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