Got my Mechanical engineering design exam tomorrow and i wanted to revise my mechanics of materials concepts, found your video right on time. Thanks for the concise and excellent explanation.
You can sketch an approximate distribution by plotting a smooth curve between the four known values - zero at the top and bottom, and the calculated values at the neutral axis and at the joint. But then divide the shear stresses in the horizontal member by 6, since the thickness t in the formula VQ/It is 6 times greater. So there is a step in the value of tau at the joint 95 psi just below the joint, 16 psi just above.
Roz A. Hamid if the beam is symmetrical its neutral axis is in the centroid(middle) of both axes. If not, use the Transfer Formula in able to find it. Correct me if Im wrong
+Sherryann Abdulrakim If you're still interested, the 500lb was simply the shear force that is being applied downwards onto the beam, as would be given from a shear force diagram (SFD) for a beam.
It depends on where your calculations apply. In the beam flange just above the junction, the thickness is 6 inches. Just below the junction, it's 1 inch. If the beam section is made up of members that are glued together, and you are trying to find the shear stress in the glue, then the thickness is 1 inch, since the glue line is only 1 inch wide.
that 5 in. long line (2.5 in. leftward and 2.5 in. rightward) of the calculated - so called - "glued region" is not subjected to the shear stress we are looking for. besides, that would have lead us to find a lower shear stress than we did.
Got my Mechanical engineering design exam tomorrow and i wanted to revise my mechanics of materials concepts, found your video right on time. Thanks for the concise and excellent explanation.
Pro tip: watch movies on flixzone. I've been using it for watching lots of of movies during the lockdown.
@Terry Kyng Yea, have been watching on Flixzone} for since december myself :D
you just don't know how awesome you are... I like the way you show the results are the same no matter what area we use.
Thanks for your video, it's always useful to have nice clear worked examples to show how to apply all the terminology!
Thank you so much for this video! I am having a hard time understanding what to include in getting Q but now, it's okay. Thank you very much! :*
me too, lol!
After 5 year I also got stuck at Q 😂🤣
@@zeeshanmalik7957 haha you can do it
@@justchillbroyus7594 ya I got that and solved 2 Examples as well,Thanks to that gay
Yo man if I pass my exam thanks to you I owe you one
Excellent presentation. Thank you.
Thank you for clearing my confusion
great video you should get more viewers. One of the best shear stress video I ever seen.
You can sketch an approximate distribution by plotting a smooth curve between the four known values - zero at the top and bottom, and the calculated values at the neutral axis and at the joint. But then divide the shear stresses in the horizontal member by 6, since the thickness t in the formula VQ/It is 6 times greater. So there is a step in the value of tau at the joint 95 psi just below the joint, 16 psi just above.
Sir I have one query, at 8:57 in denominator why do we have taken width of section as 1 inch, isn't it should be 6 inch.
This was super helpful, preesh
Thanks man,very informative. Could you describe the parabolic shear variation across the T beam from top to bottom??
btw how did you get that I=55.25in^4? how do you determine inertia?
For a rectangle, I=(b*h^3)/12
Thanks for posting this video. Could you please elaborate on what you mean by the shear stress being maximum at the N.A. if the thickness is minimal?
love your videos,clear and helpful..thankssss a looottt~ ;)
why didn't we considered the area below the point of interest? is it guaranteed to have a lower Q value, if so, how?
If you choose the area below you will the same q value. It all just depends on how you define your system
good explanation but please use microphone to enhance audibility !
thanks for the great video m8!
How do you find the neutral axis sir?
Roz A. Hamid if the beam is symmetrical its neutral axis is in the centroid(middle) of both axes. If not, use the Transfer Formula in able to find it. Correct me if Im wrong
Use sum of the y bar × area/ sum of areas
Great video
Thank you for your help
Thank you for this :)
thank you sir...
where did you get the 500 lb? sorry i dont know and i want it to know..this video really helps a lot
+Sherryann Abdulrakim If you're still interested, the 500lb was simply the shear force that is being applied downwards onto the beam, as would be given from a shear force diagram (SFD) for a beam.
+Sherryann Abdulrakim The Shear Force V could be anything and the shearing stresses would change accordingly
very good video but your voice is low :(
I think your calculation of thickness (t) is wrong ! Can you please correct me if I'm wrong ?
It depends on where your calculations apply. In the beam flange just above the junction, the thickness is 6 inches. Just below the junction, it's 1 inch. If the beam section is made up of members that are glued together, and you are trying to find the shear stress in the glue, then the thickness is 1 inch, since the glue line is only 1 inch wide.
ECUSW Wouldn't you use the equation for shear flow for a situation like this where the joints are glued?
Rick Lica You only applied the glue along where the two pieces meet, which is the 1 in. strip
where'll be minimum shear stress? and how we'll calculate it?
Usama Naeem 0 on the outside?
Thank you
I think you stole this from another channel. I've seen it at the original source
thank you sir
Ty🙏🏼
Thanks man
yeah I think thickness (t) should be 6 inches
that 5 in. long line (2.5 in. leftward and 2.5 in. rightward) of the calculated - so called - "glued region" is not subjected to the shear stress we are looking for. besides, that would have lead us to find a lower shear stress than we did.
Andy Chuang You only applied the glue along where the two pieces meet, which is the 1 in. strip
can't hear one f'ing word u said. great job
That saliva swishing around was so distracting. But good video
I love you
@6:00
Please can speak in Arabic