Here is a sample exercise related to my final exam.
A screwM8x8 with completely threaded stem,class8.8zinc coated,must close 3 flanges,with transverse size much greater than that of the screw,made of a light alloy(E=80x10³MPa),of thickness 15,25,30mm.surface roughness is Ra=1.6um .Friction coefficient between all the surfaces in contact is comprised in the interval[0.12,0.16]and clamping is through a torque wrench(I=1.6).In operation the connection is subjected to a variable load between2000N and 6000N opening the connection.
You are asked to:1,compute the admissible force during closure,by considering a preload stress equal to 90% of the yield strength of the material.
2,compute the torque required to obtain this preloade force.
3,make the necessary verifications(minimum preload,static verification,fatigue verification)
Any recommendation with which I can get everything clear in this matter?Thank you.
Where Can I Find Some Free Websites to Study Bolts and Nuts?
Re: where can I find some free websites to study bolts and nuts?
