Elasticity/Sample quiz4


 * 1) What is the number of governing equations in the linear theory of elasticity ?  What is the number of unknowns ?
 * 2) The Lame-Navier equations represent the equilibrium equations in terms of displacements.  Why are these equations rarely used ?
 * 3) What are Michell's equations (use words) ? How are they different from Beltrami's equations?
 * 4) Why do we need boundary conditions ? Can I apply full traction and displacement boundary conditions at the same point ? Do boundary conditions have to be applied at all points on the surface of a body ?
 * 5) What is St. Venant's principle ?
 * 6) What is the superposition principle ?
 * 7) I have done a lot of algebra and come up with two different solutions for the same linear elasticity problem.  How do I know which solution is correct ?
 * 8) Give an example of a problem where the Betti-Rayleigh reciprocity relations can be used.