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- W1570885750 abstract "The non-linear behavior of CMCs mainly comes from the combination of two damage mechanisms: matrix microcracking and fiber-matrix debonding. Matrix microcracking induces a loss of stiffness. Mode II cracking leads to the opening of the transverse cracks. The identification of the micromechanical parameters governing these phenomena is of prime importance for modeling the behavior of these composites. Because wave speed measurements give access to the value of every elastic constants of a material, it is possible to know which coefficients are affected during the damage process and to know the elastic part of the material behavior only. The formulation and identification of 3D constitutive laws for ceramic matrix composites is then simplified and more accurate. Actually, our work to day has shown that one internal variable only is necessary to describe the behavior of CMCs: the crack density. The simplicity of our models is mainly due to the use of the ultrasonic evaluation that allows to identify the microcracks systems through the variation of the elasticity tensor and thus to study precisely the relative part of the inelastic strain. This has given us some highlights on the unilateral effect and has allowed us to measure in situ the interfacial sliding stress." @default.
- W1570885750 created "2016-06-24" @default.
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- W1570885750 date "2001-10-12" @default.
- W1570885750 modified "2023-09-25" @default.
- W1570885750 title "Ultrasounds: An Essential Tool for Studying the Mechanical Behavior of CMCs" @default.
- W1570885750 doi "https://doi.org/10.1002/3527605622.ch70" @default.
- W1570885750 hasPublicationYear "2001" @default.
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