I’m using FLAC 2D v.8 to model a slope.
I’m attempting to input n.4 joints in my model using decreased mechanical parameters than the ones that describe the rock matrix. Even though it has been used in a number of published research, I am aware that this is a simplistic technique, but that is not the main focus of my analysis.
At the end of the elasto-plastic equilibrium, every zone related to the joints is linked to a “yielding in past” condition. I would not have predicted this outcome. Do you know what might be the cause of this?
not sure what caused the yielding in the joint zones (shearing or tensile failure?), but if it’s elastic: yielding in the past, it’s because when the model is switched from an elastic model to a plastic model, if a yield is detected at that zone (i.e. the stress point is outside of the yield surface), some stress corrections will involved in the calculation, so the stress point will be dragged back to the elastic guess that’s consistent with the plastic criteria. That zone will be labeled as yield in the past, but it’s now in elastic state.
Having achieved elastic-plastic equilibrium, I would like to carry out thermal modelling and monitor the number of plasticized nodes during the application of thermal input. Currently, the fact that all the nodes that form the joints have already reached a yield condition in the past (state = 2) does not allow me to do this. Do you happen to know if it is possible to ‘reset’ this information and only count the plasticized nodes (even if they have been yielded in the past) with a ‘print’ command only after elastic-plastic equilibrium?