GEOMETRY BASED STIFFNESS PARAMETERS FOR PREDICTING APPROACH OF LIMIT POINTS IN FINITE ELEMENT STUDIES.

J. J. Shah, H. R. Busby, G. L. Kinzel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Several parameters for evaluating the decrease in structural stiffness in nonlinear finite element problems are defined. Two types of parameters were considered: those that measure the overall softening and those that measure only a selected type of response, such as ovalization or bending. These parameters were used for detecting the approach of limit points in cylinder buckling problems under combined bending and external pressure. These parameters were used for determining when the Newton-Raphson scheme should be replaced by displacement control to prevent numerical instability. The two types of parameters used in conjunction provide not only a reliable means for sensing the approach of limit points but also a determination of buckling modes.

Original languageEnglish (US)
Title of host publicationComputers in Engineering, Proceedings of the International Computers in Engineering Conference and
Place of PublicationNew York, NY, USA
PublisherASME
Pages223-230
Number of pages8
Volume2
Publication statusPublished - 1985

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Shah, J. J., Busby, H. R., & Kinzel, G. L. (1985). GEOMETRY BASED STIFFNESS PARAMETERS FOR PREDICTING APPROACH OF LIMIT POINTS IN FINITE ELEMENT STUDIES. In Computers in Engineering, Proceedings of the International Computers in Engineering Conference and (Vol. 2, pp. 223-230). New York, NY, USA: ASME.