AGMA Bending & Contact Stress & Strength for Spur Gears | Lewis Equation | Tooth Pitting & Fatigue
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- เผยแพร่เมื่อ 7 ก.ย. 2024
- LECTURES 25 & 26
Playlist for MEEN462 (Machine Element Design):
• MEEN 462: Machine Elem...
Playlist for MEEN361 (Advanced Mechanics of Materials):
• MEEN 361: Advanced Mec...
These lectures were recorded on November 2 & 5, 2018. All retainable rights are claimed by Michael Swanbom.
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It makes me sad that i can´t thank you in person for how much you have helped me understand this topic. Thank you very much.
I'll accept remote encouragement! Thanks for watching!
Sir. I want to thank you for taking the time and effort to put this well explained lecture.
I'm glad you found it useful! Thanks for watching!
sir u the best......I am a student of IIT Dhanbad .....whenever my friend asks me for a machine design-related topic...i straightway give them your video link...... I believe such content should reach to every mechanical engineering student. You make topic understand through problem-solving...which I just love.....plz make more and more videos on engineering machine design.
Thanks to your video I managed to pass the last exam. I wish you were my profesor of how clear you explain everything so throughly. Happy new year from Puerto Rico
Thank you very much for your classes, I have been watching many of your videos; and all of them are absolutely great (Machine design and electric circuits).
I'm glad you are enjoying the videos! Thanks for watching!
excellent work sir,this video has a lot of details and informations without any missing points. thank you for your effort and sharing this video!
I'm glad you enjoyed it! I have two courses that I teach out of this text (Shigley), and I have a good number of videos presenting this material, organized into these playlists:
MEEN361: th-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html and
MEEN462: th-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html
Check them out if you are interested! Thanks for watching!
Thank you so much. I'm designing a custom gearbox, to validate I wanna do AGMA and this is so wonderful.
I'm glad you liked it! Thanks for watching!
Thank you very much for all your efforts. Just wanted to make sure that you are aware of the effect you have on some random people on some random place on the other side of the globe.
Thank you! Glad I have helped!
What a lecture it is❤.
Taking Cp from table 14-8 instead of the equation results in a factor of safety less than one.
In case of a situation like that in a math, are we supposed to guess a different diameter for the pinion and do the math again like a trial and error method?
Thank you for your efforts in making these lectures. They are very detailed and extremely useful for students like us. A huge respect for you from Bangladesh.
Loved this helped me a lot. from Nepal thank u
Your lectures are too good!
Glad you like them! Thanks for watching!
Thank you for the clarification of the textbook concepts, it is really beneficial what you do, subscribed and liked 👍
I'm glad you are finding my videos useful! Thanks for subscribing!
thank you
thank you and i wish to give us more lectures please Dr.
I've been uploading new lectures recently! I hope you enjoy them!
Thank you so much for your explanation !!!
I'm glad you found it useful! Thanks for watching!
Ye TH-cam AJ mujhe recommend kar Raha he.....jaha kaal me exam deke Aya....itne din kaha the ...
Looks like I have viewers in India! Greetings!
Amazing videos! Thank you so much.
I'm glad you like them! Thanks for the feedback! Here are some of my other playlists in case you haven't seen them yet and might be interested:
ENGR122 (Statics & Engr Econ Intros): th-cam.com/play/PL1IHA35xY5H52IKu6TVfFW-BDqAt_aZyg.html
ENGR220 (Statics & Mech of Mat): th-cam.com/play/PL1IHA35xY5H5sjfjibqn_XFFxk3-pFiaX.html
MEMT203 (Dynamics): th-cam.com/play/PL1IHA35xY5H6G64khh8fcNkjVJDGMqrHo.html
MEEN361 (Adv. Mech of Mat): th-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html
MEEN462 (Machine Design): th-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html
(MEEN 361 & 462 are taught from Shigley's Mechanical Engineering Design)
Thanks for watching!
great lecture. thank you
I'm glad you liked it! Thanks for watching!
Really fabulous one.
This kind of teaching is only available for rich kids in india.
But because of u I too got option to learn in this way thank you.
One small double u r mentioned page no in this video. Which book your are mentioning about.
Thank you for the kind words! I'm glad I could be some help. The book I'm referencing is Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!
Thankyou so much
I'm glad you liked it! Thanks for watching!
its really useful thank you 😊
Happy to hear! Glad you enjoyed it!
Thank you very much.
Being a recent graduate, your material has been life changing. It had made sense of topics I dreaded at university. I genuinely can’t thank you enough. Would you also have anything on contact mechanics ? I am doing a ( real life ) problem of pin in a Clevis for a heavy duty door hinge and I am trying to understand the method to calculate the contact stresses that the pin would be experiencing. Thank a lot in advance.
I don't have a video exactly like that, where the distribution of stresses across the contract faces are more precisely modeled. I do have a video where I talk about bearing stress in a clevis and pin, but I just use the projected area technique, which is ok for less critical designs and ductile materials. I'll give the link in a comment below...
th-cam.com/video/3GEI41gJ0B0/w-d-xo.html
@@TheBomPE thank you so much.
Lots of love and respect from the land down under !
Glad I can help!
Well explained lecture. was really helpful and Sir can I know what was the book that you have used in the video
Glad it was helpful! I was using Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!
Hi TheBom_PE!, first I want to thank you because your classes are really helping me. Second, I have a question, I don´t understand why we choose the lower curve of YN (1:13:17). Because if we set tension allowed as AGMA Bending tension and we isolate the Security Factor (SF), with a higher YN...SF is going to be higher. And that means a more conservative design isn´t it? That´s my doubt. Thank you very much and I´ll hope your answer. Good luck!
Sir I have been watching your classes since last three years and request you to provide a lecture on discrepancies in RainFlow diagram and Miner's rule .on fatigue analysis during transient loading conditions .
I'll look into it. Thanks for watching!
Hell that's a lot of factors - I had to pause the lecture, but I am left wondering what the error rate is in comparison to Lewis
Sir, this video facilitates learning of machine design. Thank you very much. Are theses formulas available also for the gear with (positive and negative) profile shifting ?
Sir, can you explain how to find a Brinell Hardness number when it's not given to you
already analyzed a gear using ISO 6336 part 1, 2 and 3? which one do you think is more efficient, AGMA or ISO?
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@1:54:30 Figure 14-5. This list strength for contact-fatigue for 10^7 cycles and 0.99 reliability for through hardened steel gears. Shouldn't we use something for 10^8 and 0.9 reliability for this problem? How can we know how far off this is? IE is this a good estimate regardless? Would like to know so that I can make adjustments if necessary :) Thanks for all you do!
EDIT: Could you also explain difference in using S_F and S_H (for torque/force)? I am not understanding when to use which one, as from what I understood, both can be used to find out how much more force/torque one can apply. Any clarification would be much appreciated. :)
Sir Would you pls make a video on ""AGMA vs ISO Design approach for spur gear"" I really need it for assignment.🥺
What about gears that transfer motion from one gear to another, rather than just one shaft to another? Would we assume 2 (or more) fatigue cycles per revolution? I would think so, but then do we evaluate each interaction separately and find a cumulative life cycle? How do we handle the different stress from different gears in this scenario? Any chance your masks come in black? Would totally buy one if so :)
Sir, I have been to degin a gear system with the following inputs. Input speed-2350rpm, output speed-450rpm, power-10HP. For this input I have taken Epicyclic gear train arrangement with spur gear. Is this video alone be enough for use to find the stress value and FOS. Else can u recommend any other videos.
Hello. Do you mean if we have equal hardness on both gear and pinions, pinions can failures before the gear does? If it is so how deep hardness is counted for this? Sometimes it occurs HTTP on the surface with 20 micro deep, will it effect the contact strength even the hardness in deeper is much high? Or is it enough that the surface area is soft?
if i have 25 as a pressure angle, is ok to use the tables? because the tables are for 20.
is the process same for helical gears
Does the diametral pitch affect the value of J read from the chart?
The chart shown is for 20 degree pressure angle, full-depth teeth, and it is for all diametral pitch values. Other charts would have to be used for other pressure angles or non-full-depth teeth. Thanks for watching!
@@TheBomPE Thank you for getting back to me, and clarifying things for me. I was a bit confused because the chart that I was using (shigley) had a profile of a full depth teeth and below that was the statement "generating rack 1 pitch".
Sir can you make a vedio for how to calculate motor power starting from scratch i.e. want drive roll at an speed 1000rpm and min torque required is 1000Nm. ,then how gearbox and motor and safety factor calculate
I don't know if I can tell exactly what you want here, but I will keep your comment in mind! Thanks for watching!
Sir can you explain in detail about pitting concept of reverse bending what you have explained in this Lecture.
Also why we should double the pitting factor SH2 to understand torque max value will be drawn.
witch book do you use?
I use Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!
@@TheBomPE Can I ask you for a favor. To make video about differential and planetary gearbox. Or to recommend some book on that topic? Thanks in advance
@@dejannikolic4647 maybe this one will help? th-cam.com/video/tnnKGBIy5LI/w-d-xo.html
@@TheBomPE ooo yes, this is very helpfull. Thank you on video. I'm very interested in your courses. Do you have, or have in plan some course about design and calculation differential gearboxes?
1:10:10
In my book they use
YN=1.3558N^-0.0178
Why ?
Which one of you are correct?
If you watch the video you will hear me say that I'm using the lower curve on the chart as the most conservative possible value for YN (lower values are more conservative for this factor). It sounds like the example you must have seen chooses the least conservative of the potential range of values for YN.
@Muhammad Usama He uses Shigley's Mechanical Engineering Design