9Perform meaningful linear and nonlinear analysis. 9Typical cases: o o o o o o o
Large motion of an elastic-plastic pipe hitting a rigid wall; Inelastic buckling collapse of a thin-walled elbow Explosive loading of an elastic, viscoplastic thin ring Consolidation under a footing Buckling of a composite shell with a hole Deep drawing of a metal sheet ……
ABAQUS Problem Solving Steps Preprocessing ABAQUS/CAE or other generate Input File: job & inp Submit Job Simulation with Standard or Explicit Module
Output Files accessed by Python Model Tree Postprocessing Visualization
ABAQUS Startup Image
ABAQUS Drawing Module name
1. Point 2. Line 3. Area
Sketch
Operate
Select 2D plane as reference to expand and modify
Forming 3D Volume Individual part can be duplicated and then modify to form new part. Operate: 1. Extrude 2. Revolve 3. Sweep
Part Assembly
Forming your final modeling object
Assembly 1. Individual part: Translate, rotate 2. Two part: Face to face, coaxial, edge to edge, ….
Note: Different parts in assembly have NO interaction even they are physically contacted.
Workout Example
100 cube with a 50 radius 1/8 ball How to draw this in AutoCAD or SolidWorks? We draw with ABAQUS/CAE
Sketch Part I
Sketch Part I --- cont’d
Adjust length
Sketch Part I --- cont’d
Sketch Part I --- cont’d
Need: Extrude from the Top
Select Plane for Part II
Sketch Part II
Sketch Part II --- cont’d
Part II for Extrude
Finished Part
Easy !!!
Interaction --- Parts Relations Interaction is to tell ABAQUS about how the parts and parts interact and self-interact.
Workout Example In contact, many times it is hard to choose the contact plane from the assembled part. Î Define the surfaces in the assembly by showing one part at a time.
Part Assembled with two parts Want these two parts tied together by two planes in the middle.
Define Surface
Define Surface --- cont’d
Define Surface --- cont’d
Define Surface --- cont’d
Define Interactions
Define Interactions --- cont’d
Define Interactions --- cont’d Select Master and Slave planes
Define Interactions --- cont’d
Define Interactions --- cont’d
Define Interactions --- Summary ¾ Since ABAQUS only checks the nodes of the slave planes, we selected the planes with large deformation as slave planes. ¾ From material point of view, we usually choose soft material (finer meshing) as slave planes (regions). ¾ Same material does not matter.
An Example Same material different meshing
Displacement contour
von-Mises stress contour
Meshing --- Partition to Form Simple Part
How Simple is called Simple? Color is Green. Color Orange --- Too Complex.
Meshing Steps Try to turn everything into green by cutting parts (virtually because they are still connected and cutting is just for meshing).
Using these tools
Meshed Part
Summary ¾ ABAQUS is user-friendly and easy. ¾ ABAQUS HOWTO: learn two examples in Appendixes B and C of book “Getting Started with ABAQUS”. ¾ Hope all of us start to rock-and-roll with ABAQUS.
