments collected after the tests confirm the presence of dense micro-cracking and of local deformations under contact zones. A Finite Element analysis of the test shows that a Drucker-Prager strength criterion associated with a perfectly plastic flow rule mimics the global damageable behavior of the specimen under the multi-point crushing test. A correlation is proposed between the evolution of the mass of fine fragments and the plastic energy dissipation. %G English %2 https://ifp.hal.science/hal-03002067/document %2 https://ifp.hal.science/hal-03002067/file/Ductile%20Damage%20and%20Fragmentation.pdf %L hal-03002067 %U https://ifp.hal.science/hal-03002067 %~ IFP %~ INSA-LYON %~ INSA-GROUPE %~ UDL