Preasymptotic Performance of Modified Mixed Finite Element Schemes for Plates
This paper is devoted to numerical investigations on shear-locking free finite element methods for Reißner-Mindlin plates recently introduced in mathematical literature. We verify and improve theoretically predicted convergence rates and provide a technique to handle preasymptotic instabilities. The approximation of stress resultants is monitored by benchmark computation. Moreover we give experimental evidence that a new adaptive automatic mesh-refining algorithm yield superior approximations. Summarizing our comprehensive numerical studies by some typical examples we deduce recommendations for employing the modified mixed finite element schemes in engineering practice.
Copyright (c) 2000 Technische Mechanik. Scientific Journal for Fundamentals and Applications of Engineering Mechanics
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