A zero curvature method to estimate the limit load is introduced in detail, and a uniform computing process for computerization of the zero curvature method is presented. A new protection criterion against plastic collapse is proposed. A lot of examples are performed and discussed. The zero curvature load determined by the zero curvature method is a preferable definition of the limit load for perfectly plastic materials or the plastic load for strain strengthening materials. Both advantages of the ASME VIII-2 code and the EN-13445 standard are absorbed in the new protection criterion.
Zero Curvature Method and Protection Criterion Against Plastic Collapse
Beijing University of Chemical Technology,
Beijing 100029, China
Shaanxi 710065, China
Beijing 100084, China
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received October 30, 2015; final manuscript received October 26, 2016; published online November 24, 2016. Assoc. Editor: Yun-Jae Kim.
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Duan, C., Sun, Y., and Lu, M. (November 24, 2016). "Zero Curvature Method and Protection Criterion Against Plastic Collapse." ASME. J. Pressure Vessel Technol. June 2017; 139(3): 031204. https://doi.org/10.1115/1.4035131
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