Deformation and fracture of Ti- and Ti3Al-matrix composites

Yang, Jenn‐Ming; Jeng, S. M.

doi:10.1007/bf03222257

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…Examples include metal matrix (MMC), intermetallic matrix (IMC), ceramic matrix (CMC), and even polymer matrix (PMC) composites. Experimental evidence (Majumdar and Newaz, 1992;Yang and Jeng, 1992;Blanchard and Page, 1992) suggests that in these systems, the macroscopic material behavior is dependent on both matrix inelasticity and microcracking. In particular, these phenomena interact and contribute strongly to the macroscopic toughness and ductility of the composite.…”

Section: Introduction C Ompositesmentioning

confidence: 98%

A Micromechanics Approach for Constructing Locally Averaged Damage Dependent Constitutive Equations in Inelastic Composites

Boyd

Costanzo²,

Allen

1993

International Journal of Damage Mechanics

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Homogenization techniques are utilized herein to construct locally averaged mechanical constitutive equations for composites. Techniques are first reviewed for elastic composites, followed by a review of elastic composites with cracks and inelastic composites without cracks. These reviews are followed by a development of homogenized equations for inelastic composites with cracks. All equations are constructed for the case wherein a representative volume element is subjected to spatially uniform boundary strains. Several examples are presented for a representative SiC/Ti continuous fiber composite subjected to tensile deformations transverse to the fiber direction. It is demonstrated that as the damage and matrix material model are increased in complexity, the computational requirements needed to obtain homogenized properties increase to the point where homogenization techniques may not be computationally tenable when applied recursively in macroscale structural analyses.

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Section: Introduction C Ompositesmentioning

confidence: 98%

A Micromechanics Approach for Constructing Locally Averaged Damage Dependent Constitutive Equations in Inelastic Composites

Boyd

Costanzo²,

Allen

1993

International Journal of Damage Mechanics

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“…The singlelent creep resistance. [1][2][3][4][5][6][7] In this composite, however, interfafiber composite specimens were prepared at DLR (Koeln) cial reaction between fiber and matrix occurs when exposed by the sputtering method. [7] The thickness of the sputtered at high temperatures.…”

Section: Introduction II Experimental Proceduresmentioning

confidence: 99%

Degradation mechanism of SiC/Super α 2 composite due to interfacial reaction

Ochiai

Inoue

Fujita

et al. 1999

Metall Mater Trans A

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The degradation mechanism of SiC(SCS-6)/Super ␣ 2 composite due to the interfacial reaction was studied using single-fiber composite specimens fabricated by the sputtering method, heat treated at 1273 K for various times, and tensile tested at room temperature. The main results are summarized as follows. (1) The tensile strength was reduced with progress of interfacial reaction by the formed defects on the fiber surface, while the formation of the reaction layers in the matrix side was not the direct reason for the reduction.(2) From the fracture mechanical analysis of the experimentally observed relation of the size and shape of the surface defects to the fiber strength, the fracture toughness of the fiber employed in the present work was estimated to be 2 to 4 MPaΊm. (3) The change in distribution of strength of the reacted fiber with progressing reaction was simulated successfully by combining the Monte Carlo method with the Weibull distribution function for the strength of the unreacted fiber, the Gumbell distribution function for the maximum effective size of the surface defect of the reacted fiber, and the fracture mechanics.

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“…Recently, the damage evolution at the crack-tip of several notched unidirectional SCS-6/Ti alloy matrix composites under static and dynamic loading has been characterized.1" 3 The results indicate that the crack initiation and propagation mechanisms are strongly dependent on the fiber strength, interfacial shear strength, and matrix toughness. However, because of their inhomogeneity and anisotropic nature, the initiation and propagation of microscopic damage which leads to the failure of the composites are different from that seen in conventional isotropic materials.…”

Section: Introductionmentioning

confidence: 99%

The effect of fiber orientation on matrix plasticity and fracture behavior of SiC fiber-reinforced titanium matrix composites

1994

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The effect of fiber orientation on the matrix plasticity and fracture behavior of SCS-6 fiber-reinforced Ti-15V-3Al-3Cr-3Sn composites was studied. The laminates used in this study were [0]6, [0/±45]s, and [90/+45]s. Three-point bending tests were conducted on chevron-notched specimens to determine the crack initiation energy, fracture toughness, and fracture strength as a function of notch length. The critical energy release rate was determined from the slope of the crack initiation energy versus notch length curve. The damage evolution and development of the matrix plastic deformation zone at the notch tip during the crack initiation and propagation as a function of fiber orientation were also determined. The relationships among the crack-tip matrix plastic deformation zone size, the critical energy release rate, and notch strength of the composites were discussed.

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Deformation and fracture of Ti- and Ti3Al-matrix composites

Cited by 13 publications

References 10 publications

A Micromechanics Approach for Constructing Locally Averaged Damage Dependent Constitutive Equations in Inelastic Composites

A Micromechanics Approach for Constructing Locally Averaged Damage Dependent Constitutive Equations in Inelastic Composites

Degradation mechanism of SiC/Super α 2 composite due to interfacial reaction

The effect of fiber orientation on matrix plasticity and fracture behavior of SiC fiber-reinforced titanium matrix composites

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