Question

For a triangular element,element displacement vector can be denoted as ___

(a) q=[q1,q2,q3]^T

(b) q=[q1,q2]^T

(c) q=[q1,q2,……q6]^T

(d) Load vector

This question was posed to me during an internship interview.

My question is from Two Dimensional Problems topic in chapter Two Dimensional Problems using Constant Strain Triangles of Finite Element Method

Answer 1

The correct choice is (c) q=[q1,q2,……q6]^T

The explanation is: The displacement components of a local node is represented in x and y directions, respectively. For that we denote element displacement vector as

   q=[q1,q2,……q6]^T.