Understanding Shear Force and Bending Moment Diagrams
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- Опубліковано 28 тра 2024
- This video is an introduction to shear force and bending moment diagrams.
What are Shear Forces and Bending Moments?
Shear forces and bending moments are resultants which are used to conveniently represent the internal forces that develop within a beam when external loads are acting on it.
The internal forces that exist within the beam will depend on how the beam is loaded, and how it is supported. Beams are typically loaded by concentrated forces, distributed forces, and concentrated moments. Typical beam supports include pinned supports, roller supports, and fully fixed supports.
How Do We Draw the Shear Force and Bending Moment Diagrams?
Determining shear forces and bending moments along the length of a beam typically involves three steps:
- First we draw the free body diagram of our beam.
- Next we use the equilibrium equations to calculate the reaction forces and moments.
- Finally, we cut our beam at a single location and use the equilibrium equations to determine the shear force and bending moment at that location. We repeat this process for each location along the beam, and draw the result on our shear force and bending moment diagrams.
💻 Read the article version of this video here: efficientengineer.com/shear-f...
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The Efficient Engineer is a channel aimed at mechanical and civil engineers. The mission is to simplify engineering concepts, one video at a time!
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💻 You can read the article version of this video here - efficientengineer.com/shear-force-and-bending-moment-diagrams/
📑 I''ve created one-page PDF summary sheets for this video and several others - more information about the summary sheets here: efficientengineer.com/summary/.
❤Support the channel by becoming a Patreon here - patreon.com/efficientengineer
@ 6:50 shouldn’t Ra be -ve?
I want these sheets...how and where do I get them?
Are you going to make more interesting videos related with ME?
Thank you for saving my time when understanding these concepts.
@@viveki6872 yes it is negative ..thats why the answer is positive (i.e +12)
Is it just me or did this guy just summarize an entire semester of engineering statics in 16 minutes in a more effective way than any prof or text ever did?
@@chaz3345 wtf. In India it is only one part of semester (1/6chapters per subject)
was thinking the EXACT same thing!
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@@pathikshah3607 Yeah - there's a problem with rushing through the very most fundamental aspect of structures: I've worked with a number of engineers from the Indian subcontinent. Decent enough engineers, for sure, but tend to have a weak appreciation of load paths, equilibrium, internal forces, stiffness matrices etc.
I think you guys need to spend more time on the basics - not just 1/6 of a course - and understand them properly and let them bed in. In structural engineering, everything flows from those aspects........
Im an engineer myself. Never did any book or professors explained it easy as you do. Greetings from Amsterdam!!
Thanks Mo!
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Yup, got to know that SF and BM are internal forces
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What use does it have in aerospace engineering may i know
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If this was available in 2012…… life would be much easier
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Jejej..
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@@TheEfficientEngineer Excuse me, what is the name of the music?
@@sebastiangabrielgutierrezd6476 did you find what the music name was?
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It lacks interaction.
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@@kavipriyam3885 The very question itself.
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I feel like that's _true _*_enough..._* but it _depends..._
My four years of btech education ... can't even able to clarify this doubt... really thanks a lot to you sir
Mee too
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Koi nahi bhai bada bcchd sa topic he sala dukhi kar rakha he koi dhang se clear hi nahi karraha
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This helped me a lot, I just took my strength of materials course recently and had a hard time visualizing. Your awesome.
suffering with that course rnnnnn
I have my honours degree in civil engineering and have been working in roads and project management for the past 4 years, so needed a refresher course on structures and analysing moments, etc. In all my years of university and being out in the working world, I have never seen such high quality content! If only this video existed back when I was in Uni, structures and design would've been a lot easier to understand! Well done!
I absolutely love your ability to clearly show the complex and simple parts of physics. I'm only a high-school level physics student, but this has explanations that I can understand. Amazing work.
I cannot thank you enough for all the hard work that you have put into these videos. Bless you
After you have graduated you might find yourself 200 foot above the ground, or the sea if you on an oil rig, on an unstable structure, with heavy rain and swirling winds, having to do hand calculations for this sort of thing whilst hanging on to scaffolding for dear life. DO NOT get to rely on software doing it for you, if you do you will never leave the office.
Thanks for a great video. This the first one that I have seen and I subscribed right away.
What do you exactly mean by you will never get to leave office?
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Corey Woods I love him even more...😉. He is so worthy! I mean this amazin!
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This is one of the best videos I have ever watched as a civil engineering student. Thank you for this.
The concepts and steps are explained perfectly. Hours of lectures all summed up in 16 wonderful min. Covid learning, 2nd year civil, mostly all online this semester. You just made structural a whole lot easier and enjoyable. Thank you.
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Very Interactive way of explaining. Well done The Efficient Engineer.
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I leant this stuff 29 years ago. I wish it was explained this good back then. Comps were still dos & 123, but your vocal explanation was very clear. Enjoyed that.
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Been a few years since my strength of materials course, but I would have loved to have this video at the time. Beautiful graphics and very clear explanation! Nice work
from 10:25 and beyond i was honestly amazed by how all those variables were connected to each other. it made me feel again the joy of learning that I have been missing from school for a long time now. Turns out, learning can be fun lol
all engineering courses wherever in the world must have your videos by default
How can anyone just clear ur all doubts in just a couple of minutes untill U r geneious. Thank u sir for making me interested in this subject.
The aesthetically cogent animation in this video aids in visualizing the loading and stress distributions much more clearly, allowing us to spatially understand it better and feel whats happening. Please continue to upload more of such awesome videos. PS: Euler_Bernoulli Beam theory and Prandtl's function
it is great to have such videos. when you don't practise it on a daily basis, simple things as the shear and bending diagrams become tricky. i really enjoy remembering that the shear force is nothing more than the first derivative of the bending moment. and i totally have messed up in my mind the order of the positive direction convention. so...thanks, a lot!
Thanks to this guy, i passes statics and strength of materials. In our lectures, professor was explaining really bad. I got 65 % and passed. You saved my life
2 years of mechanical structures calculations at the university (mechanical engineering) already 15 years ago for now, I drew a lot of shear and moment diagrams to validate beams and I didn't truly understand that drawing the shear force and bending moment diagrams is just figuring out WHAT THESE INTERNAL FORCES are at each location along the beam until now, thank you for this great video and 3D animation ¡¡
This channel is amazing, it has helped me a lot in understanding fluid dynamics and statics/strength of materials during this semester. Greetings from an Italian mechanical engineering student.
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my prof literally tying to explain this video over 3 months, I j understood so much better in 15 mins. Really great examples and explanations, and making it seem as simple as it actually is
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I was so confused hell I will watch 5 unskipable ads if it had to show how grateful I am
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Very good video for remembering the basics, which is the key in my opinion for understanding strenght calculations. First time I understood what the bending moment actually means, that it is the result of the internal compression and tension forces that cause it. Thanks!
I can't strees enough the importants of visual learning. This helps me alot, in understanding static and the math behind. Specially now that I have a dyslexic handicap. So thanks to the Efficient Engineers team :-)
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Till date no teacher has been able to explain like an @efficientengineer...Salute to you
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one of the best in youtube
thanks budy
I'm literally crying because i finally understood these diagrams because of you. Thank you!
Amazing, after a lot of exercise, I finally understand the concept of how to interpret what the shear-moment diagram represents in reality.
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This is several hours of classroom coaching. I completed my engineering in 1988 and i am recapitulating. But i think for a beginner this could be too fast.
Thanks a lot.
As a beginner myself, it's a lot very quickly. But practice makes perfect.
sorry to bother, but can i get help with the BMD where 12*2 gave 24 i understood, but the next line drawn was to 18 which i didn't understand because should we not do 6*4 as the next step instead? any help will be much appreciated
@@mizgintusgul8089 its drawn to just before the 6kN (not very clearly in the animation), so the calculation becomes (12x4)-(15x2) wich is 18.
@@bas0704 oh, thank you so much, sorry does it matter which one has the minus sign, like will it also be right to do (-12×4) +(15×2)?
Clockwise moments are negative so the 15 is negative but the 12 is also clockwise so which will i choose as negative moment please?
@@mizgintusgul8089 if you set that as your reference point, and everything els in the calculation is also set to the same reference point it shouldn't be a problem
if i would have this information when i was a student , life could have been much easier.
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I'm an Aircraft Engineering student and I love aerodynamics and thermofluids but I've been having a hard time with statics, thanks a lot for this video, helps a lot.
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I have gone through so many expert Professors but never understood concept like this. Please come up with more Civil engineering concepts.
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I had similar beam on an exam. I couldn't draw the correct diagrams back then. Very good video.
The PhD holder professors could not make me understand these concepts in 4 years and you made it in 16 minutes!!
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What an incredible video and channel.
Here's another mechanical engineering student you are helping!!!
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Keep doing what you do. A lot of people need it.
How is it that unpaid video makers are such better teacher than paid professors? Thank you that video saved my life.
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Notifications ON!!
This is the best video on shear forces and bending moments on the internet!
the BEST video explaining about shear and bending moment!!!
Amazing representation. Hope your channel grows quickly. Subbed 😊
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This is one of the greatest explanations I've come through... Thanks alot.. really great content you covered...
This video the was the most helpful for understanding shear and bending which I had ever watched!
Really loved your explanation and visuals you have used. Thank you for such simple breakdown. I wish to know more about the concept of steel structure bending moment and non determinants beams.
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I love you ♥️
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Excellent, Come up with more content like this
Great video although I think you accidentally made a mistake. When you were calculating sum of the moments from point B you wrote Ra force as positive when its actually negative since its on the left side of the point B (cros section) and is tilted upwards (therefore it sags the beam)
Also at one point you did not follow the rule you set. You said that if shear force is on the left of cros section then tilt down is positive. But when you started to calculate those shear forces (which are all on the left side of the crossection) you switched. You calculated reaction forces which are tilted up as positive and applied forces as negative.
Yeah I was also abt to comment at it..
Another learner here, regarding your first topic, technically, positive or negative signs indicate direction and since he has those listed in the diagram shown during that subject he isn’t necessarily wrong.
I haven’t figured out what time you are referring to on your second question.
U guys don't know what this guy had explained..we are drawing nothing but internal shear force and internal bending moment diagram...and no one says that..the diagram sawn is exactly opposite what's happening due to the external load applied to maintain the equilibrium..hence..its a internal bending moment diagram..
Incredible. I’m blown away by your ability to take my college courses and cram nearly a semester’s worth of information into a sub-20 minute UA-cam video. Thank you so much!!
You have no idea how helpful this is, wow. You're doing god's work
I have never been good to Strength of Materials. Could never depict how bending moment was acting. The verry much elaborative animation did really help me. Thank you verry much. Keep on making such good educational videos.👍✌✨
If only this was available in my college years... would help prevent several bad grades hehe Thanks for your work, and keep being efficient, Engineer!
Currently studying for my FE after a year and a half out of school, and more than 4 years since taking statics... This was perfect.
Okay ! So I wasted four years of my life and tons of money and learnt nothing and this guy is teaching sooooooooo amazingly. Man you deserve more recognition .
Not even halfway with the video, but had to come to the comments section. Thank you so much!
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Very nice as always.
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Omg it's just awesome
May i know how you are making these videos which software you are using to make it so easy to understand
even I am having same doubt
Extra-ordinary lecture. Animations, diagram!!!!!!!!
Great work
Thank you Sir
Nice presentation. straight to the point with the minimal drawings.
You have a great potential to explain hard concepts in a very easy way, please make videos on more advanced concepts in mechanics of materials and machine design... All the best 'the efficient engineer'
Turns out it's math I need to work on
This video was TOO beneficial thanks for all efforts that you spend during the process of preparing to this video.