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RISS 인기검색어
- 검색키워드
- 저자 : H. Ersen Balcıoğlu (검색결과 2 건)
- 무료
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H. Ersen Balcıoğlu,Derviş Yalçın 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
Type, structure and orientation angle of the reinforcing material used in laminated composite structures directlyaffect the mechanical behavior of the composite material. Knitted fabrics are becoming increasingly widespread asreinforcing materials in laminated composites due to their superior mechanical and physical properties. In this study,mechanical properties and fracture toughness of knitted fabric reinforced laminated composites were investigated. 1×1 ribknitted fabric reinforced glass/epoxy and carbon/epoxy laminated composites were produced by hand lay-up method. Mechanical behaviors of the produced composites were determined under tensile, compressive and shear loads. The fracturetoughness of the knitted fabric reinforced composites was determined under Mode I (0 o), Mode II (90 o) and Mode I/II (30 o,45 o, and 60 o) loading conditions by using Arcan test apparatus. In addition, the fracture toughness of glass/epoxy andcarbon/epoxy laminated composites were numerically determined using the J integral method in the ANSYS finite elementprogram. Test results have shown that knitted fabrics can be used as an alternative reinforcing material in the production oflaminated composites.
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Buckling behavior of pultruded composite beams with circular cutouts
Mehmet Aktaş,H. Ersen Balcıoğlu 국제구조공학회 2014 Steel and Composite Structures, An International J Vol.17 No.4
In this experimental and numerical study, the effect of plate thickness, the diameter of circular cutout, the distance between circular cutouts and rowing orientation angle effect (θ) on the buckling load of E-glass/vinylester pultruded composite beams with single and double circular cutouts, were investigated. The composite beam having 2, 4, and 6 mm thicknesses was produced as [Mat/θ/Mat/θ/Mat] by using pultrusion technique. Seven different fiber angles as 0°, 15°, 30°, 45°, 60°, 75°, and 90° were chosen for investigation of rowing orientation angle. The distances between each circular cutout were selected as 15, 30, 45, 60, and 75 mm in the case of double circular cutouts. The diameters of circular cutouts were chosen as 2, 4, 6, 8, and 10 mm to investigate the effect of cutout size. The experimental buckling loads were compared with the results calculated from the numerical analysis. ANSYS 11 commercial software was used for numerical study. A good agreement was obtained between numerical and experimental results.
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