Moment Area Method Example 4 (Part 2/2) - Structural Analysis

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structurefree

structurefree

Күн бұрын

Пікірлер: 55
@exilibus
@exilibus 2 жыл бұрын
9 years later and this is the only video I could find that explained this in an intuitive way. This will very likely save my grade on the final today
@f.tolgasavas9776
@f.tolgasavas9776 7 жыл бұрын
You are born to teach man. I'm studying my exams from your videos. I hope I can get a good point. And I think you should open a website and put your writings in PDF form. That would be so useful to people. :)
@structurefree
@structurefree 11 жыл бұрын
thank you for the comment and question...i'm also glad to hear the videos are saving the important parts of your body :). Technically, yes, d = L*sin(phi). However, when we calculate beam deflections in a structure (since deflections are so small relative to the size of the structure) we typically use a small angle approximation...sin(theta) ~ theta...which allows for d = L * phi.
@hudaal-mashta7920
@hudaal-mashta7920 6 жыл бұрын
I wish I knew you 5 years ago, this would have made my structures theory class much easier. I'm taking MSc entrance exam this month, and your videos are saving my every day! BIG LIKE, and BIG THANK YOU
@randalperfected5644
@randalperfected5644 9 жыл бұрын
i think im in love ❤ i stopped going to my solid mechanics lectures and started using your videos, right now i´m helping the guys in my course understand, and i say it´s your videos that make it so easy So A BIG THANK YOU from me 😊
@alexhamad9307
@alexhamad9307 10 жыл бұрын
You're the man! More examples would be awesome, thanks!
@pavstaaaa
@pavstaaaa 9 жыл бұрын
I agree! With numbers :)
@anubhutialok470
@anubhutialok470 11 жыл бұрын
Thankx a lot. Saved us using a lot of brains. Great help....
@structurefree
@structurefree 10 жыл бұрын
no problem. i hope you will still continue to use the brains you have. cheers.
@thoae236
@thoae236 9 ай бұрын
Thanks for the video. I also used singularity functions to find deflection at point C, which gave me -P(b^2)(a+b)/(3EI), which is different with the result here. Does anyone have the same issue?
@Ferson101
@Ferson101 11 жыл бұрын
I think I am ready to solve some problems now , Thanks !
@zjyub
@zjyub 4 жыл бұрын
I have a question and I see I am a little late to the game. But How do we know which directions to take our centroids from. It seems like in one example you go left to right and then other examples you go right to left. Things are starting to clear up for me.
@arrdeep
@arrdeep 10 жыл бұрын
Thanks man! Its very easy to understand.
@HHHPedigrees
@HHHPedigrees 7 жыл бұрын
If the two points that you're trying to find has both a postive and negative moment do you take the signs into account? Would the positive moment cancel out the negative moment?
@Blogdorf
@Blogdorf 10 жыл бұрын
Great presentation. I'm working back through Structural Analysis by McCormac (1960) to re-learn what we blasted through in engineering school. What software are you using to do the board work? That makes the presentation really cool.
@Mishu1434
@Mishu1434 11 жыл бұрын
If load p is in between the supports than what should be the approach? Imean i want to solve a problem by triangle proportion property.(may be in this problem this is not required)
@hikaru2521
@hikaru2521 8 жыл бұрын
thanks so much for all the helpful videos, you've certainly saved my grade a few time T.T ;D
@bhargavajith222
@bhargavajith222 8 жыл бұрын
will the angle at B be "delta C/b"??
@Kevin_Tembo
@Kevin_Tembo 9 жыл бұрын
Like how is d equal to and angle times length
@ammarkareem633
@ammarkareem633 9 жыл бұрын
please what is the rule to choose where the x bar should taken ....
@structurefree
@structurefree 9 жыл бұрын
Ammar Kareem I think it might help if you watch the explanation .... kzbin.info/www/bejne/aoiXaKWdiapjb68
@altaazghoor7364
@altaazghoor7364 4 жыл бұрын
Not sure if you'll reply to me xD but how do you know where to take your xbar from. Your xbar for tB/A was taken from B and your xbar for tC/A was taken from C, so i would assume the xbar value comes from the first letter in t to the centroid of the particular area?
@kavishdaya3594
@kavishdaya3594 3 жыл бұрын
hi lol have you figured it out by now, I'm curious to know as I'm not not sure as well
@teresarodriguez9902
@teresarodriguez9902 7 жыл бұрын
To find DeltaC we use the magnitude of Tc/a, if d was also negative would we also take its magnitude or leave the negative?
@teresarodriguez9902
@teresarodriguez9902 7 жыл бұрын
Answered my own question: Take the magnitude because we are using the distances (which are magnitudes) to find DeltaC.
@patrickwoolery6000
@patrickwoolery6000 6 жыл бұрын
Very helpful. But I also need to figure out the angle at B! Why the heck are you not my professor for this class?
@mdsamiullahchowdhury9191
@mdsamiullahchowdhury9191 9 жыл бұрын
thanks a lot. u are the boss
@onursaroglu1737
@onursaroglu1737 5 жыл бұрын
Thanx for everything i passed the mechanics of materials class thanks to you and your videoss Helllooo whatsapp welcomee backkk everyone
@lestervalmores829
@lestervalmores829 9 жыл бұрын
how to solve for the slope at C?
@bhargavajith222
@bhargavajith222 8 жыл бұрын
+Lester Valmores i guess it is equal to the slope at b and its "delta C/b"
@Kevin_Tembo
@Kevin_Tembo 9 жыл бұрын
Sorry to ask but I dont quite understand how the angle is found without using tan
@mohamedelgendy159
@mohamedelgendy159 8 жыл бұрын
Since the angle is very small, we assume that the angle and the tan of the angle are equal
@y.x.782
@y.x.782 8 жыл бұрын
Excellent instruction certainly. Just one thing I thought could make it slightly better, personal perspective. That is to keep the sign of tc/a, then the results would be able to tell if the defelection is up or down. But after all, thanks!
@vijay4560
@vijay4560 3 жыл бұрын
Not possible with the tc/a direction he assume.
@pattanapongkitnongsuang2141
@pattanapongkitnongsuang2141 10 жыл бұрын
why don't you just directly calculate Tc/b? (I'm not so good at geometry Thx a lot)
@structurefree
@structurefree 10 жыл бұрын
Pattanapong Kitnongsuang tc/b would be the vertical distance to c from the tangent line at b.
@SeckinTankisi
@SeckinTankisi 10 жыл бұрын
just wow
@structurefree
@structurefree 10 жыл бұрын
word.
@aarontao2353
@aarontao2353 6 жыл бұрын
thank you so much
@alvmal
@alvmal 11 жыл бұрын
Why can't we say tc = tc/b + tb... Which means tb is zero... Then solve for tc/b and get an answer of -(Pb^3)/(3EI) ? ... Big thanks for the videos, I've watched them all.
@jasonaricheta5330
@jasonaricheta5330 8 жыл бұрын
hrmm, I tried to draw tb/c in a diagram and it doesn't seem to work (it geometrically doesn't make sense). I can see that you used a vector notation in your algebra and it seems to not be able to work in this concept.
@joseemmanuelnavarro7210
@joseemmanuelnavarro7210 6 жыл бұрын
HAHAHA "Don't judge me judge yourselff" :D
@structurefree
@structurefree 11 жыл бұрын
the process is still the same.
@vijay4560
@vijay4560 3 жыл бұрын
Hi, I have one doubt
@mashudurathogwa4731
@mashudurathogwa4731 8 жыл бұрын
don't judge me judge yourself...haha.Thank you so much for the help
@maryamezz8848
@maryamezz8848 8 жыл бұрын
thaaaaank you...may allah bless u :)
@marcusbautista97
@marcusbautista97 9 жыл бұрын
Too siiccckkk!!!!
@structurefree
@structurefree 9 жыл бұрын
+Marcus Bautista i'm illin.
@slickskillsman
@slickskillsman 11 жыл бұрын
I think you made a mistake: You said Phi = Pba^2/6EI/a = Pba/6EI Is it not Pba^3/6EI ???
@structurefree
@structurefree 11 жыл бұрын
It probably would have helped you if I wrote the formula as phi = (1/a) * (tB/A) which makes phi = Pba/6EI. It's also a good idea to check units. phi should be in radians...[Pba] = Force * Length^2 and [EI] = Force * length^2. Thanks for your question. I hope my explanation is clear enough.
@icyburger
@icyburger 7 жыл бұрын
Structurefree, tell the truth. Are you the re-incarnation of Jesus. Becuase, you just fucking saved me.
@icwhatudont
@icwhatudont 11 жыл бұрын
im not a fan of using geometry and assuming we have a table of centroids. it's nice, but just using calculus seems more reliable.
@michaelflynn3433
@michaelflynn3433 10 жыл бұрын
He's demonstrating the Moment-Area method- it's in the title. The other method using double integration may have been easier, but that's not the point.
@albatus187
@albatus187 5 жыл бұрын
Basit ya
@lyka37ful
@lyka37ful 8 жыл бұрын
structurefree i love you please marry me
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