Understanding Young's Modulus

[@MFDOOMgr]

i have a question. I understand everything about Young's Modulus but, when they say a material has for example 210000 N/mm^2 , what do they mean? that it can handle 210000N/mm^2 in the elastic region? and then it goes to the plastic?

[@TheEfficientEngineer]

Young's modulus, yield strength (the stress at which a material goes plastic) and ultimate strength (the stress at which a material fractures) all have the same units. So it doesn't make sense to say "a material has 210000 N/mm^2", without specifying which parameter we are talking about. 210 GPa is a typical Young's modulus value for steel, so it is likely that in this case the 210000 N/mm^2 is Young's modulus.

[@MFDOOMgr]

@@TheEfficientEngineer and practically this means? that this kind of material can take up to 210000 N / mm^2 and then breaks?

[@TheEfficientEngineer]

No - it means that the slope of this material's stress-strain curve in the elastic region is equal to 210000 N/mm^2. So for example for an applied stress of 210 MPa, we would get a strain of 0.1%.

[@whitelight32]

@@TheEfficientEngineer Doesn't that also mean that we need 2.1 MN of force to change the materials area by 1 mm^2 ?

[@gieaudio8762]

@@whitelight32 no, it means that you need 210 GPa stress in material to deform it by 100%, of course it will fail because Young modulus is only appropriate (linear) in elastic range of the material. Simply saying, Young modulus is the number that helps you transform stresses to strains and vice versa but only in the elastic range of the material, for concrete it is 0,20% for compression, for reinforcing steel it is up to ~0.24% in tension

[@ajeynager8452]

I get amazed at the wealth of information available to us now. It's fascinating how physics, one of the broadest subjects, is so widely accessible and easier to understand if explained by independent creators rather than by mainstream school teachers. Amazing video, btw!

[@maazshariff9309]

Pls don't put music in the background. It is distracting 😭

[@UsualYaddaYadda]

Yeah, almost unlistenable

[@abuabdullaahiwaaaishatah8235]

Yeah

[@MetalSquarepipe]

Fr

[@tanuthakur4161]

It feels sad that you have very less subscribers. But I must say the way you explain concepts is awesomeeeee..... Looking for many more concepts from you ....

[@sirigiri7091]

Ya your right , sir your videos are really good , l like them a lot , we can understand easily and gain good practical knowledge .

[@abdirahmanabdulbari6665]

Hello by now you must have graduated

[@mozammelmia3714]

Awesome. I am a doctoral student, and found your videos amazing. Super easy to understand, but extremely effective. Many thanks.

[@havenjoseph3728]

just started A-level physics and im so happy I came across this because no one else explains it so well. thankyou

[@lazytommy0]

I feel ya dude. Its tough finding the right information presented in the proper way sometimes. Thats why alot of people struggle with math. Its overly complicated by improper presentation.

[@souravkundu6874]

It's been 2 years. How did your A level physics end up??

[@tempestandacomputer6951]

Is this meaning introductory physics in your country, or advanced?

[@seungseungminji]

@@tempestandacomputer6951 It's for the A-levels, so junior and seniors (16-18 year olds).

[@AhmedKhan-mt7ky]

Bro the background music in disturbing the concentration. Please upload it with a smooth and lighter music like in your stress strain demonstration video. Thanks

[@vivekrajani7092]

This is a clear and comprehensible explanation. The sounds in this video are sooo pleasing and captions are perfectly timed. It is evident that you have really put an effort into making everything great. Thank you :)

[@jongeiser7569]

This is a really great straight forward video. As a Metallurgist, this was a really good introduction. You explained it way better than my professors did. I don't wanna be that guy that tells you why your video is wrong. But around 5:30, you show that carbon replaces the iron atoms in your model. In reality, carbon goes in between the iron atoms in the interstitial space. This is hopefully a video that you could do in the future talking about until cells and Crystal structures. Keep up the good work!

[@TheEfficientEngineer]

Thank you for your kind comments Jon. You are of course correct about the interstitial nature of steel - my mistake. Hopefully the animation still illustrates the point without being too misleading. A video on unit cells would be really interesting - thanks for the idea!

[@a1mforthetop]

​@pyropulse As an engineer with quite some work experience i must say the following: The stuff with the atoms is nice and everything but it should have been left out of a beginners introduction video entirely. The only thing that has to stick in the head of an efficient engineer is that E is a material constant that represents the slope of sigma and epsilon and is different for different materials. It is also commonly used in combinations like EI and EA. For the advanced theoretical engineer the atom part is important of course ;)

[@nahfid2003]

@@a1mforthetop I don't think so, I am a high school student and I get way more intuition if I understand how things work at the atomic level and then use the non-descriptive formulae.

[@updatedotexe]

@@nahfid2003 I agree! Atomic-Level-Explanations in Mechanics are the best!

[@hridaysahoo3101]

interstitial space means?

[@MANJU1ANANTH]

Very useful and simple refresher. I had forgotten these stuff from my college days. I was doing some project with my driveway to eliminate lateral stress on a retaining wall thereby extending its life. I was stuck at a point. I could get the vertical stress figured out but horizontal is what mattered. This video refresher cleared everything and I am at completion of my project. Thank you for the educational videos.

[@hemrajmeena4673]

presented all aspects of youngs modulas with great clearity and graphics 👌👌👌

[@tomasenrique]

These series of videos NEVER GET OLD!! thanks!

[@rikhilnell2623]

MAN! People like you deserve more subscribers!! Keep up the good work👍

[@MrShaan1000]

Everything is great about this video, the explanation is top-notch supported by equally great animations and designs. This is the first video I am seeing on your channel. Looking forward to watching other videos and understanding my concepts better.

[@ryanpfannenstiel7517]

I wish I had these videos before solids and egineering experinentation courses. Incredibly well done. Ill be sure to lead other people your way when they are introduced to these concepts.

[@emanuelnolasco3745]

Really interesting video!!! It is really awesome how this topic can be so simple to explain in a video of less than 7 minute instead when you are at university class normally takes 1.5 hours

[@lazytommy0]

I googled what my vise grip tool was made of and ended up with a bachelor's in engineering lmao

[@elliotskunk]

inspiration comes in many foms!

[@zachydrogeo]

This channel is the yardstick for engineering education

[@jakegray6987]

Thank you so much bro I got an engineering final today this helped quite a bit as well as several of your other videos. You have for sure earned yourself a subscriber.

[@TheEfficientEngineer]

Awesome, good luck! :)

[@kvsalahuddin5]

Channel is under rated ...i expected millions of subscribers ❤

[@ashishrai2098]

the kind of youtube channel i was searching. thanks it has helped me in my physics course👍👍👍 u r the best

[@appleitree]

Amazing explanation, that significance you mentioned is all the reason why this video deserves a like.

[@GeniusEngineering]

Keep up the good work of explaining these material properties in such an interesting and understandable way.

[@ARBB1]

Fantastic gem of a channel here.

[@zahidarafeeq4827]

😭😭😭😭😭😭😭😭 TY..TYSM! U r an ultra pro legend! God bless u! Why don't u tutor our teachers as well..I don't get a single word in his lecture! I feel blessed to have u as my tutor...TYSM!

[@karthick86c]

Thanks for the beautiful videos. Subscribed. But please consider not having the background music . It is quite distracting for a serious subject.

[@paulcarroll5602]

Just found your page tonight I find it interesting so far. I’m a dual ticket Red Seal Ironworker and Welder and I’ve performed tensile tests both in school and at work. What you covered is very informative but you could have added more about quenching and tempering and how much tensile strength it can add. How it increases brittleness and ductility. I had a weld test on mild steel with 7018 SMAW welding electrode(rated for 70000 psi per square inch) heated red hot and quenched immediately. It sheared at 138,000 psi on the tensile test which I found very interesting.

[@paulcarroll5602]

I meant lowered ductility, sorry it’s 1am

[@muhammadhaseebmujtaba5960]

Amazingly beautiful way of elaboration.my whole study of Youngs Modulus at one side and this at other side. Really great work👌. Keep it up

[@youngkim5909]

Correction if I may. 5:37 depicts the Fe atoms being replaced by Carbon, that's what happens in substitutional alloys. Steel is a interstitial alloy, the carbon atoms to not replace Fe atoms, instead they reside in the space between the Fe atoms. This is VERY important since the formation of martensite depends on the position of those C atoms to change the crystal structure of steel into BCT(body centered tetragonal)

[@Praveenstein]

Great, but i guess he wanted to keep the atomic level details minimum...so the beginners don't get confused, but the overall idea is correct

[@shripadnarale2150]

Plzz upload such videos more in the future so we will build our cocepts in better and efficient way. Thanx.

[@NILESHGCEK]

Now I will not forget anything about youngs modulus 👏👏

[@ngqobilezikhali6871]

Thank you for the wholesome technical explanation ,it makes comprehension easier in Mechanical Engineering studies

[@nesmaeysa364]

very informative with simplicity

[@eriktempelman2097]

Good video that I can recommend to my students. But be careful: in your stress-strain curve, you have greatly overestimated the elastic strain (it's just 0.1-0.5% for most steels) as compared to the plastic strains. Also, while many engineering materials indeed follow Hooke's law, this is by no means generic behaviour. Many plastics, foams, and biological matter are very different :-)

[@loadstone5149]

Thanks for the fact checking =)

[@dimchohvarchilkov683]

A short & comprehensive video which well explains the basics. Thanks!

[@jawadnoor2298]

I have Materials test tmrw thanks for the help

[@manojnagsharma888]

It is soo detailed!! Thank you upload more civil engineering related videos..

[@user-gv1zo4tf2v]

Very good explanation of material properties, hope we can see more video like this. thanks a lot~~

[@feynstein1004]

Great video. Wish it were a bit longer. I especially wanted to see a comparison of various materials, including graphene, which has the highest Young's modulus as far as we know.

[@TheEfficientEngineer]

Thanks Feynstein! Graphene would have been a good one to discuss. I'll try and mention it in a future video.

[@feynstein1004]

@The Efficient Engineer You're quite welcome. It seems like I'm an earlycomer to your channel, meaning I'll probably get to talk to you one and one and my feedback will actually matter. Just the way I like it :)

[@safdarali3829]

I am from India your video is very efficient for me thanx a lot

[@washingtonalmeida75]

Wow, you sound more cheerful on this video! :-D As usual, great lessons...Thank you.

[@superpilun]

Love the videos so far, excited to see where this goes.

[@JP_916]

hey, continue the videos. it helps me a lot. thank you!!!

[@salimkhoso7995]

The best presentation ever made Thanks

[@user-rk8lm3nk9u]

5:57 If i understand correctly... In bending load. It is strain that increases stress which results failure of material.

[@boumezanouar]

i just discovered you awesome channel ! i cant find the shear/bulk modulus thank you !

[@adelesmith7827]

Thank you!!! Glad I found your channel, I have a design principle module at uni

[@lucascrupi5637]

Amazing content keep it up. love the effort to quality in the videos

[@richie50]

Your videos are great. They help me so much. You should feel really proud of all the value u provide for people, at no cost to them!

[@rumeenchowdhury6976]

Every topic is very well explained and helps us visualise, which is really important. Hats off to @The Efficient Engineer. But it would be very much appreciated if music is not used.

[@FacultyDZ]

Thank you for your job , and I'm wondering If I could take some images from this video to put it in my thesis , if you don't mind cane you send me the resources to put it in the reference Thank you again

[@TheEfficientEngineer]

Probably best if you send me an email to [e-mail] with specifics.

[@Eric-sq4hd]

watching these to study for the MCAT. You should make "Efficient Doctor" videos haha

[@thecultofdeadcow]

You will become engineer of human body don't worry. 😁👍

[@CrankyRayy]

theres no need for the sad music bro im trying to learn here im gonna cry

[@pankajpandya5438]

At around 2:30, i hear wood and composites as an isotropic material. I somehow remember them to be orthotropic. Correct me if i am wrong. Nice videos: this one and others on this channel. I sometime stream them on TV as well. Thanks for putting such info in concise form. :)

[@baqirhussein1109]

Thx man, i have exam tomorrow, you helped me a lot ❤

[@Shreyas_Sawant]

Fantastic explanation! Waiting to watch more videos on Civil Engineering!!

[@onkarchavan7253]

Great going hope to have more vedio s in future

[@Vipul.Canada]

wonderful presentation

[@davidsvarrer8942]

Thanks a lot, for your very very good explanation of Youngs Modulus!

[@rachelkimemia5897]

Your slides are so good. The background, presentation,.....😃

[@isiTsotsi]

Fantastic explanation. Short and on point!

[@sriharshamukuri1598]

Great explanation in each and every video .feeling very happy to listern every video...expecting even more videos like this ..

[@craxd1]

The rule of thumb that we used, for a safety factor, was 1/2 the yield stress. Though the value can be moved, we used this rule of thumb for almost every application.

[@TheMightyThim]

Beautiful video, straight to the point and easy to understand. Subbed :)

[@bantothakur608]

So good an explanation it was..... believe me your subscribers are gonna increase with the speed same as the speed of light......good luck.... and I'm a subscriber too......=)

[@JC_Deutscher]

excellent!! very illustrative and to the point. Thanks

[@guitarman77084]

keep up the great work. Looks like you're channel is very new but your presentation and video making skills are already on par or better than quite a lot of educational content here on KZbin. I'm going to pass this on to my material science professors as they would be great for freshman engineering students.

[@TheEfficientEngineer]

Thank you, much appreciated!

[@mr.civilengineer6428]

Please post more videos. Thank you for easily explanation

[@Joules120]

You're a damn hero!

[@allancng]

Excellent. Greatings from Colombia!

[@chaitanyadeshmukh8341]

excellent work

[@ymdh123]

very useful videos, help a lot! Thanks!

[@rachitmalya9521]

Very well explained sir. Thank you.

[@MJay3060]

We can understand elastic as a temporary state, undone when the load is gone While plastic is a permanent state, a mark left after the load is gone

[@pacifictimes-p2f]

Very precise and informative

[@gholamalialmasi8906]

Thank you for your information and knowledge to us

[@St-jh8pk]

Thank you, so helpful and clear!

[@BackyardBirdsofAustralia]

These videos are great, thank you!!

[@evilferris]

Spacetime has a Young’s Modulus. Wish I knew more than that.

[@mountainbiker9330]

Thanks for this.

[@ekisseka]

Interesting fact; It's going to be on my exam.

[@xxDeadlyMohawkx]

This channel is amazing. Keep making videos!!!!

[@hakandede8588]

Amazing videos, helped me a lot. Keep doing these stuff :)

[@manuboker1]

Wonderful Lectures ! Thanks.

[@snoopdogofscience6873]

Great video, I think it would be good to add that bridge should be stiff but not brittle, because it certainly will bend to some extent

[@bkraj26]

Great Sir!!! Kudos!!! Please post more videos

[@mishalconnect2996]

Awesome explanation. Thanks

[@ivannikolov7126]

Let's summarize it - the physical meaning of Youngs module is that it represents the normal stress needed to deform the object twice its length by uniaxial loading

[@0086santosh]

Very informative!! Please create a video on iron carbon diagram And heat treatment Thanks

[@hridaysahoo3101]

Sir my doubt really got cleared. Thank you, sir. Sir, it would be better if you decrease the background music just a bit. yours faithfully Hriday Sahoo, India

[@salmankhanmohmand9174]

Great aninations and best teaching method....but the number of lectures are not enough to fulfill our courses..Hope that it get benifits to students in near future🥰

[@yaseenwazir5844]

Great job

[@asmaaabdulhamid2292]

it was so helpful, thanks alote

[@DC-wi9gm]

extremely helpful

[@hruthvik]

inter atomic animation with springs 👌

[@mzakariya6574]

I learned alot here. Thanks man!

[@bolloberry9486]

can you do a video about shear modulus? and how the elasticity of an object is related to it? also tysm for this video

[@nimadabiri]

Awesome video! The explanation was brief and right into the point. Thanks a lot!! I was wondering what sort of software you use to make your videos. The transitions are smooth, and the figures and graphs are animated.

[@TheEfficientEngineer]

Thanks a lot Nima. I use Blender to make the animations.

[@srinunaikbanavat8077]

Well explained Sir.

[@abinashsahu6445]

appreciate video ,nice .if it play slowly then more easier to understand.