Recent content by RAD17

I need to determine Young's modulus and Poisson's ratio from the elastic stiffnesses for a cubic crystal that is being stressed along the x axis. It is initially L *w and goes to (L+delta L)*(w - delta w). Where w is along the x-axis and L is along the y axis. How do I change stresses and...

I'm given the energy for a crystal lattice is U(Ro) = (-2Nq^2 ln(2) (1-1/n))/Ro for equilibrium separation (Ro). I need to show that the work to compress the crystal from Ro --> Ro(1-x) is 1/2Cx^2 where C = (n-1)q^2 ln(2)/ Ro. Any hints about where to start? I thought it would just...