Influence of fibre properties on the mechanical behaviour of unidirectionally-reinforced ceramic matrix composites

Paar, Rinaldo; Vallés, J. L.; Dänzer, Robert

doi:10.1016/s0921-5093(98)00593-0

Cited by 23 publications

(6 citation statements)

References 15 publications

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“…Finally, to take account of the distance between aggregates, Δ ag , and the size of the aggregates, R ag , the radius of the polymer shell surrounding the aggregates, R s , can be determined according to the following relationship: In a recent work, Paar et al35 have also introduced the outer radius of the matrix shell, R s , into the modeling of the mechanical behavior of unidirectionally reinforced ceramic matrix composites. Values of R s are reported in Table V.…”

Section: Resultsmentioning

confidence: 99%

Multiscale morphological analysis of commingled PP/unidirectional glass fiber composites: Experiment and theory

Dubouloz-Monnet

Mélé

Albérola

2005

J of Applied Polymer Sci

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Quantitative 2D image processing has been performed to assess the morphology of commingled polypropylene composites reinforced by a range of glass fiber contents. Quantitative morphological probes, derived from both local and global analyses, point out the heterogeneous dispersion of unidirectional fibers within the polymer matrix, i.e., the presence of aggregates. It is found that more than 86% of fibers are packed into aggregates at a maximum packing fraction of 0.84 whatever the filler content. Moreover, accounting for these morphological characteristics and based on the percolation concept, prediction of the morphology behavior of such composites is proposed. A good agreement between theory and experiment is found.

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Section: Resultsmentioning

confidence: 99%

Multiscale morphological analysis of commingled PP/unidirectional glass fiber composites: Experiment and theory

Dubouloz-Monnet

Mélé

Albérola

2005

J of Applied Polymer Sci

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“…The GLS assumption neglects any local stress concentrations in the neighborhood of existing breaks and is expected to be accurate in the cases of great debonded lengths of fiber/matrix interface. Various models that include the GLS criterion explicitly have been developed [27,[33][34][35][36][37][38][39][40][41][42]. The LLS criterion assumes that the load from a broken fiber is transferred to the neighboring intact fibers and is expected to be accurate when the fiber/matrix interfacial shear stress is sufficiently high.…”

Section: Fiber Failurementioning

confidence: 99%

Modeling the Tensile Behavior of Cross-Ply C/SiC Ceramic-Matrix Composites

Song

Sun

2015

Mech Compos Mater

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The tensile behavior of cross-ply C/SiC ceramic-matrix composites (CMCs) at room temperature has been investigated. Under tensile loading, the damage evolution process was observed with an optical microscope. A micromechanical approach was developed to predict the tensile stress-strain curve, which considers the damage mechanisms of transverse multicracking, matrix multicracking, fiber/matrix interface debonding, and fiber fracture. The shear-lag model was used to describe the microstress field of the damaged composite. By combining the shear-lag model with different damage models, the tensile stress-strain curve of cross-ply CMCs corresponding to each damage stage was modeled. The predicted tensile stress-strain curves of cross-ply C/ SiC composites agreed with experimental data.

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“…The GLS assumption neglects any local stress concentration in the neighborhood of existing breaks, and is expected to be accurate when the interface shear stress is sufficiently low. Models that include GLS explicitly have been developed, including Thouless and Evans [21], Cao and Thouless [22], Sutcu [23], Schwietert and Steif [24], Curtin [25], Weitsman and Zhu [26], Hild et al [27], Zhu and Weitsman [15], Curtin et al [28], Paar et al [29], Liao and Reifsnider [30], et al The LLS assumes that the load from broken fibers is transferred to neighborhood intact fibers, and is expected to be accurate when the interface shear stress is sufficiently high. Models that include LLS explicitly have been developed, which includes Zhou and Curtin [31], Dutton et al [32], Xia and Curtin [33], et al…”

Section: Fibers Failurementioning

confidence: 99%

Micromechanical Modeling for Tensile Behaviour of Carbon Fiber − Reinforced Ceramic − Matrix Composites

2015

Appl Compos Mater

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The stress-strain curves of fiber − reinforced ceramic − matrix composites (CMCs) exhibit obvious non-linear behaviour under tensile loading. The occurrence of multiple damage mechanisms, i.e., matrix multicracking, fiber/matrix interface debonding and fibers fracture, is the mainly reason for the non-linear characteristic. The micromechanics approach has been developed to predict the tensile stress-strain curves of unidirectional, cross-ply and woven CMCs. The shear-lag model was used to describe the micro stress field of the damaged composite. The damage models were used to determine the evolution of micro damage parameters, i.e., matrix crack spacing, interface debonded length and broken fibers fraction. By combining the shear-lag model with damage models and considering the effect of transverse multicracking in the 90°plies or transverse yarns in cross-ply or woven CMCs, the tensile stress-strain curves of unidirectional, cross-ply, 2D and 2.5D woven CMCs have been predicted. The results agreed with experimental data.

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Influence of fibre properties on the mechanical behaviour of unidirectionally-reinforced ceramic matrix composites

Cited by 23 publications

References 15 publications

Multiscale morphological analysis of commingled PP/unidirectional glass fiber composites: Experiment and theory

Multiscale morphological analysis of commingled PP/unidirectional glass fiber composites: Experiment and theory

Modeling the Tensile Behavior of Cross-Ply C/SiC Ceramic-Matrix Composites

Micromechanical Modeling for Tensile Behaviour of Carbon Fiber − Reinforced Ceramic − Matrix Composites

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