ONE DIMENSIONAL PROBLEM:

BAR ELEMENT:

Shape Function:

,

Weighted Integral statement:

Element stiffness matrix:

FEA equation:

Force vector due to self weight:

Temperature effect:

Stress:

Governing equations:

Trusses:

Stiffness matrix:

lm - -lm

lm -lm -

- -lm lm

-lm - lm

Where

l= m=

FEA Equation

U

Stress: