Question

In two dimensional isoparametric elements, we can generate element stiffness matrix by using ____

(a) Numerical integration

(b) Differential equations

(c) Partial derivatives

(d) Undefined

This question was addressed to me during an internship interview.

This question is from Two Dimensional Isoparametric Elements in portion Two Dimensional Isoparametric Elements and Numerical Integration of Finite Element Method

Answer 1

The correct choice is (a) Numerical integration

For explanation I would say: The term isoparametric is derived from the use of the same shape functions (or interpolation functions) [N] to define the element’s geometric shape as are used to define the displacements within the element.