An Explicit Behavioural Damage Model for the Design of Components in Ceramic Matrix Composites

A behavioral damage model is suggested. The model describes the principal phenomena observed in Ceramic Matrix Composites, namely: initial anisotropy, induced anisotropy, in other words the effects of damage on the elastic behavior, default evolution law, closure effects in relation with residual st...

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Published in:Key engineering materials 1996-11, Vol.127-131, p.1053-1060
Main Authors: Maire, J.F., Lesne, P.M., Girard, R.
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Language:English
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Girard, R.
description A behavioral damage model is suggested. The model describes the principal phenomena observed in Ceramic Matrix Composites, namely: initial anisotropy, induced anisotropy, in other words the effects of damage on the elastic behavior, default evolution law, closure effects in relation with residual strains. A formulation which allows the use of damage variables both related to microcracks oriented by the constituents and microcracks oriented by the loading was developed. It is now known that defects can either be oriented by the microstructure, and therefore expressed by a family of scalar variables, or by the loading, which leds to use tensorial variables. Application is shown to the case of ceramic matirx composites (SiC/SiC) which presents two damage modes and requires to use both scalar and tensorial variables. Emphasis is on the explicit feature of this model which simplifies the parameter identification and the implementation in finite element codes.
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title An Explicit Behavioural Damage Model for the Design of Components in Ceramic Matrix Composites
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