Internal Force

Glossary Term

Internal forces are forces and moments acting within a body.

Types of Internal Forces

Internal forces are axial forces, shear forces and moments.

  • An axial force acts on a member parallel to the member axis.
  • A shear force acts normally to the member axis. In the case of a member, there is usually a difference between the loading in the y- and z‑direction.
  • In the case of a moment, a distinction is made between three loadings in the y- and z‑direction (bending) and about the longitudinal axis (torsion).

Internal Forces in RFEM/RSTAB

In RFEM/RSTAB, it is possible to evaluate the determined internal forces in tables and graphically. In RFEM, there are also the surface and solid internal forces available.


Internal force


RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD