Love you Jeff. My whole engineering class owes you their grades.
@JonathanBlackwood16 жыл бұрын
The best explanation I’ve seen so far !!! Literally learned the method by watching the video once !!!
@pradanator5 жыл бұрын
"Low stress man" in a hippie voice, man I love Dr. Hanson😂
@McBobtheruggaman6 жыл бұрын
4:01 "E for Eluminium!"
@Skystrike705 жыл бұрын
This channel is a treasure trove
@imGool2 жыл бұрын
THANK YOU JEFF HANSON!!! You are the savior of my solids grade
@DavidDiaz-sq5ws3 жыл бұрын
Dr. Hanson I appreciate this sooooooooo much.
@whatruwaiting48596 жыл бұрын
i wish i had a teacher like you
@rahmanrahmani28965 жыл бұрын
Thanks millions for all your tutorial and very much appreciated. They are very well presented and easy to follow. Could you do a few steel portal frames with different base connections. You are a living legend and I am sure your outstanding work get appreciated by your followers !!! Kind regards, Rahman
@Come2Daclub6 жыл бұрын
Hello Dr. Hanson, I would like to let you know, that you have been mistaken while you looked up the value of the coefficient of expansion, as the material that the question has is 2014-T6 Aluminum not 6061-T6 Aluminum. thanks, best Regards
@anthonysawaya61427 жыл бұрын
you are amazing you solve totally different from the book and from my doctor
@tammyhuynh20604 жыл бұрын
BLESS YOU FOR MAKING THIS VIDEOS
@jordicoenders25884 жыл бұрын
Jeff, you're a legend
@fahriali30414 жыл бұрын
Also, KSI means Kips per square inches, so it's better to use inches for this types of question.
@BritPopLivesOn726 жыл бұрын
I think that the main take away from this video is that since these materials are fixed in place, the total deformation of all three rods together is zero. All rods expand due to temperature rise, so the walls respond with a compressive force, which decreases the length of each member. I think this was a good video but writing out the entire equation of total deformation would help clarify the process.
@njabulobuthelezi40365 жыл бұрын
So it the temperature was increasing, the force would have been the tensile force?
@felipegarcia22694 жыл бұрын
I believe that at @ the co. of thermal expansion for 2014-T6 is 12.8 not 13.1 (6061-T6). and E is 10.6 not 10.0
@danielbadel12265 жыл бұрын
A quick comment Normal stress it's not force over area. Dimensionally speaking indeed it's. How ever it's more than that. Sigma=F/A is only valid for pure traction force, however with bending we can obtain a contribution for normal stress. Recalling the DSV solution (Valid for slender, isotropic, homogeneous and compact beam -shear contribution can be neglected) Normal stress=T/A+Mx/Ixx (y) -My/Iyy (x). However ti ringrazio pero il video. Great explanation
@ellijahabarientos62443 жыл бұрын
It helped a looot thaaaanks!!!! be to God ❤
@ronniebarba84774 жыл бұрын
Galing mo talaga tatang
@Js_ping3 жыл бұрын
Better than my lecturer
@MattyP624 жыл бұрын
Oh how I wish you taught at Penn State. Great videos! Super helpful
@josemariafernandez64505 жыл бұрын
Thank you so much!! I´m enjoying this stuff
@thutieu32586 жыл бұрын
Thanks Jeff. It is very easy to understand
@LongTran-nf1hr5 жыл бұрын
Saved my grades.
@pete64617 жыл бұрын
Is this course the same as Mechanics of Materials?
@1234jhanson7 жыл бұрын
Peter Zablocki definitely!
@coolonthelowe6 жыл бұрын
Pete yessir
@Skystrike705 жыл бұрын
That's what it's called at my school
@Jaycdiamond5 жыл бұрын
Thanks Jeff!
@Google245gubd4 жыл бұрын
thank you, u just saved me
@anthonysawaya61427 жыл бұрын
I have a question doctor jeff is there a systematic way you follow to come up with the compatibility equation or is it just logical depending on the case of each exercise
@puteridania004 жыл бұрын
i have question regarding this one. what if there is a gap between aluminium and stainless steel ? not the bronze. hope you can answer me asap thank you :)
@Vishnudhumale4 жыл бұрын
If temperature decrease whether we take ^T negative
@phophiligidima78894 жыл бұрын
Thank u Dr
@sanaullahkhan69115 жыл бұрын
E is for Modulus of Elasticity.
@njabulobuthelezi40365 жыл бұрын
Yes
@njabulobuthelezi40365 жыл бұрын
Thank you.
@tanujgupta83814 жыл бұрын
After I have calculated the delta for all the material, I know that force in the sections will be same. So let's say we have force P, based on delta values if we calculate the force: All the sections will have different forces. Why does this logic does not work I am confused!!
@jggarcia65375 жыл бұрын
you are the best
@puravgandhi38435 жыл бұрын
Thank you sir
@nathanielllanos85773 жыл бұрын
That helped
@evancruz40586 жыл бұрын
Dr. Hanson, for the force F, I got 1172.64 kips using the same numbers that you used in the deformation equation equaling .05 inches. How did you get 208 kips? That is not matching up with my calculator's answer?
@Hmansqd5 жыл бұрын
he incorrectly wrote the coefficient of heat expansion for aluminum. maybe that should help although this message might be late :D
@siten16 жыл бұрын
Coef. of Therm. for Aluminum should be 12.8E-6 NOT 13.1E-6
@mariagranda92584 жыл бұрын
Finally someone else who noticed the mistake. Thanks
@miseantropatagonianbaggins10575 жыл бұрын
How about change in the y detection?
@spikeoac42484 жыл бұрын
Why couldnt u do for each material: strain = L - L0 / L0 where the numerator is equal to the axial elongation, subbing in u get strain = thermal coeff * delta T then stress = E * thermal coeff * delta T I got the wrong answer doing this and im not sure why.
@MultiJames2364 жыл бұрын
I have the same question.
@MultiJames2364 жыл бұрын
Wait I figured it out, you cant do that because the bars never actually stretch because of the wall. So you need to find out the force the wall is putting in order to keep the bars from elongating.
@stanleylebrun61603 жыл бұрын
I am not sure how the are is (pi)*(r^2) using diameter, I thought it would have been (pi/4)*(d^2)
@berkantelgin5 жыл бұрын
The unit of the answer needs to be in the unit of Ibf I guess, not the Newton.
@berkantelgin5 жыл бұрын
He tried to make it correvt at the end of the video but still it's wrong. Cause, it is not 208 kips it is 0.208 kips.
@Rycamcam5 жыл бұрын
@@berkantelgin It's 208 kip
@karanchowdhary59694 жыл бұрын
Sir you know Indian languages
@PCgamerChannel4 жыл бұрын
u picked the wrong aluminum its 2014
@alisaleem54516 жыл бұрын
you're doing this problem wrong,, after you get the elongation for each bar you can apply Hook law stress = E*strain----> for Al ; stress = (10,000 ksi)*(0.0189''/48'')=3.9375 ksi.