The postprocessing output automatically produced by PipeLay is presented in two files; the Tabular Output file (which is output in two types, analysis.tab and analysis.csv) and the Analysis Report file (analysis.prp). This type of postprocessing can be enabled or disabled for each individual analysis stage.
The material types used in your model determine the automatic format of the outputs generated by the automated postprocessing facility. If your model includes any non-linear material specification, then the results are automatically presented in terms of strain. Otherwise, the results are automatically presented in terms of stress, such as bending stress, allowable stress and so on. The reason for this is that bending stress cannot be computed for non-linear materials defined using the Moment-Curvature or Ramberg-Osgood specifications. PipeLay solves for displacements, from which bending strains are readily computed. If a non-linear material is defined using the Stress-Strain specification, PipeLay can compute the bending stress from the bending strain using the user-specified direct stress-strain relationship. However, if the material is defined using the Moment-Curvature or Ramberg-Osgood specifications, it is not possible to relate bending strain to bending stress.
Note that in the case of the tabular output file itself, there is an option on the Installation Stages tab of the Analysis component to change the automatic presentation behaviour described above and force PipeLay to explicitly output in terms of either stress or strain. That being said if stress output is enforced for non-linear materials defined using the Moment-Curvature or Ramberg-Osgood specifications then the presented bending stress and any dependent variables will be set to zero in the tabular output.