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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.
https://hal-ifp.archives-ouvertes.fr/hal-03002067
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
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