Assertion: crack | /r/CapableOf | propagate the resistance
Facets:
value: to further crack propagation drops
type: PURPOSE
Source sentences:
text: In a falling R-curve regime, as a crack propagates, the resistance to further crack propagation drops, and it requires less and less applied G {\displaystyle G} in order to achieve each subsequent increment of crack extension δ a {\displaystyle \delta a} .