Hallo liebe Gemeinde,
ich habe mir mal alle Procedure Types rausgesucht und gegenübergestellt. Siehe Liste ganz unten. Dennoch habe ich Schwierigkeiten meinen Realprozess dort einzuordnen. Zur Zeit rechne ich den Festwalzprozess Dynamic Explcit, frage mich aber gerade, warum nicht Dynamic Implicit mit moderate dissipation oder quasi-static oder Static, General.
Beim Festwalzprozess rollt eine Kugel unter Krafteinwirkung über eine Oberfläche und hinterlässt Eigenspannungen, Kaltverfestigung und Oberflächenglättung, ist also elastisch-plastisch bei Winkelgeschwindigkeiten von bis zu 90 rad/s simuliert worden.
Generell würde mich interessieren, wie ich meinen Prozess diesen Typs zuordenen kann. Wie kann ich mir dieses Wissen aneignen?
Danke und Gruß
-- Configuring a static, general procedure
A static stress procedure is one in which inertia effects are neglected. The analysis can be linear or nonlinear and ignores time-dependent material effects. For more information, see “Static stress analysis,” Section 6.2.2 of the Abaqus Analysis User's Manual.
Configuring a static, Riks procedure
Geometrically nonlinear static problems sometimes involve buckling or collapse behavior, where the load-displacement response shows a negative stiffness, and the structure must release strain energy to remain in equilibrium. The modified Riks method allows you to find static equilibrium states during the unstable phase of the response.
You can use this method for cases where the load magnitudes are governed by a single scalar parameter. It is also useful for solving ill-conditioned problems such as limit load problems or almost unstable problems that exhibit softening. For more information, see “Unstable collapse and postbuckling analysis,” Section 6.2.4 of the Abaqus Analysis User's Manual.
Configuring a dynamic, explicit procedure
An explicit, dynamic analysis is computationally efficient for the analysis of large models with relatively short dynamic response times and for the analysis of extremely discontinuous events or processes. This type of analysis allows for the definition of very general contact conditions and uses a consistent, large-deformation theory. For more information, see “Explicit dynamic analysis,” Section 6.3.3 of the Abaqus Analysis User's Manual.
Configuring a heat transfer procedure
You can perform an uncoupled heat transfer analysis to model solid body heat conduction with general, temperature-dependent conductivity, internal energy (including latent heat effects), and general convection and radiation boundary conditions, including cavity radiation. For more information, see “Uncoupled heat transfer analysis,” Section 6.5.2 of the Abaqus Analysis User's Manual.
Configuring a dynamic, implicit procedure
General linear or nonlinear dynamic analysis in Abaqus/Standard uses implicit time integration to calculate the transient dynamic response of a system. See “Implicit dynamic analysis using direct integration,” Section 6.3.2 of the Abaqus Analysis User's Manual, or “Implicit dynamic analysis,” Section 2.4.1 of the Abaqus Theory Manual, for details on implicit dynamic analysis.
Configuring a fully coupled, simultaneous heat transfer and stress procedure
You must configure a fully coupled temperature-displacement analysis when the stress analysis is dependent on the temperature distribution and the temperature distribution depends on the stress solution. For example, metalworking problems may include significant heating due to inelastic deformation of the material which, in turn, changes the material properties. For such cases the thermal and mechanical solutions must be obtained simultaneously rather than sequentially. For more information, see “Fully coupled thermal-stress analysis,” Section 6.5.4 of the Abaqus Analysis User's Manual.
Configuring a fully coupled, simultaneous heat transfer and electrical procedure
Joule heating arises when the energy dissipated by an electrical current flowing through a conductor is converted into thermal energy. Abaqus/Standard provides a fully coupled thermal-electrical procedure for analyzing this type of problem; the coupled thermal-electrical equations are solved simultaneously for both temperature and electrical potential at the nodes. For more information, see “Coupled thermal-electrical analysis,” Section 6.7.2 of the Abaqus Analysis User's Manual.
Configuring a direct cyclic procedure
A direct cyclic procedure is a quasi-static analysis that uses a combination of Fourier series and time integration of the nonlinear material behavior to obtain the stabilized cyclic response of the structure iteratively. To avoid the considerable numerical expense associated with a transient analysis, a direct cyclic procedure can be used to calculate the cyclic response of a structure directly. The basis of this method is to construct a displacement function that describes the response of the structure at all times t during a load cycle with period T. For more information, see “Direct cyclic analysis,” Section 6.2.6 of the Abaqus Analysis User's Manual.
Configuring a dynamic fully coupled thermal-stress procedure using explicit integration
You must configure a fully coupled temperature-displacement analysis when the stress analysis is dependent on the temperature distribution and the temperature distribution depends on the stress solution. For such cases the thermal and mechanical solutions must be obtained simultaneously rather than sequentially. In Abaqus/Explicit a fully coupled thermal-stress analysis includes inertia effects and models transient thermal response. For more information, see “Fully coupled thermal-stress analysis in Abaqus/Explicit” in “Fully coupled thermal-stress analysis,” Section 6.5.4 of the Abaqus Analysis User's Manual.
Configuring a geostatic stress field procedure
A geostatic stress field procedure allows you to verify that the initial geostatic stress field is in equilibrium with applied loads and boundary conditions. It also allows you to iterate, if necessary, to obtain equilibrium; or you can allow Abaqus to compute equilibrium automatically for cases in which the initial state is unknown. This type of procedure is usually the first step of a geotechnical analysis, followed by a coupled pore fluid diffusion/stress or static analysis procedure. For more information, see “Geostatic stress state,” Section 6.8.2 of the Abaqus Analysis User's Manual.
Configuring a mass diffusion procedure
A mass diffusion analysis models the transient or steady-state diffusion of one material through another, such as the diffusion of hydrogen through a metal. The governing equations for mass diffusion are an extension of Fick's equations: they allow for nonuniform solubility of the diffusing substance in the base material and for mass diffusion driven by gradients of temperature and pressure. For more information, see “Mass diffusion analysis,” Section 6.9.1 of the Abaqus Analysis User's Manual.
Configuring an effective stress analysis for fluid-filled porous media
A coupled pore fluid diffusion/stress analysis allows you to model single phase, partially or fully saturated fluid flow through porous media. For more information, see “Coupled pore fluid diffusion and stress analysis,” Section 6.8.1 of the Abaqus Analysis User's Manual.
Configuring a transient, static, stress/displacement analysis with time-dependent material response
You can use a quasi-static stress analysis to analyze problems with time-dependent material response (creep, swelling, viscoelasticity, and two-layer viscoplasticity). This type of analysis is valid when inertial effects can be neglected. It can be linear or nonlinear. For more information, see “Quasi-static analysis,” Section 6.2.5 of the Abaqus Analysis User's Manual.
Configuring an annealing procedure
The anneal procedure is intended to simulate the relaxation of stresses and plastic strains that occurs as metals are heated to high temperatures. Physically, annealing is the process of heating a metal part to a high temperature to allow the microstructure to recrystallize, removing dislocations caused by cold working of the material. During the anneal procedure Abaqus/Explicit sets all appropriate state variables to zero. These variables include stresses, backstresses, plastic strains, and velocities. In the case of metal porous plasticity, the void volume fraction is also set to zero, such that the material becomes fully dense.
There is no time scale in an annealing step; therefore, time does not advance. The annealing process occurs instantaneously. No data are required for the anneal procedure.
Configuring a flow procedure
This section provides detailed instructions for configuring a flow procedure.
[Diese Nachricht wurde von dabauer82 am 09. Jun. 2011 editiert.]
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