Recent content by Nickpga

And really that's all I know how to do myself. If someone can explain/lead me through this, that will be very helpful. Thanks

I have that one too. I just had it wrong. Thanks a lot for your time and effort in asking me questions to make my mind work. I wouldn't say I am dumb, I just don't have a mind that thinks 'mechanically'.

You know. Thats what happens when the professor can't be be bothered to write legibly. I thought stress was epsilon. and strain sigma.

really? stress = strain/ Y_modulus? Thats the equation the professor boxed and starred

Alright. That makes sense. I suppose I had an imaginary force that caused the displacement. Like someone pulling it

I am confused on how you they are in equilibrium

didnt we say that the stresses are different? oh nvm. it was more of a question.

Wouldnt that imply that the forces are the same? Or would that be the strain that is the same?

oh. ok. now i am starting to catch on. (i am way better at programming than i ever will be at mechanics). so the total displacement is 10um, but that is distributed between both materials?

That the stress is different between each material?

That my assumption that both materials receive the same displacement, may be wrong?

I have a TA that is ignoring me, so I have to resort to this online forum. Also, a very unhelpful example from lecture (just 1). I have some other equations, but I don't really know how they all tie together. I find epsilon = 10um/1mm (both materials are 1 mm in length) = 1E-2mm/mm sigma 2 =...

Thanks for your time and help! I will probably have to work in regular notation and then see how to condense into the new notation.

Alright. That makes sense. Only because the previous problem dealt with the Kronecker delta as well. Thanks!

Alright. I suppose I could just write it like this and then "simplifiy" into the hyper-concise form my course uses. Wouldn't this be much better approach than doing it the "tricky" way?