Analysis and modeling of damage due to thermomechanical coupling of cylindrical multi-materials
type: Dataset
description: A great number of industrial thermo-mechanical systems are facing today transitory regimes with different speeds according to the functioning frequencies. Enhancing their performance imposes the use of new materials of different types; multimaterials is a good example. In fact, these new materials may be constituted of different layers where the layers are associated together in a way to enhance the mechanical and thermal behavior of the system. They may be also constituted of a substrate dressed by a succession of slim layers obtained by thermal projection.In a given system, the constituting materials are generally subject to cyclic thermal or mechanical solicitations. It is very important to know at best their thermomechanical behavior in elastic and plastic regimes. Therefore, the study done during this thesis work, limited here uniquely to periodical solicitations resulting from thermal sources, deals with the evolution of the damage of these materials under multiple forms of thermal fatigue in plastic and elastic functioning regimes.The imposed solicitations are obtained from a periodical thermal source (rectangular, triangular and sinusoidal form). The thermal loss resulting from the convection is also considered. On the mechanical side, the material is considered fixed on one of its extremities and free on the other one (subject to strain). The mechanical stress and strain in the material come essentially from the differences between the coefficients of thermal dilation and the gradient of temperature in the material. The transitory and variable thermal behavior of the material permits to track the evolution and the distribution of the stress and strain in the material.The study of the damage is performed according the given case, either using models directly established from the thermomechanical elastic behavior, or using models that need a thermo-elastoplastic study. In the two cases, and because the majority of damage models (Lemaître and Chaboche) seen in…
landing page: https://theses.hal.science/tel-00977567
identifier: NNT: 2012BELF0174
keyword: charge-cyclique-thermique
keyword: couplage
keyword: coupling
keyword: cycling-thermal-load
keyword: damage
keyword: endommagement
keyword: fatigue-thermique
keyword: infoeu-reposemanticsdoctoralthesis
keyword: multi-material
keyword: multi-materiaux
keyword: spiotherengineering-sciences-physicsother
keyword: thermal-stress
keyword: thermo-elasto-plastic
keyword: thermo-elasto-plastique
keyword: thermo-mechanical
keyword: thermomecanique
keyword: theses
issued: 2026-05-05T15:11:36.503704
modified: 2026-05-05T15:11:36.503709
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Analysis and modeling of damage due to thermomechanical coupling of cylindrical multi-materials
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00977567
issued: 2026-05-05T15:11:36.515694
modified: 2026-05-05T15:11:36.487502