Shear and Moment Functions Example 1 - Mechanics of Materials

[@kushlar]

This guy is a life saver; about a year or so ago, his series on mechanics of materials was the reason why I passed my course and now, a year later, I've gotten top marks in advanced Aerospace Structures and heading into structures specialisation. This dude is the best!

[@topviddaily]

So far the only video I've found in days that taught this method. Exactly what I was looking for thank you so much

[@donaldsmith3655]

@structurefree +structurefree At the end of your STATICS work for cut 1 you got your signs backward. In your bending moment equation it reads: M1= -2.131x1 + x1^2. It should be reversed: M1 = +2.13x1 - x1^2. Your work is correct up to that point. You just goofed on the arithmetic there. Love your videos. I watch all of the relevant clips after lectures. These make my deformable bodies class easy, and reinforce the material very well. Thank you and keep it up.

[@iliof1]

Thank you for the video... You make it sound so easier and solve it as it's a puzzle. It helped me a lot and you deserve a cookie.

[@structurefree]

Here's an example demonstrating how to calculate shear and moment functions for a beam.

[@structurefree]

Ben O'Neill i use an older lenovo tablet x220, but I just got a microsoft surfshizzle profizzle trey ....somebody is about to go cray.

[@carsonhenderson]

i kept messing up where you did cut 3 on my own, i thought you could draw x going right to left from the rightmost side when you made the cut, it threw all my calculations off and i’ve been wracking my brain all day! THANKS BRO

[@andavenport2]

structcha FREEE!! LEARNIN'!! You're the best, man. 10/10

[@structurefree]

+adam west Awww Djyeah!

[@Necrodoxious]

These videos are absolutely invaluable, thanks so much!

[@jennyin6802]

This is awesome! I have my final tomorrow and needed an example like this!

[@TheAzn4evah]

Love your voice and the way you teach lol. Thank you for (hopefully) saving my @$$ in my class man, never stop making vids!!!

[@andresugianto]

at 6.58, isnt the moment should be M1 = 2.83(x1) - 1(x1)^2? instead of M1 = -2.83(x1)+1(x1)^2)?

[@nicolef4552]

yes i think so

[@kurrireich1567]

You're awesome, please please please, don't stop what you're doing! You kill it! Luv u B!

[@Andrei_Calazans]

i rarelly comment but you deserve my comment, your videos are awesome! thanks.

[@okaypam]

Sorry but if cut 1 (0

[@JohnCena-lt1el]

did you ever find out? am curious too official john cena alert

[@mohammedalameri4763]

I noticed that my problem was with defining the number of cuts and a correct coordinates and being consistent. Thank you very much for the fantastic explanation. if you have time, I would like to see an example about Castigliano Them and the use of the fake moments and loads to determine the deflections. Thanks again

[@mustafahussein568]

You have a mistake in the minute 6:57 at the [ moment 1]

[@kevinflorian01]

Are the signs correct for M_1 when you isolated it when summing the moments?

[@xTheBigKezz]

Thanks. This was a great video ✅

[@eneabaumann7296]

awesome explanation! couldn't be better! THANKS

[@structurefree]

+Enea Baumann thank you!

[@iilillilili43]

finally got where does that sign came from. thank you!

[@roberthunt8636]

Awesome example

[@RobertoEmilioRomero]

Isnt Ay=2.83KN?

[@structurefree]

RobertoEmilioRomero Yes, I didn't write my notes very clearly. sigh..just replace all the 2.13's with 2.83's. I've added some annotations to the video.

[@sobameeoishi9279]

thank you very much, your video help me a lot in my study

[@TheKhaled708090]

Can you make a video about matrix stiffness method for calculating indeterminate structures

[@emmaaudu3461]

Please can you do an example of that of a fix end beam on the left?

[@michaelwagoner6176]

You're a god damned hero!

[@Rjoukh]

I am solving a deflection problem, and the beam has a moment in the middle, how do I include the moment in the total moment step function ?

[@naseem5607]

excellent work

[@muhammadzohaib8146]

What software did you use for electronic writing?

[@weenabuscompany5960]

Hello.. May I know why the Moment at Cut 3 goes "clockwise" and the shear goes up..? Thnx

[@perfectlogan1003]

the shear goes up maybe because of the support at B... abt the moment, idk lol

[@nicolef4552]

that's just the positive notation that's widely accepted and used for internal moments. They always go "up", so on the right side of a cut, it is clockwise. Same for shear, on the right side it is always up, on the left side it is always down.

[@AzeraKotaro]

Thank you for the lesson!!!

[@MrShrooofe]

I think you have mistake in Ay .. its 2.83 but you put it as 2.13

[@shannonwinsor2177]

@ 8:21 where did the 16 kN/m come from?

[@nicolef4552]

when he multiplied out the 8(x2-2) he got 8x2 - 16

[@fuadbusiness947]

he distributed 8 over (x2-2m), 8 times 2 is 16kn/m

[@marcgrondier398]

hey man, could you explain why x3 was taken this way? I'm not very good at this so I would have taken it coming from the right for 0 < x3 < 3 or from the left for 6 < x3 < 9. i'm really lost about this point

[@muhammadalishah6899]

why did you write shear forces as negative in first and second cut? during sum of forces..

[@structurefree]

Probably because of global equilibrium.

[@aadyaadyaadyaa]

dude I love you

[@structurefree]

😍

[@omarbeseso8164]

in cut 3 why the By=10.1 isnt inculded? while in cut 1 the 2.13 force was included ? i would be thankfull if anybody make it clear to me ^^

[@kingbisanka9689]

The By=10.1 is not included because he considered the right side of the beam.. That is, his cut was after the By=10.1...

[@ebrahimcrazy4]

thank you sir

[@arieladael3733]

Where are the subtitles?

[@alirezakarimi4977]

Hi .Thanks a lot for ur nice video.I wish u were our teacher in statics. Actually I didn't understand the last cut part.Could u please explain it for me that what happened there??

[@ourhub9388]

if you could be precise i might be able to answer

[@nigelsalick6147]

Can you do this question please

[@jacqueswillemse2465]

9:47

[@mustafahussein568]

and the same at 8:34

[@sutanupsantra]

i think force at A is 2.83, i guess you wrote it as 2.13 by mistake

[@fuadbusiness947]

why are you in a hurry, slow down