Introduction to Fatigue: Stress-Life Method, S-N Curve

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  • Опубліковано 4 гру 2024

КОМЕНТАРІ • 160

  • @alinaasim9713
    @alinaasim9713 4 роки тому +28

    This is the kind of teaching that produces capable and passionate students. I wish I had you as a teacher in my university. Thank you!

    • @TheBomPE
      @TheBomPE  4 роки тому +5

      Thanks for the positive review! Come on over to Louisiana Tech University, and sign up for my class! Ha ha. Thanks for watching!

    • @sudmudmud357
      @sudmudmud357 7 місяців тому

      Wish I could… Too far , from Melbourne Australia 🇦🇺

  • @SoumilSahu
    @SoumilSahu 3 роки тому +34

    Your lectures are so good that I'm watching them for entertainment at this point

    • @TheBomPE
      @TheBomPE  3 роки тому +14

      You mean most people aren't just watching them for pure entertainment anyway?!? Ha ha.
      I'm glad you are enjoying them! Thank you for watching!

  • @kw1a
    @kw1a 3 роки тому +2

    Much obliged for this lesson! I was trying to refresh my FEA after 30+ years from college and found this video, very helpful.

  • @soronemus8815
    @soronemus8815 3 роки тому +2

    I have a BSME/MSME but chose to focus on robotics/electromechanical. 6 years out of grad school, I am stumbling upon your videos. It is really nice being able to re-live the lectures that I once sat through, explained in a slightly different way. It's like all of this knowledge that I haven't used since the final exam rushes back to me at once! Almost makes me wish I had pursued a career in machine design. Thanks for recording/releasing this extremely well done lecture! It was a pleasure to watch.

    • @TheBomPE
      @TheBomPE  2 роки тому

      I'm glad you enjoyed it! All the best to you in your career!

  • @littleakku2799
    @littleakku2799 3 роки тому +6

    Great lectures for professional engineers like me to refresh concepts and use in our day to day work.

    • @TheBomPE
      @TheBomPE  3 роки тому +1

      I'm glad I could help! Thanks for watching!

  • @corrdude
    @corrdude 2 роки тому +1

    Puts Shigley, "M.E. Design" 4th edition, pg. 286 to shame. Really strong and clear for the first time since 1988 when I had to do this for a grade at UC Berkeley. Thanks.

    • @TheBomPE
      @TheBomPE  2 роки тому

      I'm glad you found it clear! Thanks for watching!

  • @nave2n
    @nave2n 2 роки тому +1

    I am refreshing my entire mechanical engineering. Thanks to you. Your videos are much helpful.

    • @TheBomPE
      @TheBomPE  2 роки тому +1

      I'm glad I can help! Thanks for watching!

  • @frederickschulze8014
    @frederickschulze8014 3 роки тому +1

    I'm an aero major and I'm learning this stress analysis stuff for my job because I didn't learn it in my major. I remember in those undergrad classes, I probably only truly paid attention to less than half of what the professor said in class. Yet, watching this video, I'm surprised that I found myself completely focused throughout the whole thing. Whatever you're doing, it works!

    • @TheBomPE
      @TheBomPE  2 роки тому

      I'm glad you like the videos! Thanks for watching!

  • @victoriavictoria7825
    @victoriavictoria7825 4 роки тому +3

    Thank you so much for these videos, Sir. Your help and providing these lectures for free is beyond appreciated!

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad they are helpful! Thanks for watching!

  • @RaulGerardoHuertasPaiva
    @RaulGerardoHuertasPaiva 3 роки тому +1

    I had to watch this three times, but I finally have my mathematica routines working. Thanks!!!!!

    • @TheBomPE
      @TheBomPE  3 роки тому +1

      I'm glad I could help! Thanks for watching!

  • @Felipe-53
    @Felipe-53 5 років тому +1

    Sir, you are a GOD. Pardon the expression, but you are saving a lot of asses like mine.
    You speak with clarity and in logical sequence and most importantly you are able to get us excited about the subjected you're lecturing. Thank you so much!

    • @TheBomPE
      @TheBomPE  5 років тому

      I'm glad you find it helpful, but no, I'm no deity. I'm not even that good as a person a lot of times! I do enjoy this material though, and I'm glad it is contagious!

  • @sudmudmud357
    @sudmudmud357 7 місяців тому

    It’s like music to my ears. Absolutely interesting to listen and maturing of explaining techniques and communication is another level. Fantastic 🧠
    Was a FnDT engineer for 4 years… feels stupid being a robot without a deep understanding after listening to you .. Bless this lecturer. 🙏🙏🙏

  • @YahyeMohamed
    @YahyeMohamed 3 місяці тому

    I am going to do a four point bending fatigue test soon. Your lecture helped me a lot, God bless you, i wish i had a teacher like you when i was a BS. Student

  • @dogansahutoglu2073
    @dogansahutoglu2073 4 роки тому +8

    that was the most interesting video. I was always scared from fatigue loading, now that I watch this video I am good to go.

    • @TheBomPE
      @TheBomPE  4 роки тому +1

      I'm glad it helped! Thank you for watching!

  • @infinite-journey
    @infinite-journey 3 роки тому +1

    Have 2 Masters, but never understood concepts clearly then. Watching your videos and relearning again. Thank you for giving me another opportunity at learning. Really grateful 🙏

    • @TheBomPE
      @TheBomPE  3 роки тому +1

      I'm glad I could be of some help!

  • @ChukwudiOkoro-c9s
    @ChukwudiOkoro-c9s Рік тому

    This is perfectly on point, just about the best teaching I've ever seen on the topic

  • @kameronwilliams723
    @kameronwilliams723 Рік тому

    Brings me back to the classroom. I can't imagine a better way to review for the MD&M exam.

  • @Wand377
    @Wand377 4 роки тому +2

    very clear, and also the presentation is very good. the quality of the the video is well above the online classes of my university and I paid like $5000 for each course

    • @TheBomPE
      @TheBomPE  4 роки тому

      Thanks for the review! I'm glad you liked it! Thanks for watching!

  • @babajungLA
    @babajungLA 3 роки тому

    Good refresher...everyone at the refinery talks about Fatigue. I needed a refresher course since its been a while and not much of an emphasis in Chemical Engineering.

  • @gamasb8222
    @gamasb8222 3 роки тому +1

    great lecturer. thanks for your time for teaching not only your class but the whole world.

    • @TheBomPE
      @TheBomPE  2 роки тому

      I'm glad to be able to help! Thanks for watching!

  • @b3dubbs72
    @b3dubbs72 3 роки тому +2

    I watched 5 minutes of your video and you're way better than my materials engineering prof. I'm going to watch your vids over the summer so I'm not a shitty engineer.

    • @TheBomPE
      @TheBomPE  3 роки тому

      They will be there! I'm glad they are helpful!

    • @b3dubbs72
      @b3dubbs72 3 роки тому +1

      Came back for Machine element design. Didn’t know you covered Shigley’s ❤️

  • @tahy59
    @tahy59 9 місяців тому

    Thanks Dr.I wont lie my professor at college is great but watching your video help me master concept.

  • @fufutem4679
    @fufutem4679 4 роки тому +1

    U r just one genius teacher

    • @TheBomPE
      @TheBomPE  4 роки тому

      You are very kind! Thanks for watching!

  • @heatherdisco1277
    @heatherdisco1277 3 роки тому +1

    I'm currently taking Design Machine Elements at the University of Connecticut and at this point I am no longer going/watching my professor's lecture videos. I wish I had found your channel at the beginning of the semester. Thank you for doing all of this, I will gladly share your channel with my classmates!

    • @TheBomPE
      @TheBomPE  3 роки тому

      I'm glad you are finding my content useful! I appreciate that you are promoting it among your friends! Thanks for watching, and best of luck in your studies!

    • @heatherdisco1277
      @heatherdisco1277 3 роки тому +1

      @@TheBomPE Thank you much. Hey I had a quick question in regard to the relationship you obtained for sigma_f^prime from the SAE handbook. I am using shigleys 11th addition and I cant find that information. Was curious to know if I can use that relationship in regard to a specimen that has a machined surface where I have already obtained the modified endurance limit? Also, do you always add 50 ksi to the specimen's ultimate tensile strength or does that value change with respect to different steels' ultimate tensile strengths?

    • @TheBomPE
      @TheBomPE  3 роки тому +1

      Yes they made significant changes to the 11th edition. To understand all of the steps I took in this video, it helps to have a 10th edition to reference. The short answer is that yes, you just add 50ksi (constant).

  • @watchyoutube1268
    @watchyoutube1268 4 роки тому +5

    Just found your channel - this is pretty incredible stuff

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad you're enjoying it! Thanks for watching!

  • @Rino95
    @Rino95 4 роки тому +1

    Thank you very much for the excellent Explanation of fatigue, Greetings from Perú!

    • @TheBomPE
      @TheBomPE  4 роки тому +1

      Greetings to you in Peru! I'm glad you enjoyed it! Thanks for watching!

  • @akhilsingh7917
    @akhilsingh7917 5 років тому +4

    sir i really appreciate your effort to impart quality content through this channel.🙂thank you

    • @TheBomPE
      @TheBomPE  5 років тому

      I'm glad you are finding it helpful! Thanks for watching!

  • @ravipasupuleti6974
    @ravipasupuleti6974 3 роки тому +1

    Thanks you so much for making these videos. They have been helping me in improving my technical knowledge.

    • @TheBomPE
      @TheBomPE  3 роки тому

      Glad I could help! Thanks for watching!

  • @jordanporche3707
    @jordanporche3707 4 роки тому +2

    Greatest Professor. TheBom

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad you are enjoying the class! Good luck on Tuesday!

  • @shailajabhukya220
    @shailajabhukya220 2 роки тому

    you are God sir, I'm seeing the lectures on every topic I search for. Infact the lectures are more than the topics I search for. How it is possible to be perfect in all fields like Civil, Mechanical and Electrical departments.

  • @anuragkumar1015
    @anuragkumar1015 2 роки тому +1

    You are amazing Professor, Thank you very much for the video

    • @TheBomPE
      @TheBomPE  2 роки тому

      I'm glad you liked it! Thanks for watching!

  • @prashantshinde4479
    @prashantshinde4479 5 років тому +2

    very good presentation format

    • @TheBomPE
      @TheBomPE  5 років тому +1

      Thank you! 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: ua-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html and
      MEEN462: ua-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html
      Check them out if you are interested! Thanks for watching!

  • @saiprakash04
    @saiprakash04 2 роки тому

    Great lectures. Learning so much from these video series. Very useful to refresh fundamental mechanical concepts.

  • @pranushmaharjan9787
    @pranushmaharjan9787 2 роки тому +1

    Great video my uni professors suggested your chanel :))

    • @TheBomPE
      @TheBomPE  2 роки тому

      Wonderful! I'm glad you liked it! Are you in the US or elsewhere?

  • @Antuan2911
    @Antuan2911 2 роки тому

    So great lecture! As all your lectures.
    To learn new or to refresh some old knowledge.
    So helpful for engineers from other fields, Civil in my case.
    Thank you!

  • @hardiknasit6296
    @hardiknasit6296 3 роки тому

    Thanks for making video of about fatigue as it will be very help for me in my study. I would like to request you to please explain little bit about Basquin’s law

  • @garrettcrosby5846
    @garrettcrosby5846 6 років тому

    I like the new notes system. Looks really clean

    • @TheBomPE
      @TheBomPE  6 років тому

      Thanks! It seemed like it would be helpful.

  • @Pauldyke
    @Pauldyke 4 роки тому +5

    Structural engineer with a civil engineering background 🖐. I do a lot of fatigue analysis.

    • @TheBomPE
      @TheBomPE  4 роки тому +1

      My apologies! I didn't mean to say or imply that civils never do fatigue analysis. I probably should have been more focused on saying that our ME program at Louisiana Tech features a lot more fatigue analysis than the civil program does. Thanks for the feedback!

  • @powerparashuram
    @powerparashuram 4 роки тому +1

    Very much interesting

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad you liked it! Thanks for watching!

  • @thismatters7498
    @thismatters7498 2 роки тому +1

    Every Engineering prof makes the face at 28:42 when they reference a handbook.

    • @TheBomPE
      @TheBomPE  2 роки тому +1

      I love this comment!

  • @RyanD808
    @RyanD808 6 років тому +2

    Needed this bad! Thank you!

  • @longBowHunterII
    @longBowHunterII 5 років тому +1

    Thank you Professor

    • @TheBomPE
      @TheBomPE  5 років тому

      Glad you find it useful! All the best!

  • @mintesenotjakamo3629
    @mintesenotjakamo3629 4 роки тому +1

    Good job!

    • @TheBomPE
      @TheBomPE  4 роки тому

      Glad you liked it! Thanks for watching!

  • @Iplayforhim16
    @Iplayforhim16 4 роки тому +1

    Thank you!

    • @TheBomPE
      @TheBomPE  4 роки тому

      Glad you liked it! I hope you're ready for this quarter!

  • @gazzzada
    @gazzzada 3 роки тому

    It seems that the gyroscopic effect was completely ignored in the loading model in the last example ... In the classic fatigue setting of Völler, the model is different and includes a steady mass that creates a bending moment for a rotating shaft.

  • @SalimAbid-c2h
    @SalimAbid-c2h 9 місяців тому

    Thanks, doctor
    I have a question ?
    When analyzing metal fatigue, should we prioritize the first plastic strain or the equivalent plastic strain? How might this choice impact the accuracy and efficiency of our results?

  • @longBowHunterII
    @longBowHunterII 4 роки тому +1

    Very Well Done Video, Thank you,
    Question is there a Handbook out there with Common American Steels SN Curves with Carburizing Steels?

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad you enjoyed it! Have you tried the Atlas of Fatigue Curves?

  • @HolyDiver22
    @HolyDiver22 4 місяці тому

    Is this considered the stress-life method? My lectures only covered applying Goodman's Criterion with adjusted endurance limit right out of the gate, and I am a bit confused at this point. My textbook(Shigley's 11th ed.) does not solve in this way, rather applies an adjusted von-mises stress without great detail of any underlying development of the equations. It is extremely hard to find supplement for this topic. Your lecture helped me tremendously, but there are gaps in connecting the relation with Von-Mises stresses.

  • @pseudorealityisreal
    @pseudorealityisreal 2 роки тому

    Tom Selleck traveled back in time to teach Mechanics of Materials...::grabs popcorn and starts watching::

    • @TheBomPE
      @TheBomPE  2 роки тому +1

      3qbqmv3k0dsayahrd3pw8jru-wpengine.netdna-ssl.com/wp-content/uploads/2018/08/GettyImages-3142143-327x500.jpg

  • @rojmarahatta5560
    @rojmarahatta5560 3 роки тому

    Where do you necessarily cut the beam to find the max stress or moment?

  • @sdsssdd1987
    @sdsssdd1987 2 роки тому

    I'm a student studing mechanical eng. then I have a question about fatigue life. For example, when predicting the fatigue life of a rubber in a rubber mount, does the change in the mass of the cradle affect the fatigue life? (cradle is base frame and it is connected rubber mount) otherwise this video was GOOD

  • @lengockhanh4018
    @lengockhanh4018 4 роки тому +1

    thank you sir !!

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad you liked it! Thanks for watching!

  • @zlatanibrahimovic3425
    @zlatanibrahimovic3425 4 роки тому +1

    Fantastic Lecture!! can you share me what are using to draw all these lines and write equation? is it a tab or something else cause i am also planning to give lecture to undergraduate students.Thankyou

    • @TheBomPE
      @TheBomPE  4 роки тому

      I use a Fujitsu tablet PC running onenote 2007 and Camtasia 9. The tablet is a T901 that has good specs (Gen2 i7, 16GB ram, NVIDIA graphics, wacom digitizer). Best of luck with your class!

  • @sudhansugrahacharya7094
    @sudhansugrahacharya7094 2 роки тому

    Hi, should we consider the marin factors for calculating the stress at 1000 cycles, as we are considering it at the million cycle. also for the Ultimate stress. while drawing the SN curve for a part. in other words the curve will shift down by the factor of product of all the marin factors. Please clarify.

  • @pranavkulkarni150
    @pranavkulkarni150 3 роки тому +1

    Great Explanation! Thank you so much sir👌
    Could you please tell which book has been referred here? That would really help a lot

    • @TheBomPE
      @TheBomPE  3 роки тому +2

      I'm glad you liked it! I use Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!

    • @pranavkulkarni150
      @pranavkulkarni150 3 роки тому

      @@TheBomPE Thanks for the reply, sir🙏🙏

  • @2020-d6q
    @2020-d6q 7 місяців тому +1

    Can you please suggest a reference book?

    • @TheBomPE
      @TheBomPE  7 місяців тому

      On this material I am teaching out of Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!

  • @protonwind
    @protonwind 4 роки тому

    Great presentation, thank you! I've followed the methodology for my case (a load monitoring pin made of 17/4PH to condition H1150D) and I used the maximum calculated stress as the Von Mises stress (in my loading case). Sf(prime)1000 is far bigger than my calculated stress, which would take me into the high cycle region. The formula for "a" (high cycle) contains Se (fully corrected). Where do I take that one from? I couldn't find anywhere the S-N curve for that material and condition. Am I on the right path? Many thanks for your support.

  • @technicalknowledgesharing6701
    @technicalknowledgesharing6701 4 роки тому

    Thank you very much for this great lecturer. Please provide some more insight on fatigue analysis such as real time fatigue analysis as per international codes.

  • @ramiroarieldelsolarsandova5873
    @ramiroarieldelsolarsandova5873 4 роки тому +1

    Thanks!!

    • @TheBomPE
      @TheBomPE  4 роки тому

      I'm glad I could help! Thanks for watching!

  • @balkdermins1528
    @balkdermins1528 4 роки тому +1

    nice vid,what device are you using sir ??

    • @TheBomPE
      @TheBomPE  4 роки тому

      I use a Fujitsu T901 with a gen 2 i7, 16GB of ram, an nvidia graphics chip, and a wacom digitizer. I use Microsoft onenote 2007 for inking and camtasia for capture and editing. Thanks for watching!

    • @balkdermins1528
      @balkdermins1528 4 роки тому

      @@TheBomPE thank you sir

  • @sumans5623
    @sumans5623 5 років тому +1

    Dear professor is there a formula to find fatigue stress coefficient?? Thank you

    • @TheBomPE
      @TheBomPE  5 років тому +1

      There are fatigue strength coefficients listed for several types of materials in table A-23 in Shigley. If you are dealing with steel and you do not have specific data available for fatigue strength coefficient, you can use the SAE estimations cited in equation 6-11 in Shigley (as I did in the example in this video). If you have an experimental SN curve for the specific type of material in question, you can use equation 6-9 in Shigley as a model and do a curve fit to find the fatigue strength coefficient and the fatigue strength exponent. I'm not sure what you are starting with, but these are some possible answers. Thanks for watching!

  • @mirariham3645
    @mirariham3645 5 років тому +1

    merci

    • @TheBomPE
      @TheBomPE  5 років тому

      You're welcome, thanks for watching!

  • @mahiraliyev7435
    @mahiraliyev7435 5 років тому

    Hello Sir. Many thanks for your valuable video. Could you please advise which book can be useful for plastic/non linear analysis?

  • @rajanikshithkatta9802
    @rajanikshithkatta9802 6 років тому

    Wow that's great
    Please make another one or two videos and explain different problems based on this

  • @chutwinamree4508
    @chutwinamree4508 2 роки тому +1

    Thk

  • @maxrkmrose
    @maxrkmrose 5 років тому +1

    What is the textbook for MEEN 361? thanks.

    • @TheBomPE
      @TheBomPE  5 років тому

      I use Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!

    • @maxrkmrose
      @maxrkmrose 5 років тому +1

      Thank you very much for your work and placing it on UA-cam!

  • @mahiraliyev2296
    @mahiraliyev2296 5 років тому +1

    Hello Mr. Could you please share name of the book which you refer?

    • @TheBomPE
      @TheBomPE  5 років тому +1

      I use Shigley's Mechanical Engineering Design, 10th ed.
      Thanks for watching!

    • @mahiraliyev7435
      @mahiraliyev7435 5 років тому

      @@TheBomPE Thanks a lot Mr.

    • @mahiraliyev7435
      @mahiraliyev7435 5 років тому +1

      Hello Sir. Many thanks for your pricless support! Could you please advise which book can be usefull for plastic/non linear analysis?

  • @GideonEbelebe
    @GideonEbelebe 3 роки тому

    Please, what is the title of the material (textbook) you used in this lecture? Thanks.

    • @TheBomPE
      @TheBomPE  3 роки тому +1

      I use Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!

    • @GideonEbelebe
      @GideonEbelebe 3 роки тому

      @@TheBomPE kindly give me your email. Mine is ebelebeonline@gmail.com.

  • @cyrusIIIII
    @cyrusIIIII 5 років тому +1

    What software is this that you easily write things on it?

    • @TheBomPE
      @TheBomPE  5 років тому +1

      I use Microsoft Onenote 2007. Thanks for watching!

  • @saidnahi6540
    @saidnahi6540 3 роки тому

    Hello, i have a question that came up in my mechanical exam and it was 'Explain how fatigue affects the behavior of engineering materials, then explain how and why fatigue affects the stated behavior'. I'm confused

    • @TheBomPE
      @TheBomPE  3 роки тому +1

      The second question seems to repeat half of the first question. Who wrote the question?

  • @dogansahutoglu2073
    @dogansahutoglu2073 4 роки тому

    Sir, have you solved a beam with two end fixed , support at any point in the middle and loaded at multi points with 3 reactions yet? This could be a statically indeterminate problem.

    • @TheBomPE
      @TheBomPE  4 роки тому +1

      No, I don't have a problem like that recorded yet. It looks likely that I will be teaching a course here at Louisiana Tech University that covers statically indeterminate problems like that within the next year or so, so I'll probably get to it sometime relatively soon!

    • @dogansahutoglu2073
      @dogansahutoglu2073 4 роки тому

      Thank you sir. looking forward to it.

  • @ambasinha4993
    @ambasinha4993 5 років тому

    Sir! I am solving one fatigue analysis problem in Hypermesh using S-N method. So I needed S-N curve data so could you suggest where can I get all these data for different materials?

    • @yuzhuwang4819
      @yuzhuwang4819 5 років тому

      Try ncode matrial data

    • @ambasinha4993
      @ambasinha4993 5 років тому

      @@yuzhuwang4819 thank you

    • @ambasinha4993
      @ambasinha4993 5 років тому

      @@yuzhuwang4819 do you have any link for that?

    • @yuzhuwang4819
      @yuzhuwang4819 5 років тому +1

      @@ambasinha4993 I have this data but unless you have this software, you can't open it

    • @ambasinha4993
      @ambasinha4993 5 років тому

      @@yuzhuwang4819 OK.. No problem

  • @pisolo86
    @pisolo86 5 років тому

    Question from a young colleague, which software do you use during your lectures? PS You are a great lecturer!

    • @TheBomPE
      @TheBomPE  5 років тому

      I use Microsoft Office Onenote 2007. That is the last version where you can customize your toolbars. Thanks for the encouragement, and all the best to you!

    • @pisolo86
      @pisolo86 5 років тому

      TheBom_PE many thanks, I think I will switch to surface, since I tried and it is really amazing. I am a paper guy and always need to write to explain and it is at the moment the only device that gave me that feeling. Thanks for sharing your experience!

  • @fdta2536
    @fdta2536 Рік тому

    S-N curve is main source of analysis incorrnectnes

    • @fdta2536
      @fdta2536 Рік тому

      S is one more source of incorrectness.

  • @michaelswanbom6023
    @michaelswanbom6023 6 років тому

    If you found this video useful, consider helping me upgrade the old tablet PC I use to create these videos! Thanks!
    www.gofundme.com/help-replace-my-2011-tablet-pc

  • @basavdotikal1415
    @basavdotikal1415 6 років тому

    Sir , you ignored direct shear caused by the Flywheel, in the example!!! Thank u for the video

    • @TheBomPE
      @TheBomPE  6 років тому +4

      You're right, I did neglect direct shear. Fortunately direct shear would only add about 1.34ksi of shearing stress. Combining that with bending stress using DE theory would bring the von-mises stress to about 107.46ksi as opposed to the 107.43ksi I used in the example. I think it is OK to neglect direct shear in this case.
      Thanks for watching!

  • @balajirajendran5139
    @balajirajendran5139 5 років тому

    I couldn't follow up your next video (say your 20th lecture).

    • @TheBomPE
      @TheBomPE  5 років тому

      I'm not sure I understand. Are you having trouble viewing one of my videos?

    • @balajirajendran5139
      @balajirajendran5139 5 років тому

      @@TheBomPE Dear Professor, I couldn't trace your next video, since you didn't mention any module numbers. I just skipped lecture 20, 21 and watching 22 Marin Factor and Stress Concentration.

    • @TheBomPE
      @TheBomPE  5 років тому

      Ah, I understand now. There aren't any videos between this one and the one about Marin factors. You probably saw the numbering at the top of my notes... these are the meeting numbers where I began those lectures in the term when I recorded them. Don't worry about the numbers too much, I have everything put in the proper sequence in the playlist.

    • @balajirajendran5139
      @balajirajendran5139 5 років тому +1

      @@TheBomPE Thank you professor, Love your way of lecturing.

    • @TheBomPE
      @TheBomPE  5 років тому

      I'm glad you find it helpful! Thanks for watching!

  • @gazzzada
    @gazzzada 3 роки тому

    Thank you! ua-cam.com/video/ZsIwEp574ho/v-deo.html Can not understand how Sigma F can be bigger than Sut (+50ksi)? IMHO Sigma ultimate is always have to be biggest value of all as it is a result of shortest test of all discussed here... (only one loading)

    • @TheBomPE
      @TheBomPE  3 роки тому

      Sigma F is just a coefficient that happens to have stress units. It is not a material strength value all by itself.

    • @gazzzada
      @gazzzada 3 роки тому

      @@TheBomPE Thank you. Well, i one couldn't tell value from coefficient... I think I have to listen the webinar again from beginning:)

  • @raviashokiyer7238
    @raviashokiyer7238 2 роки тому

    can you let us know your email id

    • @TheBomPE
      @TheBomPE  2 роки тому

      I teach at Louisiana Tech University. You can likely find me through that website if you need to contact me.