Critique of Macro Flow/damage Surface Representations for Metal Matrix Composites Using Micromechanics PDF Download
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Author: Cliff Jesse Lissenden
Publisher:
ISBN:
Category : Mathematical models
Languages : en
Pages : 31
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Book Description
Author: Cliff Jesse Lissenden
Publisher:
ISBN:
Category : Mathematical models
Languages : en
Pages : 31
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Book Description
Author: Cliff J. Lissenden
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Book Description
Author: Wen S. Chan
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 530
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Book Description
Contains papers from the November 1996 congress, reflecting recent research in failure mechanisms and mechanism-based modelling in high temperature composites, and durability and damage tolerance of composites.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1076
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729055267
Category : Science
Languages : en
Pages : 38
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Book Description
A macro-micromechanics analysis was formulated to determine the matrix and fiber behavior near the notch tip in a center-notched metal matrix composite. Results are presented for a boron/aluminum monolayer. The macro-level analysis models the entire notched specimen using a three dimensional finite element program which uses the vanishing-fiber-diameter model to model the elastic-plastic behavior of the matrix and the elastic behavior of the fiber. The micro-behavior is analyzed using a Discrete Fiber-Matrix (DFM) model containing one fabric and the surrounding matrix. The dimensions of the DFM model were determined by the ply thickness and the fiber volume fraction and corresponded to the size of the notch-tip element in the macro-level analysis. The boundary conditions applied to the DFM model were determined from the macro-level analysis. Stress components within the DFM model were calculated and stress distributions are presented along selected planes and surfaces within the DFM model, including the fiber-matrix interface. Yielding in the matrix was examined at the notch tip in both the macro- and micro-level analyses. The DFM model predicted higher stresses (24 percent) in the fiber compared to the global analysis. In the notch-tip element, the interface stresses indicated that a multi-axial criterion may be required to predict interfacial failure. The DFM analysis predicted yielding to initiate in the notch-tip element at a stress level 28 percent lower than predicted by the global analysis. Bigelow, C. A. and Naik, R. A. Langley Research Center RTOP 505-63-01-05...
Author:
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 292
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Book Description
Comprising the proceedings of the International Mechanical Engineering Congress and Exposition held in Atlanta in November 1996, this volume contains contributions divided into the following headings: emerging materials technologies; advances in failure mechanisms in brittle materials; design and ma
Author: George Voyiadjis
Publisher: Elsevier Health Sciences
ISBN:
Category : Science
Languages : en
Pages : 368
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Book Description
This volume contains 15 papers which represent recent work conducted on inelasticity and micromechanics of metal matrix composites. The first part of the book covers the inelasticity of metal matrix composites and the second part the micromechanics of metal matrix composites.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722243128
Category :
Languages : en
Pages : 32
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Book Description
Flow/damage surfaces can be defined in terms of stress, inelastic strain rate, and internal variables using a thermodynamics framework. A macroscale definition relevant to thermodynamics and usable in an experimental program is employed to map out surfaces of constant inelastic power in various stress planes. The inelastic flow of a model silicon carbide/ titanium composite system having rectangular, hexagonal, and square diagonal fiber packing, arrays subjected to biaxial stresses is quantified by flow/damage surfaces that are determined numerically from micromechanics. using both finite element analysis and the generalized method of cells. Residual stresses from processing are explicitly included and damage in the form of fiber-matrix debonding under transverse tensile and/or shear loading is represented by a simple interface model. The influence of microstructural architecture is largest whenever fiber-matrix debonding is not an issue, for example in the presence of transverse compressive stresses. Additionally, as the fiber volume fraction increases, so does the effect of microstructural architecture. With regard to the micromechanics analysis, the overall inelastic flow predicted by the generalized method of cells is in excellent agreement with that predicted using a large number of displacement-based finite elements. Lissenden, Cliff J. and Arnold, Steven M. and Iyer, Saiganesh K. Glenn Research Center NCC3-481; RTOP 523-21-13...
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2540
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Book Description
