Elasticity/Sample quiz1


 * 1) Show the directions of normal and shear stresses on a cube of material.  Also label the arrows using the standard symbols and subscripts.
 * 2) Since you are using arrows, you are suggesting that the stresses you have shown are vectors. Are they ?
 * 3) Write down the strain-displacement relations.
 * 4) Write down the stress-strain relations for an isotropic, linear elastic material in matrix form.