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1	Parameter identification problems for elastic large deformations - Part II: numerical solution and results Meyer, Marcus 20 November 2009 (has links) (PDF) In this paper we continue the considerations of [5] (CSC/09-05). A numerical study for the parameter identification problem with linear elastic material and large deformations is presented. We discuss the numerical implementation in MATLAB and illustrate some results for a 2D test problem. identification problem large elastic deformations material laws ddc:510 Finite-Elemente-Methode Inverses Problem
2	Parameter identification problems for elastic large deformations - Part I: model and solution of the inverse problem Meyer, Marcus 20 November 2009 (has links) (PDF) In this paper we discuss the identification of parameter functions in material models for elastic large deformations. A model of the the forward problem is given, where the displacement of a deformed material is found as the solution of a n onlinear PDE. Here, the crucial point is the definition of the 2nd Piola-Kirchhoff stress tensor by using several material laws including a number of material parameters. In the main part of the paper we consider the identification of such parameters from measured displacements, where the inverse problem is given as an optimal control problem. We introduce a solution of the identification problem with Lagrange and SQP methods. The presented algorithm is applied to linear elastic material with large deformations. identification problem large elastic deformations material laws nonlinear inverse problem sequential quadratic programming ddc:510 Inverses Problem
3	Parameter identification problems for elastic large deformations - Part II: numerical solution and results Meyer, Marcus 20 November 2009 (has links) In this paper we continue the considerations of [5] (CSC/09-05). A numerical study for the parameter identification problem with linear elastic material and large deformations is presented. We discuss the numerical implementation in MATLAB and illustrate some results for a 2D test problem. info:eu-repo/classification/ddc/510 ddc:510 Finite-Elemente-Methode Inverses Problem identification problem large elastic deformations material laws
4	Parameter identification problems for elastic large deformations - Part I: model and solution of the inverse problem Meyer, Marcus 20 November 2009 (has links) In this paper we discuss the identification of parameter functions in material models for elastic large deformations. A model of the the forward problem is given, where the displacement of a deformed material is found as the solution of a n onlinear PDE. Here, the crucial point is the definition of the 2nd Piola-Kirchhoff stress tensor by using several material laws including a number of material parameters. In the main part of the paper we consider the identification of such parameters from measured displacements, where the inverse problem is given as an optimal control problem. We introduce a solution of the identification problem with Lagrange and SQP methods. The presented algorithm is applied to linear elastic material with large deformations. info:eu-repo/classification/ddc/510 ddc:510 Inverses Problem identification problem large elastic deformations material laws nonlinear inverse problem sequential quadratic programming
5	Grundlagen der Elasto-Plastizität in Creo Simulate - Theorie und Anwendung / Basics of Elasto-Plasticity in Creo Simulate - Theory and Application Jakel, Roland 10 May 2012 (has links) (PDF) Der Vortrag beschreibt die Grundlagen der Elasto-Plastizität sowie die softwaretechnische Anwendung mit dem FEM-Programm Creo Simulate bzw. Pro/MECHANICA von PTC. Der erste Teil des Vortrages beschreibt die Charakteristika plastischen Verhaltens, unterschiedliche plastische Materialgesetze, Fließkriterien bei mehrachsiger Beanspruchung und unterschiedliche Verfestigungsmodelle. Im zweiten Vortragsteil werden Möglichkeiten und Grenzen der Berechnung elasto-plastischer Probleme mit der Software dargestellt sowie Anwendungstipps gegeben. Im dritten Vortragsteil schließlich werden verschiedene Beispiele vorgestellt, davon besonders ausführlich das Verhalten einer einachsigen elasto-plastischen Zugprobe vor und nach dem Eintreten der Einschnürdehnung. / This presentation describes the basics of elasto-plasticity and its application with the finite element software Creo Simulate (formerly Pro/MECHANICA) from PTC. The first part describes the characteristics of plastic behavior, different plastic material laws, yield criteria for multiaxial stress states and different hardening models. In the second part, the opportunities and limitations of analyzing elasto-plastic problems with the FEM-code are described and user information is provided. The last part finally presents different examples. Deeply treated is the behavior of a uniaxial tensile test specimen before and after elongation with necking appears. Elasto-Plastizität Creo Simulate Mechanica FEM Plastitzität kleiner Dehnungen Plastitzität großer Dehnungen technische Spannung wahre Spannung technische Dehnung logarithmische Dehnung kinematische und isotrope Verfestigung plastische Materialgesetze sprödes und duktiles Verhalten Mehrachsigkeit Lastschritte Entlasten Elasto-plasticity Creo Simulate Mechanica FEM small strain plasticity finite strain plasticity engineering stress true stress engineering strain logarithmic strain yield criteria kinematic and isotropic hardening elasto-plastic material laws brittle and ductile behavior multi-axial plasticity characteristic measures for plasticity load steps unloading meshing uniaxial tensile test with necking ddc:629 Fließbedingung Plastizität Dehnung Mehrachsigkeit Vernetzung
6	Grundlagen der Elasto-Plastizität in Creo Simulate - Theorie und Anwendung / Basics of Elasto-Plasticity in Creo Simulate - Theory and Application Jakel, Roland 10 May 2012 (has links) Der Vortrag beschreibt die Grundlagen der Elasto-Plastizität sowie die softwaretechnische Anwendung mit dem FEM-Programm Creo Simulate bzw. Pro/MECHANICA von PTC. Der erste Teil des Vortrages beschreibt die Charakteristika plastischen Verhaltens, unterschiedliche plastische Materialgesetze, Fließkriterien bei mehrachsiger Beanspruchung und unterschiedliche Verfestigungsmodelle. Im zweiten Vortragsteil werden Möglichkeiten und Grenzen der Berechnung elasto-plastischer Probleme mit der Software dargestellt sowie Anwendungstipps gegeben. Im dritten Vortragsteil schließlich werden verschiedene Beispiele vorgestellt, davon besonders ausführlich das Verhalten einer einachsigen elasto-plastischen Zugprobe vor und nach dem Eintreten der Einschnürdehnung. / This presentation describes the basics of elasto-plasticity and its application with the finite element software Creo Simulate (formerly Pro/MECHANICA) from PTC. The first part describes the characteristics of plastic behavior, different plastic material laws, yield criteria for multiaxial stress states and different hardening models. In the second part, the opportunities and limitations of analyzing elasto-plastic problems with the FEM-code are described and user information is provided. The last part finally presents different examples. Deeply treated is the behavior of a uniaxial tensile test specimen before and after elongation with necking appears. info:eu-repo/classification/ddc/629 ddc:629

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