How do I prove that during a loading session of a glass container, between two failure modes, overstressing or buckling, which will happen first via FEA? Is there any scientific way of approaching this problem? Possible references will also be appreciated.
Many Finite Element programs (such as ANSYS) will comes with several modes for their model. ANSYS comes with a buckling mode as well as a normal stress mode. Simply run the same model in both modes and review. You should find that your answers will tell you the maximum stress (for the stress model) and the maximum load for the buckling. Then you can run factors of safety on both modes. Bear in mind that buckling in FEA is highly sensitive to flaws, smaller than can usually be detected. As such, the results are almost always taken to be about 80% lower for most models and it is suggested that a scale model be built and crushed in a test lab to ensure accuracy.