The theoretical foundation of Youngdahl’s correlation parameters, which have been used to eliminate pulse shape effects in the dynamic plastic response of two-dimensional structural members, is studied in the present paper with the aid of bounds obtained for a rigid-plastic material. It is shown that Youngdahl’s empirical estimate for the structural response time is, in general, a lower bound on the actual response time. A lower bound expression is obtained for the maximum final displacement of a two-dimensional structural member when subjected to an axisymmetrically loaded transverse time-dependent pulse, which depends only on Youngdahl’s correlation parameters, and offers a theoretical foundation for the validity of Youngdahl’s correlation parameter method.
Foundation of Correlation Parameters for Eliminating Pulse Shape Effects on Dynamic Plastic Response of Structures
Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS. Manuscript received by the Applied Mechanics Division, February 13, 2001; final revision, August 10, 2004. Associate Editor: B. M. Moran. Discussion on the paper should be addressed to the Editor, Prof. Robert M. McMeeking, Journal of Applied Mechanics, Department of Mechanical and Environmental Engineering, University of California—Santa Barbara, Santa Barbara, CA 93106-5070, and will be accepted until four months after final publication in the paper itself in the ASME JOURNAL OF APPLIED MECHANICS.
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Li, Q. M., and Jones, N. (March 15, 2005). "Foundation of Correlation Parameters for Eliminating Pulse Shape Effects on Dynamic Plastic Response of Structures ." ASME. J. Appl. Mech. March 2005; 72(2): 172–176. https://doi.org/10.1115/1.1839183
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