| Project/Area Number |
10450248
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Composite materials/Physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KAGAWA Yutaka Institute of Industrial Science, The University of Tokyo, Professor, 生産技術研究所, 教授 (50152591)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥13,900,000 (Direct Cost: ¥13,900,000)
Fiscal Year 1999: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1998: ¥8,600,000 (Direct Cost: ¥8,600,000)
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| Keywords | Fiber-reinforced composite / Interface sliding shear stress / Real contact area / Push-out test / Push-back test / Interface mechanical property / Interface roughness / Quantitative analysis / Al_2O_3マトリックス系複合材料 / SiCマトリックス系複合材料 / せん断滑り応力 / ガラスマトリックス系複合材料 / 炭素コーティング / 繊維強化セラミックス |
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| Research Abstract |
The properties of fiber-reinforced composites are strongly dependent on interface mechanical properties. Thus, understanding of interface mechanical properties becomes an important subject of recent researches. Among the interfacial mechanical properties shear frictional resistance is important. The attention of this study has been focused on a new approach for evaluation of interface shear frictional resistance by introducing a real contact area at a frictional sliding interface. The study involves (1) effect of interface roughness on shear frictional resistance, (2) quantitative analysis of interface shear frictional resistance using a real contact area approach, and (3) application of the real contact area for engineering composite.
The effect of interface roughness on shear frictional resistance is examined using model composites. Fibers with a different surface roughness are incorporated into an epoxy matrix and the interface shear frictional resistance is evaluated by push-out and push-back tests. The result shows strong dependence of interface shear frictional resistance on the profile of surface roughness at frictional sliding interface. The real contact area analysis is introduced to evaluate shear frictional stress, and the analysis gives quantitative understanding of shear frictional resistance. The interface shear frictional resistance, τィイD2sィエD2, is expressed as τィイD2sィエD2=(AィイD2rィエD2/AィイD2aィエD2)・τィイD20ィエD2 where AィイD2rィエD2 and AィイD2aィエD2, respectively, are the real contact area and apparent contact area at frictional sliding interface, τィイD20ィエD2 is the intrinsic shear frictional resistance at the real contact area. This approach is applied to the evaluation of interface shear frictional resistance in AlィイD22ィエD2OィイD23ィエD2 fiber-reinforced AlィイD22ィエD2OィイD23ィエD2 matrix composite. The result indicates that the microstructural effect of the composite is successfully evaluated using a rear contact area approach.
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