1. Overall description of the problem

The four-bar mechanism is a study of the coupled bending-torsion coupled behavior of a simple four-bar mechanism rotating at a constant angular velocity.

2. Input file

The input file for Dymore 4.0 is available in two formats

  1. A plain text version of the input file, and
  2. A web version of the input file.

3. Numerical results

Numerical predictions can be downloaded here for the four-bar mechanism problem. Each archive (in .zip format) contains the following information.

  1. An Octave script for plotting (.m file),
  2. Existing numerical predictions (.dat files).

The following data is available.

  1. The component of angular velocity about unit vector i3, denoted ω3, at the mid-span of Bar 1. (zip),
  2. The component of axial force in the material basis, denoted F1, at the mid-span of Bar 1. (zip),
  3. The component of bending moment about unit vector e2 in the material basis, denoted M2, at the mid-span of Bar 1. (zip),
  4. The component of linear velocity along unit vector i1, denoted V1, at the mid-span of Bar 1. (zip),
  5. The rotation of Bar 2 at point C, denoted ϕ. At point C, the Euler angles (sequence 3-1-2) of Bar 2 in the inertial basis are computed and the first angle of the sequence is plotted. (zip),
  6. The component of displacement along unit vector i1, denoted U1, at point C. (zip),
  7. The relative rotation at the revolute joint at point D. (zip).

4. Movies

The visualization of this benchmark problem simulated by Dymore 4.0 was captured on screen using camstudio.

  • Visualize the movie in you browser (Be patient 1.9Mb file), or
  • Download a zip archive of the avi file containing the same movie (Be patient 10.6Mb file).