Research on Mechanical Testing Method for In-plane Shear Properties of Advanced Composite Materials
Project/Area Number |
62550050
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Aerospace engineering
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Research Institution | Nihon University, College of Industrial Technology |
Principal Investigator |
UEMURA Masuji Nihon University, College of Industrial Technology, 生産工学部, 教授 (60013611)
|
Co-Investigator(Kenkyū-buntansha) |
IWAI Hiroshi Nihon University, College of Industrial Technology, 生産工学部, 副手 (80193712)
|
Project Period (FY) |
1987 – 1988
|
Project Status |
Completed (Fiscal Year 1988)
|
Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1987: ¥1,200,000 (Direct Cost: ¥1,200,000)
|
Keywords | Advanced composite materials / CFRP / Mechanical testing method / In-plane / Picture-frame fixture / Rail-shear method / 一方向強化材 / 面内せん断 / 複合材料 / パンダグラフ法 / クロス強化材 |
Research Abstract |
The mechanical in-plane shear testing method for advanced composite panels has yet been authorized internationally because of its difficulty to present the uniform s stress field and the reliable shear properties. In the present paper, the several revisions of the traditional picture-frame loading fix is proposed to use for the in-plane shear testing method. The experiments on unidirecti and cloth-reinforced CFRP specimens and the numerical analyses by use of FEM were perfo in order to verify the advantages of these various revisions. As a result, the uniform shear stress state and hence the reliable higher shear strengths were obtained, because t is no large stress concentrations along edges and at corners, compared with other tes methods which used the traditional simple picture-frame fixture, two-rail or three-rail fixtures and JIS methos. That is, in these shear tests which are used most widely at pres the lower shear strengths were obtained because of the premature failure due to st concentration and nonuniform stress distribution. Further, it seemed that JIS method for did not give a shear fracture under combined stress conditions in unidirectional composite
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Report
(3 results)
Research Products
(10 results)