Revert "update 22/8"

This reverts commit eee6cc986957071e87ef0387088f70eaccd00e87.
fibre cohesive law and xbrick integration

fibre coh law: failure initiation and degradation are separated (no jump
from intact to almost failed, solver has to go through the triangle)
this helps to reduce the fibre failed elems, but program becomes slow

xbrick: no fibre failure for entire newpartition increment, and now
fibre failure until coh sub elem starts to fail, see how it goes