Recent content by Saints-94
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Tube Bending Stress: Hand Calcs vs FEA Analysis
Thanks. I have put these into the formula and have got.. Moment of inertia; I=(π×D^4)/64 I=π/64×(〖0.0253〗^4-〖0.0213〗^4) I=1.000797×〖10〗^8 m^4 W; W=F2/2 W=268.05/2 W=134.03N Deflection; y=(Wc^2)/3EI(c+l) y=(134.03×〖0.58〗^2)/(3×(7.03×〖10〗^10)×(1.000797×〖10〗^8))(0.58+0.36) y=0.0201 Note...- Saints-94
- Post #21
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
Thanks for your help. I was wondering if you could help me work out deflection at P2?- Saints-94
- Post #19
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
Thanks again for your help. I have realized that I needed to half both forces as the lever is made up of two 'beams'. This then gives me a moment of; M1(0) = + 96.35*(0) - 191.39 = -191.39 (N*m) M1(0.36) = + 96.35*(0.36) - 191.39 = -156.46 (N*m) Which gives me a stress of 1.978E+08. This...- Saints-94
- Post #17
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
There is a hook on the lever at point A, which is to attach to a bar. The lever can pivot on this point around the bar. Therefore this has been treated as a hinge.- Saints-94
- Post #15
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
The two forces have been found through research. The lever is on a hinge at the left, P2 is a human downward pull force, and P1 is where an object is being compressed. The moment I have used in the stress calculation is M1(0.36), as this is where I believe the stress will be acting(?) So for...- Saints-94
- Post #13
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
I was expecting them to be closer, that's why I was concerned I had calculated it wrong. Yes, it allows it to rotate- Saints-94
- Post #10
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
Thanks for all your responses. Apologises, I got my units mixed up! It should read mm, not m. The lever is a fixed hinge on the left hand side. My bending moment has be re-calculated as.. M(x1) = + RA*(x1) - MA M1(0) = + 192.65*(0) - 382.70 = -382.70 (N*m) M1(0.36) = + 192.65*(0.36) -...- Saints-94
- Post #8
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
Thanks for that, my mistake! However my calculations are still coming out at 3.955E+11, as opposed to the 2.1E+8. Seems like they are still quite a bit different, any ideas why this could be?- Saints-94
- Post #3
- Forum: Mechanical Engineering
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Tube Bending Stress: Hand Calcs vs FEA Analysis
I have ran an FEA simulation on a lever to work out the stress on the part. I have now started doing some hand calculations to validate the software results and am struggling to get the values to match up. I am unsure whether my calculations are wrong, or whether the software is incorrect. The...- Saints-94
- Thread
- Bending Bending moment diagram Bending stress Stress Stress analysis Tube
- Replies: 21
- Forum: Mechanical Engineering
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FEA Hand Calculation Validation
I have ran an FEA analysis on part screenshot below. I wanted to do some hand calculations to validate the results. What formula should I use to calculate the stress?- Saints-94
- Thread
- Calculation Fea hand Solidworks Stress
- Replies: 2
- Forum: Mechanical Engineering
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MATLAB Working out an equation on MATLAB using co-ordinates
That's great, thanks for your help! Is there anyway to show the equation for the 'fit' line?- Saints-94
- Post #7
- Forum: MATLAB, Maple, Mathematica, LaTeX
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Calculate Max Lever Length for Toppling Block
No, this is additional work I wanted to include but needed some guidance on what formula to use. No worries if you can't assist, its not essential work.- Saints-94
- Post #9
- Forum: Introductory Physics Homework Help
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Calculate Max Lever Length for Toppling Block
The CoG of the block is in the centre of the block, and I assume the block will topple at the bottom right point? I am unsure what formula to use to work out the equilibrium and toppling?- Saints-94
- Post #7
- Forum: Introductory Physics Homework Help
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Calculate Max Lever Length for Toppling Block
Yes, it is for a project.- Saints-94
- Post #5
- Forum: Introductory Physics Homework Help
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Calculate Max Lever Length for Toppling Block
Thanks for your response. Yes. Sorry, the height of the block is 1100mm.- Saints-94
- Post #3
- Forum: Introductory Physics Homework Help