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Consistent Finite Element Models for Elastic Plastic Kirchhoff Plates
Abstract Conventional displacement finite element formulations for elastic-plastic analysis are faced with the impossibility of enforcing the constitutive relation of rate plasticity locally. This is imposed at a selected set of points only, and, because of significant operational advantages, Gauss integration points are usually employed to this purpose [1]. A common feature of such procedures is that an increase in the number of points where plasticity is enforced, instead of producing more refined models, stiffens the element behavior, sometimes so badly that the model is described as “locking” [2]. Actually, computational experience shows that the best results are obtained by limiting the number of Gauss points to the minimum possible value and that so called reduced integration is preferable in several instances [3].
Consistent Finite Element Models for Elastic Plastic Kirchhoff Plates
Abstract Conventional displacement finite element formulations for elastic-plastic analysis are faced with the impossibility of enforcing the constitutive relation of rate plasticity locally. This is imposed at a selected set of points only, and, because of significant operational advantages, Gauss integration points are usually employed to this purpose [1]. A common feature of such procedures is that an increase in the number of points where plasticity is enforced, instead of producing more refined models, stiffens the element behavior, sometimes so badly that the model is described as “locking” [2]. Actually, computational experience shows that the best results are obtained by limiting the number of Gauss points to the minimum possible value and that so called reduced integration is preferable in several instances [3].
Consistent Finite Element Models for Elastic Plastic Kirchhoff Plates
Corradi, Leone (author) / Genna, Francesco (author) / Annovazzi, Lorella (author)
1991-01-01
6 pages
Article/Chapter (Book)
Electronic Resource
English
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