Korean Society for Advanced Composite Structures 1 한ῃ복합신소재ῂ조학회 논문집 제5권, 제3호, 2014년 9월 J. Korean Soc. Adv. Comp. Struc. Vol. 5, No. 3, pp. 1-7, September 2014 DOI http://dx.doi.org/10.11004/kosacs.2014.5.3.001 ISSN 2093-5145(Print) ISSN 2288-0232(Online) 홀의 유무에 따른 평판 굴하 산정을 위한 굴계수 베자드 모하마자데  · 노혁천  세종대학교 건설환경공학과 박사과정 1 , 세종대학교 건설환경공학과 부교수 2 Use of Buckling Coefficient in Predicting Buckling Load of Plates with and without Holes Behzad Mohamazadeh 1 · Noh, Hyuk-Chun 2 1\ Ph.D. Student, Department of Civil and Environmental Engineering, Sejong University, Seoul, Korea 2 Assistant professor, Department of Civil and Environmental Engineering, Sejong University, Seoul, Korea Abstract: Buckling, a form of failure happened to plated structures, is investigated in this study. The main focus is to investigate the effects of thickness of the plates having through-thickness holes on buckling when the plate is subjected to in-plane compression. Plates having length of 200mm and width of 100mm are chosen to have thickness in range from 0.50mm to 10mm. Two holes of diameters of 20mm are implemented in plates. The finite element procedure using ABAQUS is applied for analyses. Then using the Gerard and Becker equation compressive buckling coefficients, Kc, are calculated and presented to enable engineers to calculate buckling load for the desired plate with holes in specific dimension. In order to generalize the obtained results, verification analysis has been performed by taking plates having different dimensions from the original ones used in this study. The verification showed the capability of buckling coefficients to predict buckling stresses of plates in various dimensions. Key Words: Buckling stress, Buckling coefficient, Plates with holes, ABAQUS 주요어 ڕBuckling stress, Buckling coefficient, Plates with holes, ABAQUS Corresponding author : Noh, Hyuk-Chun Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea. Tel: +82-2-3408-3292, Fax: +82-2-3408-4332, E-mail: cpebach@sejong.ac.kr 투고일ڏڌڋڍ ڕ년 ڔ월 ڍڌ일 ڊ수정일ڏڌڋڍ ڕ년 ڔ월 ڍڍ일 ڊ게재확정일ڏڌڋڍ ڕ년 ڔ월 ڎڍ일 1. INTRODUCTION Thin steel plates exist in many structures, such as deck and bottom of ship structures, plate and box girders of bridges, platforms of offshore structures, and structures used in aerospace industries. Sometimes depending on requirements, it is needed to make holes in plates. The presence of holes in plates will change the strength and stiffness of the plate, so the amounts of stress and their distribution which induce the change in the load bearing capacity of the plate, which might be different from plates without holes (Choi et al. 2012; Cristopher et al. 2009). When a plate element is subjected to direct compression, the plate may buckle locally before the member as a whole becomes unstable or before the yield stress of the material is reached. When a plate has a hole, the compressive stress arises near the hole, and the stress may cause local buckling of the plate