2007 Fiscal Year Final Research Report Summary
Evaluation of interfacial strength between base material and fiber in PMC at high temperatures
| Project/Area Number |
18560669
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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 |
Composite materials/Physical properties
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| Research Institution | Ube National College of Technology |
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Principal Investigator |
HATANAKA Kenji Ube National College of Technology, President (60026193)
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| Co-Investigator(Kenkyū-buntansha) |
OGAWA Hisashi Ube National College of Technology, Mechanical Eng., Professor (10043887)
OHGI Junji Yamaguchi University, Graduate School of Science and Engineering, Associate Professor (80223965)
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| Project Period (FY) |
2006 – 2007
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| Keywords | PMC / Interfacial strength / Resin / Boron fiber / FEM |
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| Research Abstract |
The single boron embedded resin-matrix sample was prepared, and then pulling out, pushing and pulsating cyclic loading tests were performed for the fiber at room temperature. FEM analysis was also made for examining the stress field around the fiber/resin matrix interface. The main results obtained are summarized as follows.
(1) The measured load-displacement response is qualitatively in agreement with the experiment appeared in the earlier paper, evidencing the validity of the present experimental procedures.
(2) The maximum shear force and the force in the following shelf-displacement process, which correspond to the load point at the first separation and the load in the following shearing displacement stage at the interface are little changed by load mode of pulling or pushing.
(3) The FEM model was constructed for analyzing the stress field around the fiber/resin-matrix interface. The calculation showed that the shear stress and the tensile normal stress reach the maximum around the top surface and decreases with distance from the top surface at the interface, where the fiber was loaded on the top surface side. This seems to cause the first separation between the fiber and the resin-matrix near the top surface.
(4) The pulsating cyclic tension test data were expressed by a common type of S-N curve.
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