Matrix fatigue cracking in fiber composites

McMeeking, Robert M.; Evans, A.G.

doi:10.1016/0167-6636(90)90004-y

Cited by 158 publications

(29 citation statements)

References 12 publications

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“…These composites exhibit features that cannot be characterized in accordance with the Paris law that governs only matrix behavior [48]. For example, the Paris law does not take accounts that the bridging tractions undergo reversals when the cyclic loads are reversed.…”

Section: Crack-bridging Under Cyclic Loadingmentioning

confidence: 98%

Fracture and fatigue of natural fiber-reinforced cementitious composites

Savastano

Santos

Radonjic

et al. 2009

Cement and Concrete Composites

189

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Section: Crack-bridging Under Cyclic Loadingmentioning

confidence: 98%

Fracture and fatigue of natural fiber-reinforced cementitious composites

Savastano

Santos

Radonjic

et al. 2009

Cement and Concrete Composites

189

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“…The monotonic result can be converted into the cyclic result through the following transformation [32]:…”

Section: Calculation Of Dk Tip By Using the Partial Shearlag Modelmentioning

confidence: 99%

Fatigue crack initiation and multiplication of unnotched titanium matrix composites

1998

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AbstractÐFatigue crack initiation and multiplication of the unnotched SCS-6 silicon carbide ®ber-reinforced titanium matrix composites with dierent matrix and interfacial properties have been investigated experimentally and analytically. Ti±15V±3Al, Ti±6Al±4V, and Ti±22Al±23Nb were chosen as matrix materials. The initiation and propagation of each individual matrix crack as a function of fatigue cycles and applied stress levels were carefully monitored. The statistical distribution of crack growth rates in each composite has been constructed and analyzed. The evolution of normalized matrix crack density and stiness reduction of these composites under fatigue loading also has been characterized. A modi®ed shear-lag model, coupled with the strain-life equation and a ®ber bridging model were used to predict the fatigue crack initiation life, matrix crack growth rate, normalized matrix crack density, and residual stiness of the composites. The predicted fatigue properties correlated well with experimental results. #

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“…This has been modeled as the shear resistance against sliding at fibedmatrix interfaces [12,13]. For a perfect interface, the shear resistance is large so that there is no sliding.…”

Section: Modeling Of Damage At Fibermatrix Interfacesmentioning

confidence: 99%

The Effect of Interface Damage on the Microbuckling of Unidirectional Fiber-Reinforced Composites

Liu

Stout

Hwang

1997

KEM

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Fiber microbuckling is the primary failure mechanism in unidirectional fiber-reinforced composites under compression. Due to processing or service conditions, damage (e.g., microcracks) exists at fibedmatrix interfaces. The effect of damage on the microbuckling of fibers is investigated in the present study. Based on the micromechanics analysis, the damage at interfaces is modeled as a linear spring against interface sliding, and the spring constant depends on the damage level. It is established that the critical strain for fiber microbuckling is relatively insensitive to the interface damage, but increases rapidly with the fiber volume fraction. INTRODUCTIONFiber microbuckling has been identified as the mechanism for tensiodcompression asymmetry of long and aligned fiber-reinforced composites [ 11. Due to microbuckling of fibers, the compressive strength is only half of the tensile strength for fibrous composites (11. The effect of piastic microbuckling and fiber kinking in composites have been investigated (2-61. It has been observed repeatedly in experiments [7,8] that the compressive failure of fibers originates from a traction-free surface and subsequently propagates into the interior of the specimen, triggering a global failure of the test specimen. A simple model 191 has been developed to show that the initial microbuckling of fibers indeed starts from a traction-free surface. The model has been extended to incorporate the effect of elastic anisotropy of composites [lo]. It is established that the fiber buckling strain accounting for the anisotropy of composites is more than twice that for isotropic solids. However, these studies -.,are limited to ideal fiber-reinforced composites without any interface damage.

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Matrix fatigue cracking in fiber composites

Cited by 158 publications

References 12 publications

Fracture and fatigue of natural fiber-reinforced cementitious composites

Fracture and fatigue of natural fiber-reinforced cementitious composites

Fatigue crack initiation and multiplication of unnotched titanium matrix composites

The Effect of Interface Damage on the Microbuckling of Unidirectional Fiber-Reinforced Composites

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