HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Ductile damage and fragmentation of highly porous gamma-alumina under multi-point crushing

Abstract : 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.
Document type :
Journal articles
Complete list of metadata

Contributor : Catherine Belli Connect in order to contact the contributor
Submitted on : Thursday, November 12, 2020 - 4:26:50 PM
Last modification on : Friday, December 4, 2020 - 3:22:56 AM
Long-term archiving on: : Saturday, February 13, 2021 - 8:02:55 PM


 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2022-07-08

Please log in to resquest access to the document




Vincent Le Corre, Lina Jolivet, Soline Mathevet, Carole Bobin, Meille Sylvain. Ductile damage and fragmentation of highly porous gamma-alumina under multi-point crushing. Ceramics International, Elsevier, 2020, 46 (16), pp.25584-25592. ⟨10.1016/j.ceramint.2020.07.030⟩. ⟨hal-03002067⟩



Record views