Radius of Gyration and Buckling.MP4

[@onyiboemmanuel6060]

Wow your videos Sir, is the last Bus stop. you are saving a lot of people from depression and giving up. Thanks a lot Professor.

[@purdueMET]

Thanks very much. I'm glad they help. If you like the videos, I'd be most obliged if you could let your friends know about them. My hobby these days is counting KZbin hits.

[@realats]

You explained radius of gyration in dynamics in the simplest way sir... Thank you...it helped me a lot

[@nageshhosale]

felt like time travelled back to my college.....you are a great teacher. your students be shining somewhere. how fortunate they are.. 🙏

[@lachsfilet1362]

Thank you. I watched a lot of videos about moment of gyration out there. 1:55 in this video was the moment where I finally began to understand...

[@adityamorey9251]

thanks alot.. good thing i can prepare sitting in my hostel .. no need to attend class for a class far better is here on youtube .. amazing.. ur videos actually make me wanna study..

[@dasklo-rr]

thank you so much for this video. you're the only person i've found on the internet who could relate radius of gyration to buckling!

[@realkanavdhawan]

I clicked to have a quick look into Radius of Gyration but the explanation is too good I completed whole lecture

[@purdueMET]

Thanks :-)

[@DytBaat]

4:12 isn’t that a case of local buckling?? I mean if I’m standing on a coin, then no matter how much weight I put on it will never buckle like that. So I don’t get the short column thing later in the video. I find it strange that the wall thickness is not included somehow? BR Peter

[@nizamieminov3648]

Now this is a really great explanation, Sir ! Thank you.

[@MuhammadRahatLatifTousif]

beautiful way of explanation. Thank you, sir.

[@najurinajuri]

What an useful video, It really helped me, thank you for uploading this kind of material

[@Twitter.345]

sir your way of teaching is so good .... it is very easy to understand .ty

[@muhammadaliraza699]

Thnx so much.... Your lecture is really appreciatable

[@d.w.96318]

Thank you so much sir, saved me so much time trying to figure it out on my own.

[@vachanl]

the concept was been explained really well,thanks a lot professor. i was looking for a explanation of the radius of gyration (dynamics). i leaving understanding both of SOM and Dynamics.

[@MisterBinx]

At 2:20 I'm like nope. I'm interested in the Dynamics definition so thanks for explaining it to me. Good illustration.

[@purdueMET]

@stevenismybro You're most welcome. I'm glad the video helped.

[@JandCanO]

I was looking for an intuitive sense of these things as I'm in both classes you showed at the beginning right now. Thanks for this! You seem like a great teacher.

[@pradgadagkar8557]

998

[@GenaEnSamIAm]

Agreed!!Sure has helped me allot with my mechanics course the last couple of months! Thank you so much!

[@purdueMET]

@fandennis I'm afraid not. The important thing about buckling is that the structure can fail even though the material is below yield stress. Imagine a long, thin metal rod like a piece of brass brazing rod. Say L=1000mm and D=2mm. It would be very easy to get it to buckle. The load would be very low - far below yield stess.

[@fvjisinferno207]

You are an one for this video chief love from chicago

[@Akhillll1]

thanks prof you make it so easier to understand thanks again

[@kamaulhowe9890]

Very good informative video! Keep up the good work.

[@1994ours]

Thanks a lot you helped me with my eng since assignment thanks again

[@prabhakarkumar-rw6ho]

Thank you so much for this explanation Sir.

[@alovesonnet]

thank you so much sir. You saved my grades

[@DavidSchmith7]

Excellent teaching skills, bravo!

[@anirudhsrinivas2012]

Thank you sir. That was very informative.

[@jidapa2969]

Thank you, this really help me.

[@SunilSundar]

Is there a way to predict the buckling of the compression side of a thin walled beam in pure bending or transverse loading? thanks

[@yoooges]

Wow, thanks.. =) solved a long time confusion

[@shreyasraghatate6667]

In dynamics can the radius of gyration ever be zero, if MOI exists and is non zero around an axis. For exa, if I assume the entire mass is located at the axis itself.

[@vhtthai295]

Thank you.! What's the Cc?

[@mathstutor1]

Excellent video. Thank you Professor.

[@brndoseck]

UGH. Why can't you be my structures professor? You make much more sense of this.

[@mohamedibnali561]

but i still have a confusion the radius of gyration is only for calculation , not have a [physical meaning

[@niklip007]

In strength of materials the radius of gyration is the resistance of a cross section to rotate over an axis

[@nellvincervantes3223]

If you draw the equivalent system for the section, the area will be concentrated at radius of gyration from axis of rotation of buckling just like in the dynamics where the mass is concentrated at radius of gyration from axis of rotation. The concentrated area become strip with same moment of inertia as original system. Imagine if you apply a load on this concentrated area, and when you apply the Double Integration Method for deformation of this column with concentrated strip area due to buckling, the deformation will become lower as you go farther from the axis of rotation or as you increase the radius of gyration. Maybe im wrong.

[@drunkdonutboy]

I did the same thing for a can crusher project and came up with a ridiculously large number too. Professor said it was not right because another team concluded that 200 lbf is the amount a coke can needs to be subjected to to be "squashed" and I still don't know how to reconcile the two results and why one is significantly larger than the other...

[@pottiteddy3330]

its very helpfull for students ,thank you for ur explanation

[@purdueMET]

@abcarin0O0 No problem. I hope it helps.

[@guitarczar15]

your videos are so awesome

[@aj0035]

What would be the radius of gyration of a hollow cylinder in Dynamics, I mean in the mass moment of Inertia.

[@fandennis]

Could we have just calculated the beam for buckling assuming "long" and at the end checked if Pcr/A was greater than Sigma(Y) to decide whether it would be long or short?

[@razzilfaraon]

Nice and easy way to understand thank you sir

[@stevenismybro]

Great explanation! Thanks for your help!

[@MySharma1234]

You are amazing :) Wow , Thanks!

[@tanveerbellary9196]

For rectangular columns what should consider for "d" value

[@mostlymessingabout]

What do you think of the new super skiny skyscrapers now in NYC with a ratio of over 24:1. Of course its a concrete steel composite but does the physics stand up to safety and swaying at the top?

[@nitinbansal543]

In case of design of concrete structures we use selenderness ratio to L/least dimension why not L/radius of gyration

[@assassfifain]

did u mean short coloumn crushing.. because i deel that the short coloumn most of the time ails by crushing

[@pradgadagkar8557]

Cannot see what is written on the board

[@rafalgrycner]

What equation would you use for the short column, like can you showed at the beginning? I'm puzzled about that trying to validate the FEM results.

[@pranjalcr7]

RAV you've to use rankines formula, it works for both short and long column. Eulor's formula works for shot column only.

[@lyemily9770]

I think the 2 should not be in the calculation of Cc. Could you please show your derivation process?

[@anbas1982]

please explain the concept of poissons ratio

[@funnybunnychannel6012]

Why are old videos always good

[@tanveerbellary9196]

Sir i have confusion about the "d" value....actually what is "d" indicates?. Is diameter or what?

[@TheArchicad]

Awesome!!!!!

[@vibz123rulez]

if it is a rectangle do you need to do Ixx and Iyy?

[@healthifymyfood3648]

you have to calculate both..the one which is less will be taken(as it will fail along that axis).if ixx is small it will fail(buckle) along the plane passing through xx .

[@vibz123rulez]

thank you!

[@nitishbharti2196]

thank you sir......are you on quaro?

[@Birds_view_1]

Thanks a lot.

[@Hisham23633]

great video

[@lakkojisantoshkumar2638]

sir you havent related the buckling to radius of gyration

[@MoHonda90]

it's (r) which was used to calc SR

[@adammau8504]

Some things just take as being true. If you take every formula from the code and try and find out where it came from it would do your head in. Its just an equation derived from 1st principles. It doesnt really have a meaning, just gives us a number that tells us somthing. Bit like second moment of area. It only is a number that can tells us where most of the cross sectional area is at some distance from the neutral axis. Its how we use those numbers that matters.

[@adammau8504]

Noah Clanton all im saying is that you should be able to derive the equation and know where it comes from but when it comes to actually meening somthing well....its just a way of puting somthing in terms of one number to describe somthing. Obviously not all are like this

[@lumo841]

Thank you so much!

[@abcarin0O0]

thanks prof.

[@Pexelsvideo]

what is k=1 can you plz explain

[@nellvincervantes3223]

Pin-pin support I guess

[@aglaycock1]

I believe you have mixed mm and meters in those equations

[@naeemurrahman8767]

love you,

[@Kal-El_000]

Neat

[@david54626]

Im sure many are interested are both. The more you can relate it to the better it stick anyways.

[@ak23ism]

purdueMET Why not simply use the ratio of column length and column width, then make the conclusion that it is a long column? (say if L/w >1 (or some known constant), then long, if L/w

[@aavidali63]

nice

[@amazingworld3771]

Thnxxcc

[@johnbarneswood]

I'm interest in dynamics, not mechanics :(

[@bibekyadav8153]

2024

[@gaypotter]

"we're interested in strengths and materials not dynamics".... geuss im on my own then..

[@rupeshkathayat7584]

nice