Shakedown Limits for a Metal Matrix Composite

Digital Library / Journal of Composites Technology and Research (JCTR) / Citation Page

Volume 23, Issue 3 (July 2001)

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ISSN: 0884-6804
Page Count: 8

Shakedown Limits for a Metal Matrix Composite
Ponter, ARS
Professor of Engineering, University of Leicester,

Carter, KF

Duggan, JM

Abstract

The paper discusses a method for the evaluation of the yield values of a metal matrix composite material when subjected to a variation in temperature. A direct shakedown analysis method is described which produces a shakedown stress value as a result of a sequence of incompressible linear solutions with a spatially varying modulus. The process converges to the minimum upper bound associated with the class of displacement fields when implemented in a finite element method (Ponter and Carter [1,2]). The solutions for an Aluminum/alumina system loaded in a direction perpendicular to the direction of the fibers demonstrate the high sensitivity of this material to fluctuations in temperature. Simple approximate equations for strength values are presented in terms of nondimensional variables.

Keywords:
metal matrix composites, thermal stresses, shakedown, computational methods

Paper ID: CTR10554J
DOI: 10.1520/CTR10554J
ASTM International is a member of CrossRef.

Author Title Shakedown Limits for a Metal Matrix Composite Symposium , 0000-00-00 Committee D30

		Home Journals STPs Manuals Topics Subscriptions/Pricing Digital Library / Journal of Composites Technology and Research (JCTR) / Citation Page Volume 23, Issue 3 (July 2001) Click here to download this paper now for $25 PDF (336K) View License Agreement ISSN: 0884-6804 Page Count: 8 Shakedown Limits for a Metal Matrix Composite Ponter, ARS Professor of Engineering, University of Leicester, Carter, KF Duggan, JM Abstract The paper discusses a method for the evaluation of the yield values of a metal matrix composite material when subjected to a variation in temperature. A direct shakedown analysis method is described which produces a shakedown stress value as a result of a sequence of incompressible linear solutions with a spatially varying modulus. The process converges to the minimum upper bound associated with the class of displacement fields when implemented in a finite element method (Ponter and Carter [1,2]). The solutions for an Aluminum/alumina system loaded in a direction perpendicular to the direction of the fibers demonstrate the high sensitivity of this material to fluctuations in temperature. Simple approximate equations for strength values are presented in terms of nondimensional variables. Keywords: metal matrix composites, thermal stresses, shakedown, computational methods Paper ID: CTR10554J DOI: 10.1520/CTR10554J ASTM International is a member of CrossRef. Author Title Shakedown Limits for a Metal Matrix Composite Symposium , 0000-00-00 Committee D30