Stiffness and Stress Stiffness Matrices

Quad

Equation 11–122 and Equation 11–123

2 x 2

Triangle

Equation 11–101 and Equation 11–102

1

Mass Matrix

Quad

Same as stiffness matrix

2 x 2

Triangle

1

Damping matrices

Same as stiffness matrix

Pressure and Temperature Load Vector

Same as stiffness matrix, specialized to edge

2

Flow Load Vector

Linear across each edge

2

Element Temperature

Bilinear across element, constant thru thickness or around circumference

Nodal Temperature

Same as element temperature distribution

Surface Pressure Load

Linear along each edge

Flow and heat flux

Linear along each edge