Multi-fracture of ceramic composites

Weitsman, Y.; Zhu, Han

doi:10.1016/0022-5096(93)90012-5

Cited by 59 publications

(11 citation statements)

References 17 publications

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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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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 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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“…A vast volume of work exists in the literature on the modeling of damage processes in composite materials. Shear lag and rigorous micromechanics approaches have been used to predict the first cracking stress as well as the overall nonlinear stress-strain response of unidirectional CMCs [4][5][6][7][8][9]. In these approaches the damage entity (a crack) is explicitly modeled.…”

Section: Modeling Of the Ply Damage Processmentioning

confidence: 99%

“…Damage mechanisms occurring within the plies of a CMC material under imposed mechanical load have been extensively studied and modeled using both micromechanics and continuum damage mechanics approaches [4][5][6][7][8][9][10][11][12][13][14]. On the other hand, only a limited amount of research has been reported on modeling the delamination failure processes in CMCs.…”

Section: Introductionmentioning

confidence: 99%

Analysis of coupled ply damage and delamination failure processes in ceramic matrix composites

Kumar¹

2013

Acta Materialia

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Multi-fracture of ceramic composites

Cited by 59 publications

References 17 publications

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

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

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

Analysis of coupled ply damage and delamination failure processes in ceramic matrix composites

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