Assessment of residual ultimate strength of cracked steel plates under longitudinal compression. (15th July 2016)

• Record Type: Journal Article
• Authors: Cui, Chong; Yang, Ping; Xia, Tian; Du, Jingjing
• Is Part Of: Ocean engineering. Volume 121(2016)
• Page Start: 174
• Page End: 183
• Publication Date: 2016-07-15
• Subjects: Residual ultimate strength -- Cracked steel plate -- Longitudinal compression -- Crack projected length -- Nonlinear finite element analysis; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2016.05.035
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: This paper numerically deals with the ultimate strength reduction characteristics of steel plate due to crack damage under longitudinal compression. A series of nonlinear finite element analyses was carried out with varying the length, location, and orientation angle of cracks to examine their effects on the ultimate strength of cracked steel plates. Three types of cracks, namely transverse crack, longitudinal crack and inclined crack, are considered in the present study. It was assumed that the cracks are through-thickness, having no contact between their faces and propagation of cracks is not considered in the present study. It is found that the minimum and the maximum ultimate strength values are obtained for the transverse crack and longitudinal crack cases respectively when the crack length is constant. The projected length of the crack normal to loading direction is an influential parameter to the ultimate compressive strength of plate with central inclined crack. Based on the numerical results, simple empirical formula as a function of crack projected length are proposed to predict the ultimate strength of plate with central inclined crack under longitudinal compression. Highlights: Reduction of plate ultimate strength is large as crack approaches plate long edge. Transverse crack gives the lowest ultimate strength value. Crack projected length is an influential parameter. A simple formula as a function of normalized crack projected length is proposed.