This is a situation where the customer did not require a spec, but the sales engineer wanted some piece of mind that the product would endure application environment. This aforementioned vibe spec is a spec that he used a while back to test another product for a seperate,but similar type of...
The following vibration spec came across my desk almost on a cocktail napkin.
Vibration/ Shock Spec:
Frequency Range: 10Hz to 40Hz; amplitude = 0.1” p-p
40Hz to 2000Hz; acceleration = 4g RMS
Frequency Period: 30 minutes; 10Hz to 2000Hz and return
Test Time: 3 hours...
If you are concerned with buckling you can always brace the shaft at an intermediate location. The shaft then would have to buckle in the second mode, which will increase your critical load.
Failure is a prerequisite of successful design
Like TheTick states, you should ask QA to quote this privy "CL" business. Show them how all the cylindrical drafting examples pulled from Y14.5-1994 provide dashed center lines without employing the letters "CL"
Failure is a prerequisite of successful design
Hi,
I'm interested in properly specifying the bore for a keyed sprocket hub. The 2" sprocket will sit over a 3/4" drive shaft that rotates ~3rpm and ~1000 lb load. Everything has been sized except for the fit class.
I have just about exhausted my internet resources looking to find which...
One of the downfalls of email is they are often misconstrued because they are read out of context. Suspicions and presumptions from your sub-conscious are actively interpreting or setting the mood of the letter. So if you've felt in the past that he is offensive you probably will tend to...
Have you tried a factory service manual? The hydraulic and electric schematics are usually present.
As far as pressures required, that depends on other dynamics such as load,acceleration,friction surface etc,etc,etc.
Failure is a prerequisite of successful design
First of all the system is unstable as it looks. I'm sure there is some sort of actuator that attaches to the parallel arms or Suspension Upper Plate which needs to be included as an external force/reaction in the analysis.
Observing the OPs pics there is indeed 4 "Pins" which he has...
If you simplify the suspension upper plate as part of the parallel linkage, this is the Force analysis result...
See attached.
This pic looks like it is from MGA's FMVSS Test Fixture
Failure is a prerequisite of successful...
You can reduce the number of unknowns once you realize that the links in your parallel linkage are 2 force members. Being two force members you can deduce the sense (direction) and solve for magnitudes.
Failure is a prerequisite of successful design
Observing the radial cracks I also notice a subtle texture difference which appears to create a circular fine grit pattern just a little off-center (quadrant II for geometry gurus). This is typical in variable loaded shafts subject to torsional loads. The presence of cracks stemming from the...
How about a combination corrugating or forming the sheet-metal
so that it will add stiffness across the plane that you need it. With this added stiffness you might be able to cookie cut some material out of the sheet, ergo weight reduction.
Tom
Failure is a prerequisite of successful design
The drawing block does not contain a specification for the tolerance range of a 0 .X callout. I agree that one has no other option than to logically resort to sig-figs. But realistically there is a narrow likelihood of an inspector or machinist of recalling sig fig rules with enough confidence...
Sorry about that, just American colloquialism, yes gasoline.
And yes, Rubber Maid makes a gasoline container.
Failure is a prerequisite of successful design
Hello,
I noticed ASTM F852-99 on the side of my rubber maid gas container and am now curious of the regulations.
Is anyone familiar with ASTM F852-99 standard for portable gas containers? If you've ever run across it, what are the main requirements of the standard?
Thanks
Tom
Failure is...
