ANSYS - Crank - Step 2

Step 2: Geometry

In the Crank cell, right click on Geometry, and click New Geometry...

 
At this point, a new window, ANSYS Design Modeler will be opened. You will be asked to select desired length unit. Select Inch unit and click OK.

Creating a Sketch

Like any other common CAD modeling practice, we start by creating a sketch.

Start by creating a sketch on the XYPlane. Under Tree Outline, select XYPlane, then click on Sketching next to Modeling tab. This will bring up the Sketching Toolboxes.

Note: In sketching mode, you there is Undo features that you can use if you make any mistake.

On the right, there is a Graphic window. At the lower right hand corner of the Graphic window, click on the +Z axis to have a normal look of the XY Plane.

Under Sketching Toolboxes, click on Draw tab. We will first create the outline of the crank. Select Rectangle and draw in the Graphics window as shown below. Make sure that the rectangle is coincident on the x-axis (Letter C visible when you start the rectangle drawing).

 
Note: You do not have to worry about geometry for now, we can dimension them properly in the later step. Next draw the semi-circular arc at both end of rectangle. Under Draw Tab, select Arc by Center and execute the drawing as shown.

Draw the crank circular hole next. Under Draw tab, click on Circle and execute the drawing as shown.

Next, we will dimension the current drawing. Under Sketching Toolboxes, select Dimensions tab. You will see a list of dimensioning options. We will use the default General option. Execute the geometry dimensioning as shown below.
 
Input value for D2, H3, L1 respectively under Details View tab.
D2 =  0.5 in
H3 = 3.3465 in
L1 = 1.299 in
 
Note: Your dimension naming might not be the same as the one shown here. It is fine. Just make sure your value correspond to correct geometry.
 
Next, we need to make sure that the sketch is symmetry on both side. Under Sketching Toolboxes, select Constraints tab. Select Midpoint and constraint the geometry in the Graphic window as shown below.
 

 
Next, we will make sure that the both circular hole is of same dimension. Under Constraints tab, select Equal Radius. Execute constraint in the Graphic window as shown below.
 
We will next trim off the unwanted edge. Under Modify Tab, select Trim. Execute the trimming in Graphic window as shown below.
 

 
At this point, we have the outline of the crank done. We need to add the 

Select Rectangle. Create a rough Rectangle from starting from the origin in the positive XY direction (Make sure that you see a letter P at the origin before you start dragging the rectangle. The letter P at the origin means the geometry is constrained at the origin.

You should have something like this:

Note: You do not have to worry about geometry for now, we can dimension them properly in the later step.

Modify the Sketch

Since we have a heated section in the middle of the pipe, we need to split the geometry appropriately. Click Modify tab and select Split. Roughly select four points on the top and bottom of the rectangle where there will be heated section.

Dimensions and Constraints

Now we will specify the appropriate dimensions and constraints. Below is the summary of geometry of the pipe:

Radius: 0.0294 m
Length: 6.096 m
Heated Section: 1.83 m - 4.27 m

Select Dimensions tab, use the default dimensioning tools. Dimension the geometry as shown:

Under Details View on the lower left corner, input the value for dimension appropriately.
V1: 0.0294 m
H2: 1.83 m
H3: 4.27 m
H4: 6.096 m

Now we can constraint the lower rectangle with the top of the rectangle which has been properly dimensioned. Click Constraints tab, select Equal Length. Click the appropriate top and bottom edge and set them to be of equal length.

At this point, you should see something like this for your sketch:

Now that we have the sketch done,

Go to Step 2: Geometry

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