Linear 2D element analysis : Analysis & results

Analysis

Linear analysis of 2D elements is carried out in the same way as linear analysis of skeletal structures.

Results

The same set of results is available from a 2D element analysis with a number of additional results for forces and moments, and stresses in 2D elements.

Results for 2D analysis are often most easily understood graphically. This can be done by selecting the Graphics > Display > Settings > Contour settings or Graphics > Display > Settings > Diagram settings commands or the Contour settings or Diagram settings buttons on the Graphic display toolbar. Details of results available and how they can be viewed are in the Results display options section.

Unlike analysis with beam elements there is no requirement for continuity of stress and force results across 2D elements so contour discontinuities are to be expected. The user may choose in the contour settings to average the results at the nodes giving smooth contours, but this should not be done until the user is satisfied that the discontinuities are minor, so as not to mask poor results. Large discontinuities indicate that the mesh is too coarse. 2D elements results are discussed in more details in Interpreting data and results – 2D element results.

If all results for 2D elements are stored the model can become very large, so the user may select which force and stress results to store. This can be done from the Tools > Preferences menu command; select Results and select the 2D element results that are required. This has no effect on existing results and only affects subsequent analyses.