abaqus steps
DESCRIPTION
Abaqus steps for Extrusion processTRANSCRIPT
ABAQUS
By
Dr. P.P.Dey
Associate Professor
Bengal Engineering & Science University, Shibpur
Howrah
December 2012
ABAQUS
Abaqus is a suite of powerful engineering simulation programs based on the finite element method, sold by Dassault Systmes as part of their SIMULIA Product Life-cycle Management (PLM) software tools.
Abaqus/CAE main window
Module
STEPS INVOLVED IN ABAQUS FOR MODELLING AND SIMULATION OF THE ANALYSIS
In Abaqus/CAE, the whole modelling of the extrusion process is divided into eight modules.
Part
Property
Assembly
Step
Mesh
Interaction
Load
Job
Under Part module, three axisymmetric parts in the viewport are created by giving the coordinates in the promt area.
Part-1 Billet
Part-2 Die
Part name
Part-3 Reference Node
Part Module (Sketch)
Under Property module, the material property is created. In this analysis two material properties are created.
Metal
Rigid
The two material properties are assigned to these sections.
Three sections are created. The names are as follows:
Billet-section
Die-section
Ref-section
Saving and Defining Material Properties
Under Assembly module, in create instance the three parts billet, die and reference node are assembled together
Assembling the Parts
Step
Under Step module, four Steps are created, procedure is coupled-temp-displacement.
Step-1: Stabilize the workpiece inside the die
Step-2: Extrusion
Step-3: Remove the contact pair
Step:4 Let the workpiece cool down
Create step
In step-1
Time period-1 sec
Incrementation type-Automatic
Max. no of increments-100
Max. Allowable temperature change per increment :1000 C
Solution technique is contact iteration
In step-3
Time period-0.1 sec
Incrementation type-Automatic
Max. no of increments-200
Max. Allowable temperature change per increment :1000 C
Solution technique is contact iteration
In step-2
Time period-1 sec
Incrementation type-Automatic
Max. no of iteration-800
Max. Allowable temperature change per increment :1000 C
Solution technique is contact iteration
In step-4
Time period-1000 sec
Incrementation type-Automatic
Max. no of increments-200
Max. Allowable temperature change per increment :1000 C
Solution technique is contact iteration
Interaction
Create Surface
Two surfaces are created.
Die Surface & Billet surface
Interaction properties are created.
Name-FRIC-INTER
Type- Contact
Contact properties options are-
Tangential behavior
Normal behavior
Heat generation
Geometric properties
Two interactions are created. Names are-
INTER. Type- Surface-to-surface-contact, Created in Initial step, propagated in step-1&2 and Inactive in Step-3&4
FILM CONDITION. Created in Step-4
Create interaction properties
Create interaction
Constraint is created.
Type- Rigid body
Reference point is selected.
Seed Mesh
Under Mesh module, for each part the seed edges are done, where the size and the number of seeds are given.
Seed edges
Mesh
In Mesh module, meshing is done individually on each part.
Assign the Element type. Element type is Coupled-temp-displacement-CAX4T.
Mesh Part
Assign Element type
Mesh Part
Creating Sets
For prescribing BC. Three node sets are created.
Axis
Top
REF
Load
Seven BCs are created.
BC-1. Created in Step-1 and propagated in Step-2,3 &4.
BC-2, BC-3, BC-4, BC-5 & BC-6. Created in Step-1 and inactive in remaining steps.
BC-7. Created in Step-2 and propagated in remaining steps.
In the 1st step,
At REF node set,
U=0, V=0, and UR3=0
At AXIS node set,
U=0
In TOP,
V= -0.000125
In REF (Picked up in viewport)
Uniform temperature-20o C
In the second step, At TOP
V= -0.25
In Predefined Field, in metal bar node set,
Temperature set is 200 C
Job
Job is created
Name is given
Type is full analysis
Create job
Visualization
In visualization module, the result of the analysis can be read.
Contour plots and graphs can be plotted in visualization module.
Plot undeformed shape
Plot contours on
deformed shape
Plot deformed shape