## General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

#### Creating an asymmetric shape in Design Modeler

Subscriber

I want to generate an elliptical part with a 1.5-mm extrusion, but I don't know how to make it asymmetrical. Can somebody assist with this in more basic dimensions?

I initially made two ellipses and extruded them to a thickness of 1.5 mm. Next, I made a rectangle with a height of 1 mm and stated, "Cut material," which caused the component to be cut with a 1 mm gap. However, I now want one end of the part to be 1.5 mm higher than the other. How to perform

• Nanda Veralla
Ansys Employee

There might be someway of modelling it in CAD interface itself, but I'm not aware of it. I do have a way of doing this in Workbench. Use this model in Static structural analysis system. For one of the end face use fixed support, and for the other face, use a displacement load of 1.5mm in one of the axis and 0mm displacement to other two axis. You will get your deformation plot from total deformation.

You can export this deformed geometry into a new analysis system and use it as a new geometry. You need to map solution cell of old system to model cell of new system.

This is one way of doing it, I'm pretty sure there might be some easy CAD modelling featuring itself to generate what you want. Hope this helps.

Regards,

Nanda.

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Subscriber

I would like to clarify that my requirement is not limited to creating just the individual component. Instead, I intend to incorporate this geometry within a conical-shaped polymer. By designing the geometry in this manner, I will have the flexibility to parameterize the distance between the polymer and the specimen, which would provide better control and adjustability for my project.  Do you any idea about creating this geomtry in design modeler or spacelaim?

• Nanda Veralla
Ansys Employee

Could you provide further information like a rough sketch or photocopy of what you're trying to model. This will make us understand your issue with large number of audience, so that you'll get a solution as soon as possible.

Thanks.

Subscriber

I would like to create a geometry similar to the one shown in the attached photo, using the provided measurements as a reference. Outer part is polymer with metal inlay inserted into it.

• peteroznewman
Subscriber

In SpaceClaim, on the Design tab is the Equation button.  Here you can make a Helicoid shaped surface.

Then use the Pull tool to add thickness to the surface.

The shape of this part is circular. If you are good at math, you can modify the equation and type in the formula for an ellipse, but I will make a sketch, draw an inner and outer ellipse and extrude those to cut this solid.

This shows how to make the shape you first asked about which has edges that are spirals.  The last image you show has a ramp feature and can be constructed without starting with a helicoid.

• Nanda Veralla
Ansys Employee

I just tried what peter suggested, it worked for me. Try it from your end and mark peter's comment as "Solution answered", it will help other user's who are looking to build similar geometry.

Thanks

Subscriber

Hello, By  putting those values you shown above , the figure is making like this after extruding but i want upper face to be exactly at top of bottom face. i provided the sketch above so my question what values should i put in equation to get exact figure like my sketch. Thank you!

• peteroznewman
Subscriber

Change the value of c to make the two ends go edge-to-edge.

Subscriber

which value should i put of "C" to get geometry mentioned above. Can you give me exact value of "C"and other parameters?

• peteroznewman
Subscriber

The value of "C" is the thickness of the Pull you will do to make the surface into a solid.

Subscriber

but after putting value of C as -1.5 is showing some gap between upper and lower part as show in above figure.

• peteroznewman
Subscriber

Look at the equation, it says z = c * v

v goes between 0 and 6.28 so the step in the surface is 6.28*1.5 = 9.42

Let the thickness of the Pull be t.

t = 6.28*c

Solve for the value of c.