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The effects of the distance between two defects on the load carrying capacity of pressure vessel

Chen, Haofeng and Shu, D.W. (2000) The effects of the distance between two defects on the load carrying capacity of pressure vessel. Journal of Pressure Vessel Technology, 122 (2). pp. 198-203. ISSN 0094-9930

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Abstract

A simplified numerical method for both lower and upper-bound limit analyses of 3-D structure has been developed in our previous work. The load-carrying capacities of 3-D pipelines with either one or two part-through defects of various geometrical configurations were calculated by the proposed method. In the present paper, the effects of the distance between two defects on the load-carrying capacity of pressure vessels are evaluated and discussed in details. Using curve-fitting schemes, an empirical formula for obtaining the load-carrying capacity of pressure vessels with double defects from that of pressure vessels with a single defect are proposed. Some engineering suggestions are presented simultaneously. All the numerical results confirm the applicability of the simplified numerical method.