I am modeling a piezo electric slab with coupled field elements. I have activated the following dof's: ux,uy,uz,and volt. I believe that one of my constitutive equation then should be the following:
electric flux =(stress*compliance)+(piezo matrix*E field)
in the absence of electric flux...
I am currently using coupled field elements to model a beam made of PZT. Using a force input on the beam (opposite of the fixed end) I have seen non-zero voltages at all the nodes. Now, I would like to simulate the presence of electrodes on both the upper and lower surface of the beam. I want...
I am hoping to pattern a feature that directly proportionally (linearally) reduces in size as the pattern advances across a straight line sketch. What is the best way to make this happen? Should I define the original feature's dimensions using equations? Thanks,ProEdj
Hello,
It seems that when I run a harmonic analysis the magnitude all of my applied forces including gravity are based on a sin function. I am fine with this for gravity, because I am essentially performing a vibrational analysis at a set frequency using gravity as my vib load. My applied...
Tunalover,
I think you raise a good point about reoccurring parts, such as washers, that could be overwhelming. I have heard of many companies using a "stop order" within their codes such that once 3 parts with the same item number are recognized then this item number will be skipped, and the...
Well,
I think the code must be adaptable to the each drawing format. The code will first read the format's grid indices. In my case for a 17x11 in drawing (B-size) this would be from 1...8 on the x-axis to a...h on the y-axis. Once it has established this it will then scan the drawing, or...
Hello Everyone,
Has anyone came across a code that reads where parts exist on an a pro-e assembly drawing then can output that grid zone into a table in the BOMS? When I say grid I am refering to the numbers along the bottom and the letters on the side of a drawing that divide a drawing into...
Hello Everyone,
Has anyone came across a code that reads where parts exist on an assembly drawing then can output that grid zone into a table in the BOMS? When I say grid I am refering to the numbers along the bottom and the letters on the side of a drawing that divide a drawing into zones...
Yes, creating a simplified rep is what I am essentially doing by saving a copy then modifying the part. But what my concern is the time required to dumb down a part if I have to go back to the virgin parts that were merged and into the patterns in which I only want a portion of the contents...
Hello,
I am attempting to do some mechanica analysis on a complex pro-e part that was created using merged objects and numerous hole pattens that have significant instances. I need to simplify the part so this analysis can be done. I have saved a copy of this part and called it something...
I am doing an modal analysis on a circuit board that sits on a gap pad. This gap pad is designed to dampen vibration and also produce sufficient conduction to cool the board. It seems that applying a sping to the board is a logical way to represent this, yet I do not see a suface to surface...
I was hoping to do a Pro-Mechanica or Ansys FEA analysis to determine the mode shapes and resonant frequencies of a board. I will also back this up with a hand calculation of the natural frequency. Both of these task require the Elastic Modulus, poisson's ratio, and density. I would actually...
I have seen quite a wide range of Elastic Modulus values for polyimide pwb boards. Does anyone know of a reliable source that I can utilize to do a vibration analysis on a printed circuit board.
Thanks
What is the best way to call out a slot? I have used basic dimension to reference the true center of the slot from 2 perpendicular datums. Then I called out the width of the slot and the height (the length from one tangent line off the full radius to the other tangent line) using standard...
Ok. To clarify my situation a little further, I am drilling then reaming my dowel pin hole to be .2500''+.0000/-.0003. My dowel pin's diameter is .2501-.2503. This way in the worst case senerion I have an interfence of .0001. The most interference I have would be .0006. Using stress fomulas...
When calculating the stresses created when press fitting dowel pins how important is it to stay within the yield stregth of the material? I am having a difficult time achieving this when using 316 stainless steel plates and pins. I have speced my pre drilled dowel pin hole all the way down to...
Hello Everyone,
When applying gravity loads in Pro Mechanica, it seems logical to me to select a unit system that that uses mass/length^3 units not force/length^s. Therefore when operating in English units I would like to use slugs/ft^3 for density. I feel like using pounds already...
Hello,
I was hoping to generate a group of parts that are defined by the same features but possesing different dimensions. For instance, a group of screws with the same head size, thread pitch, and shaft diameter, but with variable shaft lengths. Is it possible to generate this group of...
