# Calculating traction fields

1. May 18, 2012

### SP90

1. The problem statement, all variables and given/known data

Question (specifically part b):

Solution:

3. The attempt at a solution

My issue is that I don't agree with $\Gamma^{0}_{3}$ and $\Gamma^{1}_{3}$, surely if they're given by $[n]$ they should be given by $\mp(0,0,\rho g x_{3})$. The answers they have don't make sense, because traction fields should satisfy $t(-n,x) =-t(n,x)$ (i.e. every reaction has an equal and opposite reaction).

Can someone point out to me where I'm going wrong?

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