its way beyond any compliment ..the way u teach sir...my life will be meaningful if i get a chance to learn civil engg 4m u....thanks sir ..

Sr. Great material I have follow you for a while and from time to time return to your videos. I'm wondering if you have one to explain pressure vessel head design consideration. Flat head type design vs. Hemispherical head and stress calculation comparison between both.

Thank you for videos. They are really useful for engineering students

All of your videos are infinitely awesome!

I'm a 4th year engineer graduating in december, I still find your videos extremely useful, I wish my professors were as organized as you.

On a good-bad scale, that's bad. I love this guy! Great instructor and makes it easy to understand.

@philg24 Good luck with the exam. I'm glad the videos are helping. Thx much for spreading the word! RMF

you sir are amazing! thank you for every single video :)

Wonderful, you're most welcome - RMF

@TheEL3M3NT

4 жыл бұрын

Why do you use the formula for hoop stress to layout a pressure vessel rather than the von Mises stress? Thank you.

this video helped me out so much, thanks!!!

Thanks mate, it seems that you (if you're not already) would make for a wonderful teacher/professor.

Great video, very easy to follow. I am currently using these to help prepare for final exams!! :D

@amrhass Very good. I'm glad the videos are useful to you - RMF

Thank you for working in metric units!

very good class!!!

Thank you prof. its value thing..

thanks much you are helping me

thank you very much!

"Blowing up propane tanks that's BAD."

Great video! Thank you. Question though....how come you don't add up the Hoop and the Axial stresses using the principle os superposition to get the sum of the stresses. I mean think about it...if tube that has internal pressure and experiences hoop stress+ I add endcaps and now I have 1/2 hoop stress just 90 deg offset...that significant! Shouldn't there be a net stress in some 70deg or so!?

@n29bodyjump Thanks. I hope it helps with your classes.

thanks man you help alot😎

thanks much

Mr. French, if we have a hallow metal sphere, what forces act on the sphere if we sunken the sphere in the ocean, and at what depth we can sunk the sphere not to exceed yield stress. Thank you,

Great video! "Blowing up propane tanks..that's bad!" haha!

What is the suitable safety factor for Pressure Air Vassel with working pressure at 10 bar at normal temp from -10 to 50 Celsius

Hi there! You're videos are amazing but i'm having problems understanding the last one. Shouldn't you use Trescas formula for calculating the pressure? Sigma 1 - Sigma 3 = yield stress? Cheers

Hello sir , I learned a lot from your videos , Can u help me in two points regarding thin wall vessel , Do we use the Yield stress or ultimate stress to design the same , I think yield and you mentioned in the Video yield but please confirm , also for the "dish ends" do I consider stress =pr/4t or stress =pr/t?

could you please put up videos for thick walled cylinders...thanks

what about making von misses to compare with sigma?? what safety factor would you use?

is there any video for thin wall spherical pressure vessel?

Also is it possible to briefly cover thick cylinder pressure vessels? Thanks a lot!

These exercises always performed with positive gauge pressures, but can be applied to negative pressures (vacuum)?

Shouldn't you calculate the trescas or von mises reference stress? Is that only relevant for thick walled or is it never relevant?

Why didn't you merge longititional and hoop stresses using Mohr's Circle rules to find principal stress?

@fatihbilgeylmaz3966

8 жыл бұрын

+Fatih Bilge Yılmaz Ok I did some research and it turns out. Longititional and hoop stresses are the principal stresses because there is no shear stress.

it's Stu from Hangover!

what would you do to apply a safety factor, say if i had to work out max pressure with a safety of 4 would i just multiply my end result by 4. thanks

@estoyzaclan5712

7 жыл бұрын

yes

@stefanbest7900

7 жыл бұрын

Estoyz Aclan one more question what formula would you use to work out pressure from a given strain

@estoyzaclan5712

7 жыл бұрын

I apologize I can't answer that question for now. Currently taking up Mechanics of Deformable Bodies and we're just on the Axial Strain lesson :)

im getting lost when your adding 10 to the power of 3 or 10 to the power of 6 into the equation, where do them numbers come into it ?

@estoyzaclan5712

7 жыл бұрын

power of three came from 101.3kPa as that's the equivalent of 1 atm. Converting that into Pa only you should multiply by 1000 or 10^3. Also, 10^6 came from MPa. Mega is 10^6. Hope it helped

For your last example. The mean diameter is not 0.02. It is (0.02-0.006)

@meshachkoech2979

7 жыл бұрын

no it is 0.2. remember 1m is 1000mm, his D is 200mm so 200/1000=0.2

prof.. why you didn't calculate the longitudinal stress?? for what reason??

@arindam120881

7 жыл бұрын

hoop stress is twice the longitudinal stress....so if you calculate hoop stress you are basically calculating the maximum stress on the vessel.....and we need the maximum stress!!!!

why didn't you calculate the pressure on the hemispherical caps

i don't understand prof. why you didn't use the mean diameter of d-t??

@estoyzaclan5712

7 жыл бұрын

on the second problem... 200mm is already the mean diameter (denoted by Dm)

what is y refer to ?

@jenyong9449

8 жыл бұрын

+mido sad Yield stress, the maximum stress that the material can handle

Dm is given here so we can directly take that.....if in case outside dia will be given then it will be Do - t........

Nobody notices that he makes a mistake in the calculation of the hoop stress, the result is 937 Mpa, and not 93.7Mpa according with the properties of the material (300Mpa).. That vessel will explode

@IlliniRob1

9 жыл бұрын

Umm no.

@mohammedalbahrani5109

9 жыл бұрын

Luis Arrieche He is correct, it is almost 93.726 MPa