Recent content by perky416

I am making modifications to my air rifle, this part in question is the fill valve. Since posting on engineers edge I machined the part with the labeled 2mm dimension to 4mm as that was the dimension on the original part. After testing it I was happy that it was safe to use and it has worked...

Hi, Sorry perhaps I didnt make it clear enough in my first post. Thats what I was trying to calculate the max amount of pressure before failure, before the material shears off at the point labelled "2mm thick".

Ok so if we used Shear stress = force/ area Shear stress = 31.4N / 0.00012566m^2 Shear stress = =249,880.63 Pa Should i factor in the strength of the material? For example wouldn't steel be able to handle more pressure than aluminium? (Ps i really really appreciate all your help, thank you)

When you say area do you mean the area where the stress will occur? If so would it be the circumference x thickness? 62.83mm x 2mm =125.66mm^2 or 0.00012566m^2 Or am i completely off the mark?

Ahh we are getting there... Pressure is force applied to the surface so to speak. Pressure = force / area. Which gives us... Force = pressure x area. Force = 100,000Pa x 0.000314m^2 Force = 31.4N

Yes 2cm diameter is correct. So using MSK... Pressure = 100,000 Pa Force = 100,000 N/m^2 Area = 0.0314 m^2 Where do I go from here?

Oh i see what you mean. The total area that the pressure is acting on including the upward area is 3.14cm^2. For the force cam i simply convert the pressure? For example 100 bar of pressure = 101.972 kgmf/cm^2.

Sorry not too sure what you mean. Please could you elaborate a little?

ok thank you

Hi, Sorry reading my post back I understand I wasn't clear, I don't mean where the arrows are I mean where I've done the black line and labeled it 2mm thick i.e. "the contact area between the 2 parts".

Hi, I understand the location, its pretty much where iv marked with a black line on the diagram, I just can't for the life of my figure out how to calculate the max force. Regards

Hi guys, The imagine the picture attached is a cross section of a cylinder. How would I work out the maximum amount of pressure this can be exposed to before the metal shears off at the location labelled "2mm thick"? Lets say the following material is used: T6 Aluminium Ultimate Tensile...

Because that's the pressure it currently runs at :s, its an already made pressure cyclinder on a product...all I am doing is trying to increase the capacity. I wasnt assigned it its a personal project. My experience is aerospace/electronics/manufacturing engineering/machining/mechanics. Im not...

Hi, I have no idea what tension load is, the first time I have ever dealt with designing threads. The cylinder is some sort of hardened steel, possibly a form of gun steel, although there is no way I can know for sure. The cylinder threads can easily take the pressure its the threads on the...

Hi guys, Here is my problem / task: I have a 232 bar pressure cylinder (not sue what material it is made from) with a brass fill valve at one end. I am trying to design a new shorter valve so that it takes up less space inside the cylinder, and thus increasing the capacity. How would I...