Strength of Materials: GATE 2015 (2 marks) | ME

[@souvik.fingtore]

Proud to be a subscriber of exergic channel ...even I am from civil engineering background...I am always eager to watch ur lectures 🙏🙏

[@ExergicGATE]

So nice of you!

[@mr.mysterious2368]

Fraction exponent of negative value is not possible. So we putted .0513^.1 and multiplying result by 500 then putted negative sign after calculating stress as it is compressive.

[@mr.preetam2491]

sir,how you have calculated stress 371.515,,as (-.0.0153)^(.1) doesnot exist,plz explain

[@bashamsk1288]

Same here

[@metallurgyaddict2623]

y^(a/b) = (y^a)*(y^(1/b)....so (-.0.0153)^(.1) = (-.0.0153)^(2)*(-.0.0153)^(0.05) = 0.743 because 0.1 can be written as 2/20 Just manipulation of expression refer to this following link if you don't get it math.stackexchange.com/questions/952663/negative-number-raised-to-fractional-power

[@sumitdhakad3781]

Sir here AB is true strain so should we use AB=ln(L/95) in the last step Answer is coming same but still just for a better understanding can u please clear this doubt

[@naumanashraf8012]

i was also thinking the same thing....but not able to get the answer...if you have the solution taking strain in consideration then plz send to [e-mail]

[@sherlockholmes3946]

To avoid confusion , just convert everything to our conventional stress strain values i,e engineering stress and strain. In that you need to multipy the net strain i,e (Total - elastic recovery) by initial dimension i,e 100. Answer will be the same.

[@powermtech]

calculator can not solve (-0.0513)^.1

[@vai_-cn9br]

Common sense can

[@TheJosephStalin420]

Sir to ye assume karna hai ki jo flow stress se stess aega it's beyond elastic limit?

[@adiraaz7736]

sir why didn't you use true strain concept at last stage calculation ? and other thing is that if you are taking 95mm as your initial dimension while recovery , can you explain why net length is not coming equal to zero if we assume that 95mm also lies in the elastic region. I mean to say there is a bar of 100mm and now we compressed it to 95 mm that is in its elastic region , then conceptually it should recover completely after load is removed but if I go through your method , net length change after load removal will be 95*(strain) that is different from length change after application of load i.e. 100*(strain) that means final length will not be equal to initial length that is not true for elastic region.

[@shyamalim3797]

Superb sir, I was confused and I googled this question, this is the best solution I came across.

[@MukeshYadav-wb5uo]

kzbin.info/www/bejne/gZnThY2Am7yUg9U

[@rajivsaxena8710]

see that -ve value power is 0.1 hw its possible

[@adityavikramsingh1476]

did you get the answer i also have same question??

[@shivachoudhary106]

Sir, sigma valve is coming as - 329.184 MPa, plz help

[@tirthgajrawala9408]

Sir is this included in civil engineering?

[@kangkanakalita5823]

ln(.95) shows .05129..if we use it in formula calculator shows math error...

[@rajivsaxena8710]

yes

[@onomatopoeia6787]

I request you to provide hard copy of study material as I'm not comfortable with the soft copy

[@keyurpanchal3518]

Thank you soo much. Really helped a lot.

[@shashankkumar1354]

Sir in this question they said flow stresses ...What is the meaning of flow stresses Is flow stress equal to true stress Or Is flow stress equal to engineering stress

[@kirti7754]

@@knowledgestorebyankitverma5208 could you please explain it

[@darshanmramoliya4646]

Flow stress will engineering stress or true stress , actually it's depending on strain in it's equatio..if it's true then go for it and if it's engineering then go for it

[@uditsharma3659]

Sir I want to take lecture of manufacturing Plzz enlighten Me how I can get it and what will be the prices

[@ExergicGATE]

Udit Sharma Details here: exergic.in/gate-video-course

[@uditsharma3659]

Thanks for details

[@purandarroy599]

I like ur method of teaching....Keep it up.sir I want to get a help from you.I'm preparing for gate.Can u plzz tell me the name of the good books for SOM and THERMODYNAMICS for conceptual purpose?

[@AJAYSINGH-wo7bp]

Sir FM me kuch bateye sir please

[@true_bharatiya]

So nicely explained.

[@kkidea4441]

sir plz make a video on strain energy method

[@DhananjayKumar-zx5xo]

Sir plz make a video on machine tools life

[@ranjansatishpandasatish7059]

I hv solved this questions in forging part of production...

[@MukeshYadav-wb5uo]

Oh ! Really you think that great