Answer the following problems in detail.
problem 1) describe Potential Energy approach used in FEM in detail.
problem 2) In what circumstances are the triangular elements useful in FEA?
problem 3) prepare down the shape functions of a four-node quadrilateral element.
problem 4) Why is FEA considered as the approximate solution method? Describe in detail.
problem 6) describe the use of quadrilateral element in detail.
problem 7) prepare down the difference between the cartesian coordinate and natural coordinate system.
problem 8) What do you mean by isoparametric elements?
problem 9) prepare down the Gauss Quadrature rule used in FEA.
problem 10) Mention Saint Venant's Principle. Describe the Rayleigh-Ritz method used in FEA.