Thank you sir. I couldn't find anything in my old textbooks or Machinery's Handbook on this but I did find information on the web leading me to an equation for a distributed load on a circular plate with clamped ends. The resulting displacement is reasonably close to the displacement I get...
Can't say I didn't expect that...I'm a bit rusty. I'm sure we will do it "the good 'ol way" but I'm still want to try and figure this out.
Can't you give me a hint?
Hola forum,
We are modifying an existing nozzle (20" I.D. X 8" high X 63" thick hoop) to perform pressure testing on the lid that it mates to. We intend to close off the other end of the nozzle by welding a plate to the bottom of it. We've done this before with the old fabricator "that'll...
Hello Forum,
I'm using a rectangular wire torsion spring in a safety device to indicate applied torque. The assembly environment is outdoors and cycles in lifetime < 500.
min tensile strength (not min yield) = 256 ksi
max design stress = 167 ksi
preload stress = 110 ksi
I just wanted to...
Hello Forum,
I'm reverse engineering a brass water fitting in a low pressure application. On one side there is a face/flange seal with an O-Ring groove that matches traditional O-Ring gland dimensions. The other side has a radial O-Ring seal with 2 grooves for 2 O-Rings. Those grooves do not...
Bingo. Thanks for clarifying! I guess I can't use these Design Stress curves for round wire torsion springs on pg 317 of the 27th Ed of the Machinery's Handbook accurately then.
Hmmm that makes it more confusing... The torsion spring formula page leads me to believe otherwise, at least in bending. The bending stress is lower in the square wire when using the same 'd' Can you clarify?
You say the tensile is lower with a square wire, despite the cross sectional area...
I'm using the Machinery's Handbook to design a torsion spring with square cross sectional wire. The Machinery's Handbook only gives fatigue stress curves for round wire springs. Am I correct in assuming that square wire springs have a higher allowable fatigue stress?
Please don't hate me for...
Hey Guys,
Sorry I've been away from work for a while, but I would still very much appreciate the Cl factor for the lateral spring rate. I haven't correctly sized the springs yet as I am new to suspension design therefore I cannot provide exact parameters. However, the application is rail so...
thanks desertfox!
I'm still in the very early stages of design, but the spring rate will be around 5000 lb/in. Do you know the approx range of the Cl factor?
Andrew
Hola Forum,
Does anyone have a formula to derive the shear spring rate of a compression spring? In other words, the spring rate in the plane perpendicular to the axis of the spring.
I've seen this provided from a German spring manufacturer (that I can no longer get a hold of) as a function...
Dear Forum,
I have a case of a stainless torsion spring (likely mat'l ASTM A313 Type 302 Class 2) of .10" wire diameter wrapped around a cast quenched and tempered Chromoly steel shaft.
The trick is the shaft has large heads on either side and must be cast in one piece so the torsion spring...
For the archives, the link below leads to a MIL spec that summarizes all the different CE formulae and their criteria for "good" (no preheat required) weldability.
http://www.metalwebnews.org/ftp/welding-design-TI-809-26.pdf
Thanks for all the replies!
I guess that's why you shouldn't trust wikipedia. The formula I was using included Si/6. Without that, CE = .45 (assuming Max Mn). Casting wall thickness in the area of weld is around .75" but these things have been used unchanged in the industry for decades.
Thank you,
I've seen the carbon equivalent formula (which puts A27 at %C = .583) and I know this material is very good for welding, however that is where my knowledge ends as far as relating %C to weldability.
Hello Forum,
Anyone aware of a scale comparing weldability of steel to carbon content? I am specifically attempting to compare ASTM A27 70-40 (%C = .25) to ASTM A148 90-60 (%C = TBD)
Gracias
Hey desertfox,
Shown in the picture is the "housing" the vertical post with the hole and the "shaft" running through it. The housing intermittantly rotates a total of 90 degrees in both directions. The shaft sticks out to lock the housing in various positions. Though these two are shielded...
hey desertfox,
sorry for the vague description. Temperature range is -50F to 130F and is also subjected to water and dirt. The sliding shaft and part housing the sliding shaft are both galvanized steel, however, i'm not sure I'll get the hole tolerance I want after galvanizing, so that may be...
