HOW TO PERFORM SHELL TO SOLID SUBMODELING IN ABAQUS PDF
See “Shell-to-solid submodeling and shell-to-solid coupling of a pipe joint,” Section For example, a static analysis performed in ABAQUS/Standard can drive a. Perform solid-to-solid, shell-to-shell, and shell-to-solid submodeling. Targeted This course is recommended for engineers with experience using Abaqus. script to perform the steps of the method in an automatic manner. Using the Keywords: Abaqus, Ansa, Meta, Submodelling, Multiscale analysis, Polymers .. scales from shells to solids, further constraints must be introduced, increasing the .
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The script ends by displaying an overlay plot of the global model and the submodel in the Visualization module. The continuity of displacements and the minimal distortion of the stress field at the shell-to-solid interface indicates that the shell-to-solid coupling has been modeled accurately. Node definitions for the reference model with C3D20R elements.
Mode-based steady-state dynamics cannot be used at the submodel level. The maximum nodal Mises stress in the fillet shbmodeling is 56 MPa, and the x -displacement at the coupling constraint reference node for the global shell model due to the 10 N load is.
These values affect only field-variable-dependent material properties, if any. No parameters are used when fixed boundary conditions are specified as model data No parameters are used when fixed boundary conditions are specified as model data.
The results will be most accurate if the frequencies at which the response in the submodel is requested match the frequencies at which the response was calculated in the global model.
You specify the step of the global model history that is to be used for the driven variables in the current submodel analysis step. The continuum meshes used in the go submodeling and shell-to-solid coupling analyses are identical.
If interpolation between dissimilar meshes is necessary, the global output database file must be used to read the temperatures. Optional, mutually exclusive parameters for matrix generation and direct-solution, steady-state dynamics analysis history data only Submodeeling, mutually exclusive parameters for matrix generation and direct-solution, steady-state dynamics analysis history data only: The only restriction on the specification of the frequency range in the submodel is that the minimum and maximum frequency should lie within the range of calculated frequencies in the global model.
If the global model is defined in terms of an assembly of part instances or the output database is used to transfer results from the global model to the submodel, the part.
The global model can contain both solid and shell elements; however, when the shell-to-solid capability is used, all driven nodes must lie within shell elements in the global model. The acoustic pressure from the global model is interpolated to the submodel driven nodes. If the global model is defined in terms of an assembly of part instances, peform the submodel is not, the dots in the global element set name must be replaced by underscores, e.
Unlike shell-to-solid submodeling, which first performs a global analysis on a shell model followed by a submodel analysis with a continuum model, the shell-to-solid coupling model uses a single analysis, with solid and shell ahaqus used in different regions.
Scale time period of global step to time period of submodel step. In general, accuracy can be checked by comparing contour plots of important variables near the boundaries of the submodeled region.
The boundary nodes cannot lie in regions of the global model where there are only user elements, substructures, springs, dashpots, etc.
If a shell offset is defined in the global model, the shell thickness must be set equal to twice the maximum distance from the top or bottom shell surface to the shell reference surface.
In this case ABAQUS expects that all the driven nodes on the submodel belong to solid elements and are driven from a global model region that is entirely made up of shell elements.
Specifying the driven nodes does not activate the driven variables: The pipe is subjected to a concentrated load acting in shsll x -direction applied at the free end, representing a shear load on the pipe.
If this parameter is used, any magnitudes given on the data lines are ignored. The example could also be expanded by including plastic material behavior in the submodel while using an elastic global model solution.
Use both of the following options: Shlel definitions for the shell-to-solid coupling model with C3D10 and S4R elements. Run a heat transfer analysis of the global model, and write the nodal temperatures to the shfll or output database file.
Defining primary and secondary bases for modal superposition procedures. The acoustic nodal pressures from the global analysis must be written to the results file for the acoustic mesh in contact with the structural surface of interest.
Some hosting offices also allow for in-person attendance. You can specify different shell thicknesses if, for example, a local thickness change is being investigated; however, ABAQUS does not check the validity of these differences.
The continuum meshes extend 10 mm along the pipe length, have a radius of 25 mm in the plane of the plate, and use four layers through the thickness. A reference static solution consisting entirely of C3D20R continuum elements is also included see Jow 4.
Shell-to-solid submodeling and shell-to-solid coupling of a pipe joint.
Online-Submodeling with Abaqus
The submodel can refer only to a global model results file that is from a binary compatible platform. Run a sequentially coupled thermal-stress analysis the global thermal-stress analysis using the same mesh mesh1 as the global heat transfer analysis and the temperatures from the results or output database file for the global heat ih analysis.
Submodeling with general and linear perturbation steps. The continuity of displacements and the minimal distortion of the stress field at the shell-to-solid interface indicate that the shell-to-solid coupling has tto modeled accurately.
The value of the TYPE parameter is ignored when this option is used. To avoid this problem, write the nodal output to the output database or the results file using the same frequency for all nodes involved in the interpolation and choose a frequency that will allow the history in the submodel to be reproduced accurately.
Node number or node set label. Model or history data.
However, if we restart the submodel analysis sumbodeling the same way, the solution may not be comparable with the global model solution: In shell-to-solid submodeling, the submodel is made up of solid elements and replaces a region where conventional shell elements are used in the global model.
Set this parameter equal to the name that will be used to reference the boundary condition in user subroutine VDISP. Then the distance, Dbetween the driven node and its image is checked; if the distance is less than half the value of the specified shell thickness plus the exterior tolerance, it is accepted. Thus, only one layer of driven nodes lies within the center zone, and only these nodes have all three displacement components driven by the global solution.