Plastic multipliers as driving variables of numerical simulation in elastoplasticity |
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Authors: | Yu. Vetyukov J. Gerstmayr H. Irschik |
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Affiliation: | Division of Technical Mechanics, Institute of Mechanics and Machine Design, Johannes Kepler University of Linz, Altenbergerstr. 69, A-4040, Linz, Austria |
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Abstract: | Statics of elasto-plastic media is stated in terms of eigenstrains acting upon a background elastic problem with fixed (initial) stiffness. In order to minimize the number of unknowns and to provide computationally cheap algorithms plastic multipliers are used as main driving variables. Fixed-point type iterations are suggested for computing plastic multipliers within the load increment. Numerical experiments results are shown to be in good correlation with other software results. A range of problems is outlined where the usage of the proposed algorithms can be advantageous. |
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Keywords: | Plasticity Numerical simulation Plastic multipliers Initial stiffness Fixed-point iterations |
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