Stiffness Matrix Calculator
Free calculate structural stiffness matrix for beam elements, trusses, and frame structures in finite element analysis.
Input Parameters
Stiffness Matrix
Enter parameters to calculate stiffness matrix
Stiffness Matrix Formulas
Truss Element
k = (E × A) / L
2×2 matrix for axial stiffness
Beam Element
k = (E × I) / L³
4×4 matrix for bending stiffness