Question

In two dimensional modeling, body force is denoted as ___

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

(b) σ=Dε

(c) q^‘=lq

(d) f=[2|i-j|+1]

This question was addressed to me in class test.

My doubt stems from Two Dimensional Problems in section Two Dimensional Problems using Constant Strain Triangles of Finite Element Method

Answer 1

The correct option is (a) f=[fx,fy]^T

To elaborate: A body force is a force that acts throughout the volume of the body. Body forces contrast with contact forces or the classical definition of surface forces which are exerted to the surface of the object. Body force is denoted as

   f=[fx,fy]^T.