Assessment of load transfer characteristics of a fiber-reinforced titanium-matrix composite

Ramamurty, Upadrasta

doi:10.1016/j.compscitech.2005.03.010

Cited by 14 publications

(3 citation statements)

References 19 publications

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“…Fiber composites are applicable in any type of material, like steel-fiber-reinforced concrete, polymer, or ceramic composites as well as metal matrix composite materials [1–3]. In most cases, the fibers exhibit higher mechanical properties than the matrix to improve its behavior.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Characterization of the Fiber‐Matrix Interfacial Bond in Aerospace Composites

Aggelis

Kleitsa

Matikas

2013

The Scientific World Journal

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The properties of advanced composites rely on the quality of the fiber-matrix bonding. Service-induced damage results in deterioration of bonding quality, seriously compromising the load-bearing capacity of the structure. While traditional methods to assess bonding are destructive, herein a nondestructive methodology based on shear wave reflection is numerically investigated. Reflection relies on the bonding quality and results in discernable changes in the received waveform. The key element is the “interphase” model material with varying stiffness. The study is an example of how computational methods enhance the understanding of delicate features concerning the nondestructive evaluation of materials used in advanced structures.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Characterization of the Fiber‐Matrix Interfacial Bond in Aerospace Composites

Aggelis

Kleitsa

Matikas

2013

The Scientific World Journal

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“…Similar trends have been reported for fiber-reinforced metal-matrix composites. For instance, in SiC-fiber titanium-matrix systems, the peak tensile strains attained in bending exceed that the uniaxial tensile fracture strain by more than 60% (Ramamurty, 2004). These results demonstrate that the tensile strain for fracture of fiber-reinforced composites is not unique and thus models based on a critical strain criterion are likely to underestimate their full potential.…”

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confidence: 99%

Effects of non-uniform strains on tensile fracture of fiber-reinforced ceramic composites

Rajan¹,

Zok²

2012

Journal of the Mechanics and Physics of Solids

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a b s t r a c tEffects of non-uniform strains on tensile fracture of fiber-reinforced ceramic-matrix composites have not been satisfactorily explained by existing mechanics-based models. In this paper, we use an exact model of fiber fragmentation under global load sharing conditions to predict fracture in three model problems in which non-uniform strains occur: (i) an end-constrained plate subject to a linear transverse temperature gradient; (ii) an internally-pressurized cylindrical tube with a linear through-thickness temperature gradient; and (iii) a rectangular beam under combined bending and tension. Fracture is assumed to occur when the global load reaches a maximum value. Approximations to the exact fragmentation model are also assessed, with the goal of decoupling the effects of two important parts of the computed stress-strain response: the rate of post-peak strain softening and the magnitude of the plateau ''flow'' stress once fiber fragmentation is complete. We find that for cases in which the fiber Weibull modulus is low and hence its plateau strength is high relative to its peak and the loading yields a sufficiently high strain gradient, the failure strain lies in the plateau regime. Consequently, the results can be predicted with good accuracy using a perfectly-plastic representation of the post-peak response. In contrast, for cases in which the fiber Weibull modulus is high, the failure strain lies in the softening portion of the curve. Here a linear-softening model is found to yield accurate results. A preliminary assessment of the model has been made by comparing predicted and measured bending/tension strength and failure strain ratios for one specific composite. The correlations appear good, though additional experiments are required in order to critically assess the model predictions over a range of loading scenarios.

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“…Computational tools have been utilized in grasping a better idea of interfacial mechanism in CNT/ceramic system [17,147,165,[181][182][183]. Table 2.9 is extracted from Table 2.8 as a subset presenting details of investigations on some of the CNT-ceramic composite system.…”

Section: Cnt Reinforced Ceramic Nanocompositesmentioning

confidence: 99%

Role of carbon nanotube dispersion in fracture toughening of plasma sprayed aluminum oxide - carbon nanotube nanocomposite coating

Balani¹

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Balani, Kantesh, "Role of carbon nanotube dispersion in fracture toughening of plasma sprayed aluminum oxide -carbon nanotube nanocomposite coating" (2007 Rameshwar Ajja for their tacit support, thoughtful concern, and unselfish care during hard times. I also thank Mr. Navneet Pate and Ms. Sonali Pate for their kind support.They all pulled me together whenever I was down. They were a source of strength in me. Due to its excellent mechanical properties and bending strength, carbon nanotubes (CNT)is an ideal reinforcement for A1 2 0 3 matrix to improve its fracture toughness.The role of CNT dispersion in the fracture toughening of the plasma sprayed Reinforcement by CNTs is described by its bridging, anchoring, hook formation, impact alignment, fusion with splat, and mesh formation.The A1 2 0 3 /CNT interface is critical in assisting the stress transfer and utilizing excellent mechanical properties of CNTs. Mathematical and computational modeling using ab-initio principle is applied to understand the wetting behavior at the A1 2 0 3 /CNT interface. Contrasting storage modulus was obtained by nanoindentation (~ 210, 250, 250-350 and 325-420 GPa in A-SD, A4C-B, A4C-SD, and A8C-SD coatings respectively) depicting the toughening associated with CNT content and dispersion.ix

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Assessment of load transfer characteristics of a fiber-reinforced titanium-matrix composite

Cited by 14 publications

References 19 publications

Ultrasonic Characterization of the Fiber‐Matrix Interfacial Bond in Aerospace Composites

Ultrasonic Characterization of the Fiber‐Matrix Interfacial Bond in Aerospace Composites

Effects of non-uniform strains on tensile fracture of fiber-reinforced ceramic composites

Role of carbon nanotube dispersion in fracture toughening of plasma sprayed aluminum oxide - carbon nanotube nanocomposite coating

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