Weekly Presentation

ABAQUS TutorialBing Ye

February 23, 2006

Outline

ABAQUS ScopeABAQUS Problem-Solving StepsABAQUS DrawingABAQUS MeshingABAQUS HOWTOSummary

ABAQUS Scope

Perform meaningful linear and nonlinear analysis. Typical cases:

This world is non-linear.

o Large motion of an elastic-plastic pipe hitting a rigid wall; o Inelastic buckling collapse of a thin-walled elbowo Explosive loading of an elastic, viscoplastic thin ringo Consolidation under a footingo Buckling of a composite shell with a holeo Deep drawing of a metal sheeto ……

ABAQUS Problem Solving StepsPreprocessing

ABAQUS/CAE or other

Input File: job & inp

generate

Simulation with Standard or Explicit Module

Submit Job

Output Filesaccessed by Python

PostprocessingVisualization

Model Tree

ABAQUS Startup Image

ABAQUS Drawing1. Point2. Line3. Area

Sketch

Operate

Forming 3D Volume

Select 2D plane as reference to expand and modify

Part

Individual part can be duplicated and then modify to form new part.

Forming your final modeling object

Assembly

Module name

Operate:

1. Extrude

2. Revolve

3. Sweep

Assembly

1. Individual part: Translate, rotate

2. Two part: Face to face, coaxial, edge to edge, ….

Note: Different parts in assembly have NOinteraction 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 RelationsInteraction is to tell ABAQUS about how the parts and parts

interact and self-interact.

Workout ExampleIn contact, many times it is hard to choose the contact plane from the

assembled part. 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

Since ABAQUS only checks the nodes of the slave planes, we selected the planes with large deformation as slave planes.From material point of view, we usually choose soft material (finer meshing) as slave planes (regions). Same material does not matter.

An Example Same material different meshing

Displacement contourvon-Mises stress contour

Meshing --- Partition to Form Simple Part

How Simple is called Simple?

Color is Green. Color Orange --- Too Complex.

Meshing StepsTry 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

ABAQUS is user-friendly and easy.ABAQUS HOWTO: learn two examples in Appendixes B and C of book “Getting Started with ABAQUS”.Hope all of us start to rock-and-roll with ABAQUS.