Israelkk:
This is a solenoid type of valve design; however, I am not experienced with it and therefore my responses tend to be incomplete, thank you for bearing with me.
An FEA is the best way and we are pursuing that route. The slot width is .02" and the selected material is 17-7 ph cond...
Hello,
I am in need of some guidance on how to approach a stress analysis for this part. It is odd by its spiral design etched out of the annulus, see attached sketch (.PDF).
http://www.yourfilelink.com/get.php?fid=7997
The inner edge is simply supported and the outer edge is guided. The...
This analysis is to find out how things change with thickness and load, so we can know what is acceptable. Attached is a more accurate sketch of the flexure.
We want it thick enough capable to handle 10XE6 cycles and finding the deflection with a 1 lb. load at the inner edge with the outer...
Hello:
Deflection is what we are analyzing as well as stresses.
Installed the flexure is under .007" deflection. the spring force is 1.5 lbs and the two flexures are overcoming the spring force. The flexures are moving in both directions when the open/close poles are actuated.
It is not symmetrical because it is an undimensioned hand drawn sketch. All three bands are 120 deg. apart and start start at a radius (.160) from the center. This has not been drawn onto a Solid Works model, I am having difficulty drawing the spiral design.
There is a clamping land on the OD...
Actaully it is symetrical, the sketch is poorly drawn. there are three symetrical bands. First band starts at 30 Deg. and ends 300 deg. The hole pattern is an old design sorry about that.
http://www.yourfilelink.com/get.php?fid=5613
Hello,
Yes, the flexure spring is similar to our design.
The attached link illustrates a sketch of the design.
http://www.yourfilelink.com/get.php?fid=5591
Unit is a bipropellant space component designed with no sliding parts. The flat spring, which is identified as a flexure, it has an OD (3/4"), ID (1/4"), and in between there is an etched spiral type design that frees up some of the stiffness of the flat spring. The flexure is clamped on the...
Thanks guys for the input.
I have been looking at the formulas for annular plates on Roarks. However, what throws me off is the spiral etching between the OD and the ID. Do I need to analyze that as a separate beam? My company has yet invested in an FEA package.
Anyone has experience with flexures (thin annular plate, with an etched design) that acts as a spring? The flexure is used as a centering guide and provides a spring load.
I am not sure on how to approach a stress analysis.
Any input would greatly be appreciated.
