Mechanics of Materials: Lesson 49 - Max Shear and Principal Stress with Equation Method

[@edyerodriguez3485]

Watching this 3 hours before my final. Stripes gave me such a stress relief.

[@zEre326]

love the cat!! thank you so much for the videos, so helpful

[@twinplayerz]

This video couldn’t have come at a better time… much needed. Great lessons back to back to back and back. Please keep posting these video and for future courses if possible!!!

[@gabrielrios4256]

The GOAT of Mechanic of Materials🐐🐐🐐

[@shan9646]

goal

[@HPalardy]

Awwww kitty! Thanks for all of your videos!

[@tommysteakhouse8063]

watch out if u copy the equations from his board, he made the following mistakes: in the equation of THAUmax, the term under the root should be ((Sx-Sy)/2)^2 not ((Sx-Sy)^2)/2 , same mistake in the formula for priciple stesses S1 and S2, hope this helps :)

[@OwnieHaachipuka-yz1vf]

Having exams tomorrow and this has totally been helpful, thank you.👍

[@MAShahriar]

13:03 well a native speaker making this mistake knowingly or unknowingly I don't know but, he's absolutely a genius when it comes to teaching mechanics! ❤

[@zachel7962]

i noticed that but i think he's just joking

[@smwalighazi6439]

Sir, no doubt your way of teaching is far more better than my college teachers. But can you also plz describe what is meant by principal stress and max in plan shear stress

[@MuizMalaysia]

the way that i understand, max in plane shear stress is the value of maximum shear stress, and can be found at a certain angle, theta s, and principal stress is the is maximum and minimum value of sigma or normal stress and also can be found at a certain angle, theta p.

[@firstlegend5105]

The principal stress is the stress that you find in your stress element due to shear stress being zero. Maximum in plane shear stress is when your stress element your shear stress is maximum and because it is maximum, you need to have an equal proportion of normal stress on both your x and y direction

[@manuboker1]

Wonderful solids lessons!! really taking the time to explain the problems along with a good sense of humor :))

[@zhaudirdauitbay3400]

thank you so much! I have a midterm tomorrow, and your videos are the only thing saving me.😅

[@centriminal5933]

It's like when you remember war memories 2:07

[@ethanboba5262]

Thank you for posting these videos :) Please continue updating the playlist !

[@ralual]

23:10 Just to clarify for anyone who got confused like me, they should add up to 90 degrees if you take them both as positive (same as theta p should), not 45

[@akezhanbolat7765]

nah, he is talking about difference between angles P and S, so it is like 14.87-(-30.12)=45

[@aybaws]

For the equation in the lower left (TauMax equation), I think the dividing 2 also should be squared.

[@christopherlee6364]

should be like that for the Tmax and the formula to the right of it (min and max principal stresses)

[@aybaws]

@@christopherlee6364 I don't know. I took the exam, got an A, forgot all about it now.

[@christopherlee6364]

@@aybaws it’s just what the equation should be. Probably just a typo but makes a huge difference if the 2 at the bottom is not squared too

[@praisemkhululimoyo6041]

@@christopherlee6364 Thanks for spotting that for others

[@The_Red_Sky]

Indeed

[@pov_Two024]

great lecturer !!!! hats off !

[@FatSlowButter]

studying for an exam rn thank goodness you posted this recently

[@svongsa]

🐈

[@danielolawole5754]

Tell stripes I said hi 😸

[@tuqanahed821]

Thank you ❤❤❤❤❤❤

[@mad915]

الف رحمة على امك وابوك راقي

[@baderaqw]

Translation: 1000 mercies(blessings) on your parents. Amazing

[@RubixIronside]

the man the myth the legend

[@thomasschenk1831]

Thank you Jeff!

[@thomasschenk1831]

Like top 2 mvp of the moment for me.

[@Mocha-Chu]

I love the cat interruption ❤

[@amanuelgetenet401]

❤

[@Theguywithephonyname]

7:00 now that cleared things for me😂, always confused me whats the sign of a shear stress. I know that shear in counterclockwise is pos and shesr in clockwise is neg, but that face and direction made all the more sense in determining the sign.

[@AdityaKKannan]

Absolute legend

[@JesseTheG_]

I'm not a cat person but stripes seems like a distinguished gentleman

[@Ramy505]

thanks for your effort , but i have a question , in fatigue problem when designing a shaft with gears you know torque changes at the same point of gear , can i take this as a torque fluctuation to get the Ta & Tm ( alternating & mean torque )?? or consider always torque is constant ???also when can i consider Mm ( mean or average bending moment)for a rotating shaft(so bending moment at same point changes from + to - with same magnitude ) is not equal to zero or is it (Mm ) always zero???

[@alphonseniyonteze3932]

Thank you very much❤❤❤

[@AA-vy3js]

The GOAT 🐐

[@jhononillgalvez950]

I didn't understand how to know the direction of shear stresses in each phase.

[@emin5790]

first 3 min is just randomly fun

[@shan9646]

cute cat is impressive

[@AhmedAliSiddiqui-b6q]

Jeff why we are not taking txy is zero in principal stress equation?, because we know that in this equation shear stresses are zero

[@Upendra.Bhattarai]

Principal strains, maximum in-plane shear strains and their positions

[@It_is_Nerdspeak]

❤❤❤

[@alpozcvk6146]

LOL this guy is really fun

[@oussama_lb]

Thank you sm

[@HenryBriskin]

This is all thanks to a man named mohr

[@BiblemanZ]

I love stripes😂❤

[@Bepbopbup123]

Omggmore of stripess

[@CrOssXoVer3]

using the stress x' transformation equation I got 68 MPa, not 53 MPa. Is it just me?

[@mindfull-_-6438]

I'm like stripes I'm so stressed out 😂😂

[@sabihahsubari3414]

mantap doooo uncle... L U S M

[@muratcansenturk3284]

İMPARATOR

[@zachrosedahl2813]

Your allowed to bring your cat to the college ?