Posts by deajohn5556 



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Window for pressurized chamber made from laminated glass? 
Under 2 atm pressure (30 psi) I calcualte a stress of 2700 psi fo... 

Beam Stress 
You need to supply the length of the beam and then the calculatio... 

tapered beam deflection 
I agree, this is a difficult solution because the inertia is vary... 

What is membrane stress? 
Membrane stress is the tensile stress developed in the vessel.&nb... 

Properties of steels at high temperature 
MIL HDBK 5 has properties up to 800C and stress train diagrams up... 

Formula for calculating the pullout force of a screw from wood 
Yes, sure, this is standard strength of materials theory. I... 

Formula for calculating the pullout force of a screw from wood 
I would estimate the pullout force as
P = (PI)DtS/2 ... 

Split Washer design 
IThere is no lateral load unless acted upon laterally. If up to m... 

How to do stress analysis, etc 
If you are not taking a course, and are comfortable with equation... 

4 point bend testdetermining the yield strength? 
James
If you have load vs. deflection, for most materials, when ... 

Corrosion in steels 
When chromium is added to steel, from 1218%, the steel is made s... 

Stainless Steel 
Stainless steel contains 12%18% chromium depending on type. ... 

Surface finish notation 
I believe that would be the surface roughness in microinche... 

What bolts are strongest? 
Jay
As gerdb notes, you torque the bolt head (or nut) with... 

What bolts are strongest? 
Jay
Yes, the higher the grade the higher the strength; g... 

to get the deflection of the membrane 
In your first post you state central load and in your second you ... 

flexural modulus 
The formula is correct for three point bend simple beam: d ... 

Rp threads 
I am unfamiliar witht that also, , but apparently it is designa... 

stress singularity 
If you are looking at stresses at the internal corner of the I be... 

Qualifications to become a composites design engineer? 
A degree in mechanical engineering woul d be a good choice. I wo... 

Pounds Force of a dropped weight??? 
If you did mass times acceleration, how did u calculate the accel... 

Pounds Force of a dropped weight??? 
The force depends on the deceleration as it hits which depends on... 

Did ASTM A167 cover 304SS material? 
This note from ASTM should help clear this up. JohnNote 1; &... 

area of contact of a pipe laying on a flat metal 
The value of B in the formula is the WIDTH of contact per unit le... 

area of contact of a pipe laying on a flat metal 
If your plinth is flat you do not need to know its dimensions as ... 

area of contact of a pipe laying on a flat metal 
You're welcome. Make sure you keep the units straight;I am ... 

area of contact of a pipe laying on a flat metal 
Is this a homework problem or are you an engineer? If you a... 

area of contact of a pipe laying on a flat metal 
Yes, you need a weight to detrmine contact arae; if you know the ... 

area of contact of a pipe laying on a flat metal 
What material is the pipe and the sheet metal? Is it just sittiin... 

Deflection of a cylinder 
This is a contact stress problem that is complex, formula is too ... 



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