I was curious about the ability to output axial stress (tension/compression) components of a truss model, consisting entirely of TRUSS elements. The example I used clearly has one or more members under compression, confirmed by a simple MATLAB script, but none of the available CAE output stress components, including S11, indicate "negative" stresses. Magnitudes all agree with MATLAB solution, but the tension/compression sense is not clear in Abaqus. Am I missing something? Would greatly appreciate an hints/guidance. Thanks!