1997 Fiscal Year Final Research Report Summary
Study on Effect of Interfacial Damage on Creep Behavior of Metal Matrix Composites
| Project/Area Number |
08650087
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Akita University |
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Principal Investigator |
SHIBUYA Yotsugi Akita University, Mining Collage, Associate Professor, 鉱山学部, 助教授 (00154261)
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| Project Period (FY) |
1996 – 1997
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| Keywords | Composite Material / Metal Matrix / Interfacial Damage / Creep / Homogenization Theory / Three Dimensional Analysis |
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| Research Abstract |
Effect of interfacial damage on creep behavior of composite is considered. Degradation of interfacial properties between fiber and matrix may occur during loading at elevated temperature. Residual stress and interfacial properties affect the behavior of composite materials. Relaxation of stress in the matrix initiates slip at interface between fiber and matrix. Creep behavior of metal matrix composite is evaluated by using a homogenization theory. Microstructure of composite is assumed to be periodical, and an associated unit cell is made in the composite. The composite with fiber breakage, slip of interface and time-dependent property of matrix is modeled in the analysis.
Macroscopic constitutive relation is described by the homogenization theory with microscopic relations. A boundary integral equation method is applied to obtain perturbed displacement for microscopic analysis. For efficient generation of boundary mesh, a commercial pre- and post processor is used to make models of analysis.
Mechanism of creep behavior in the metal matrix composite is studied by microscopic analysis in numerical calculation. The method is applied to a SCS6/Ti-6Al-4V metal matrix composite. The creep deformation is accelerated by interfacial slip at elevated temperature due to decreasing of compressive residual stress on the interface.
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