Abstract
A model is proposed for predicting the non-linear stress-strain relations and ultimate failure of microcomposite specimens as a function of interfacial characteristics. The description of the matrix cracking process and fiber failure is based on fracture statistics. The microcomposite specimen consists of a single fiber coated with concentric layers of interfacial material and matrix. It is representative of the constituents in the actual composite and is appropriate for designing interphases.
This approach was applied to practical SiC/SiC microcomposites specimens made by Chemical Vapor Deposition. The predictions of matrix cracking compare satisfactorily with experimental data. Important trends in the influence of interfaces upon the stress-strain behavior are thus predicted and discussed in relation to available experimental results. kw]Key words kw]ceramic-matrix composites kw]microcomposites kw]tensile behavior kw]matrix fragmentation kw]fracture statistics kw]failure kw]interfaces
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Guillaumat, L., Lamon, J. Fracture statistics applied to modelling the non-linear stress-strain behavior in microcomposites: Influence of interfacial parameters. Int J Fract 82, 297–316 (1996). https://doi.org/10.1007/BF00013235
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DOI: https://doi.org/10.1007/BF00013235