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Importing Part Geometries and

Assembling in ABAQUSWritten by D. MathisLayout of Steps

1. Create Geometry indesired CAD package

2. Save file format in .igs,.sat (other formatsavailable)

3. Geometrically Assemblein ABAQUS

4. Create tie constraints

between parts

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Creating Geometry in CAD

Package For this example, a simple box was

created in Pro-E This box was then saved as an .igs file,

but other file options are available Once the part has been created and

saved, select File in the ABAQUS toolbar,and scroll down to Import, and select part

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Importing Part

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Importing Part

A window will now pop up that allows you

to locate your saved part Note the variety of file extensions

available, but for this example the .igs fileextension was used

Choose your selected part file andextension, and select ok

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Choosing File & Extension

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Importing Part, .igs format

After clicking ok, a new window will pop up

that allows further import options of thechosen parts

You can now choose whether you wish to

import the part in a solid, shell, or wire-frame topology

The solid topology was chosen here since itwas desired to model a solid part

After having chosen your topology, click ok

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Importing Part, .igs format

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Importing a Second Part

For this example, a second box was

imported from the same saved part Repeat the previous steps of importing the

selected part, but on the Create Part froman Igs file window, select the scale tab

Click on the Multiply all lengths optionand type in 0.5. Now click ok.

A smaller box will now be created

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Scaling the Second Box

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Assembling the Parts

Now click on the Assembly Module

From the Assmbly Module, click on the instancepart option

Choose your selected parts, and click on the

Auto-offset from other instances option. Thisoption will keep your parts from initiallyoverlapping.

In order to be able to separately mesh the twoparts, choose the dependent option

Click ok

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Starting the Assembly

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Moving the Parts

You should now see both of your parts in

the view-port window For this example, the smaller box will be

moved to the upper corner of the big box To do this, click on the Translate Instance

Button, and select the smaller box

Then click done

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Moving Part

Now, select a point on the corner of the smaller

box that you want to move to the upper corner ofthe larger box

Now select a point on the corner of your larger

box where you wish point of your smaller box tomove to

The smaller box will now move to the selectedpoint

Click ok, in the bottom of the view-port window

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Geometrically Constraining the

Parts The smaller box now has to be

geometrically constrained so that it iscorrectly positioned on the larger box.

Click on the Constraint option on theToolbar. Note the different constraintoptions that are available

Here, choose the face to face option

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Geometrically Constraining the

Parts Now, we need to choose the face on the

smaller box that is currently butted upagainst the larger box. To choose thisface, select the Show/Hide Selection

Options that is located at the bottom of theview-port.

A options window will now pop up, click onthe Select the Entity Closest to thescreen to turn this option off

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Face to Face Constraint

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Face to Face Constraint

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Face to Face Constraint

Arrows will now appear on the figure

Use the flip option at the bottom of theview-port to make sure the arrows are

pointing in the same direction Click ok

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Face to Face Constraint

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Edge to Edge Constraint

The edge of the smaller box now has to be constrainedto the larger box

To do this, select Edge to edge in the Constraint Toolbarpull-down Now choose one of the edges of the smaller box, and

then the respective edge of the larger box. Note that is

easier to select if you turn off the Select the EntityClosest to the screen feature. Again, make sure thearrows are pointing in the same direction

Repeat this for the other edge. Note that the The

instance "box_1-1-1" is fully constrained messageappears in the lower text box once the box is fullyconstrained

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Creating Tie Constraint

Now that the parts have been assembled,

ABAQUS now needs to know how tophysically tie the two parts together

This will be accomplished here by usingthe Tie Constraint, which fuses the face ofthe smaller box to the larger box

To do this, click on Constraint in the filelibrary

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Creating Tie Constraint

A new constraint window will pop up, andchoose the tie constraint. Note here there are

multiple options for these constraints Now, choose the Master surface, which is the

face of the larger box and click done

Next, choose that the slave type be a surface Choose the face on the smaller box that is

butted up against the larger box.

Click done A new window will be brought up to edit the

constraint select ok

Ti C t i t

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Tie Constraint

N t M hi d P t

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Note on Meshing and Parameter

Defining The Part has now been completely

assembled and tied together. It shouldnow be noted, however, that meshing ofthe parts and section assignments shouldnow be done in the File library under therespective parts.