Question

In a constant strain triangle, element body force is given as ____

(a) f^e=[fx,fy,fx,fy,fx,fy]^T

(b) f^e=\(\frac{t_eA_e}{3}\)

(c) f^e=\(\frac{t_eA_e}{3}\)[fx,fy,fx,fy,fx,fy]^T

(d) f^e=\(\frac{t_eA_e}{3}\)[fx,fy]^T

This question was addressed to me in unit test.

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

Answer 1

The correct choice is (c) f^e=\(\frac{t_eA_e}{3}\)[fx,fy,fx,fy,fx,fy]^T

Explanation: A body force is a force which acts through the volume of the body. Body forces contrast with the contact forces or the classical definition of the surface forces which are exerted to the surface of the body.