Recent content by a5hl3yi

Question: How do I use this formula to find the Radius of curvature? Formula: M/I= σ/Y = E/R (M = bending moment, I = second moment of aria, σ = stress, y = distance from nutral axia, E = modulus of elasticity & R = radius of curvature) Attempt: In this question, I have all of the...

thanx. So does that mean I would work out (100mm x 100mm) - (70mm x 70mm) and us that as the aria in the formula or work out the Moment of aria for the 100mm x 100mm and take off the moment of aria for a 70mmx70mm square?

Great thanks the both of you, I think I understand it now :D Just wondering, is there a textbook or something along those lines that ether of you would recommend that covers this kind of physics? I spent £35 on one that a tutor recomended and its not very good at all :) Thanx (also I am...

Question: How do you work out the second moment of aria for a hollow square beam? Attempt: I have looked over my notes and it says how to get the second moment of aria for all beams but a hollow square one. It has I beam, Circulare beams, Rectangular... How do you go about working it...

Question: A beam is givn with an axial strain of 500x10^-6 and a Young's modulus of 200GNm^-2. work out the magnitude of the tenslie load. Rlelvnt equations: σ = YM x Axial strain My workng: So far I have worked out the stress of the beam to be: 36000000Nm^2 36MNm^2 But from...

Right. thanx. So this is what I have now: (400x10^-5) x (180x10^9) = 720000000N/m^2 Now this is correct I hope, how do I go about workng out the magnitude of the tenslile load? (dont really want to keep asking loads of questions, sounds like I'm just leaching but I'm soo stuck :S)

Ok, so I'v worked out the stress in the beam : Stress = Young's modulus x Axial strain Stress = 400x10^-5 x 180 Stress = 0.004 x 180 = 0.72 (dont know what units to put it in though :S) Now I have to work out the tensile load that is applyed. Is there a formula for doing this, because...

Thanx, don't know what I was going on about then. The more I go into it, the more it all seems the same to me. Ill use this n put what i get on

First of all, thnx, and in my question the strain measured by the gauge is an axial strain. Secondly. Soo I need to work out the strain first. Ok. This is a formula that that I found on a different thread asking a similar queston: σ = Eε (Strain = Young's modulus x Axial strain)? Is this the...

Question: A bar has a unknown tensil load. A gauge shows that the strain is 400x10^-5. Work out the Stress & Tensile Load (there should be an image attached of the beam. Also the Youngs modulus is given as 180GNm^-2, but I believe this is for a later part of the question) Relevant...

yea thanx. Ill use this to give it a go. Ill let u know if I crack it and mabe post what I get as my answer up. Hopefuly tho ill of done it correct :D At least I know what it is now, never done anythin like this one befor. Thnx for the help.

I have drawn a beam that I have made up that has two supports on it but only one is in contact with the beam. how would I go about drawing a BM diagram for this beam? The BM diagram has to show the values at (from left to right) the first support, the first dotted line, the second support and...