科研之友
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摘要
As composite has a more complex fracture behaviour and properties compared with metals, various researches have been carried out to develop design and forming technologies so as to apply composite to primary structural member. To apply it on primary structural member, the various researches on fracture characteristics have been conducted. Based on thesis research results, design and forming technologies is developed for the gradual application on primary member. Carbon fibre reinforced plastic (CFRP) has advantages of specific strength, elastic, light weight, etc. CFRP has higher specific strength and stiffness compared with general symmetric material and saves 20-50% of weight. However, mechanical performances of this anisotropic material are varied according to lamination angle and thickness, and its greatest weakness is susceptibility to the external load. Therefore, researches on optimal design technology are needed to determine mechanical properties such as compression, bending and torsion of CFRP based structural member. In this study, unidirectional prepreg sheet of CFRP is adopted to study bending strength, stiffness, axial strength, etc. For these purposes, circular and square shaped aluminium is used as base material, and CFRP is laminated in [0 degrees/90 degrees](4) and [90 degrees/0 degrees](4) of direction for the preparation of Al-CFRP hybrid member. Specimens with two shapes are manufactured according to regularly different stacking angles and are experimented on bending test by universal testing machine. Based on the results of experiments, bending strength/stiffness and axial stiffness/strength are compared.
- 出版日期2014-5
