7 Replies Latest reply on Dec 12, 2014 12:30 PM by Jamil Snead

# keep area of a closed sketch constrained when chaging dimensions

Hi Everyone.

I'm trying to divide a shape into segments of equal areas, whilst changing the widths.

The overall shape is a rectangle with large radiused corners. (449*452mm with 100mm radius on all corners) I want to divide this shape into 36 sections of equal area. At the moment I am envisioning this as a 6X6 grid. Is there any way that you can constrain areas in solidworks to achieve this?

I can provide a sketch of what I mean if this helps.

Pete

• ###### Re: keep area of a closed sketch constrained when chaging dimensions

This might be easier to understand if you provide a sketch. It sounds like you problem is over constrained. I don't think SolidWorks has an area constraint, but if your problem isn't over constrained, you can create one with either equations or a design table.

• ###### Re: keep area of a closed sketch constrained when chaging dimensions

This is the shape that I want to divide into a 6 x 6 grid, with each of the areas of each "section" of the grid being equal.

I hope this helps make it clearer what I need

Thanks

Pete

• ###### Re: keep area of a closed sketch constrained when chaging dimensions

I would extrude the sketch into a solid then use the fill pattern command to generate the 6 x 6 grid.

• ###### Re: keep area of a closed sketch constrained when chaging dimensions

Sorry, I don't think i'm explaining myself correctly.

This is the kind of thing I am trying to achieve, However all of the sections within the grid must have the same area. Due to the radius' on the corners of the outline, the widths and height of the sections must differ slightly. I just guessed at the dimensions for this grid, and the areas will not be equal. Is there a method I could use to make sure that the areas are equal?

I know the area that each one should be by calculating the area of the outline and dividing it by 36. I hope this is clearer now?

Pete

• ###### Re: keep area of a closed sketch constrained when chaging dimensions

I fooled with it a little bit and didn't have much luck.  It's easy enough to extrude the shape, get the surface area with the Measure tool, then divide that by 36 and get the square root of that number.  That's the length of each side of the 16 square in the middle, but then the blocks around the outside are wrong.  (At least I think that's right, it's been a long time since I was in school and I'm not an engineer.)