Open labdala opened 2 years ago
The approach for this is to increase the order of the approximation of the gradient deformation gradient. Currently we have a second order approximation. Chowdhury et al propose a correction function that is of order n+3 (eq 9). Then the non-local gradient deformation tensor is expressed in eq 15.
Goal is to try to reduce HourGlass instability by implementing the bond-associated deformation gradient tensor.
References: https://inldigitallibrary.inl.gov/sites/sti/sti/Sort_5673.pdf https://sci-hub.hkvisa.net/10.1016/j.mechrescom.2018.04.004
Try to reproduce the trend of figure 7 second paper for soft material. See if we improve hour hourglass instability
switching from the non-local deformation gradient tensor to a stabilized version of it: https://github.com/kkeonho/IBAMR/blob/kkeonho/immersed-peridynamics/src/IB/IBPDForceGen.cpp#L913-L1044