Phases of damage propagation during a windstorm

Here is a slide from my PhD defence, showing the different evolution phases of damage propagation during a windstorm ( Same simulation as the animations published here the 19/11/2014 )

And here is a serie of results (from chapter 4 of my PhD dissertation) showing the two main phases ( 1 - damage start/ first minor gust (dashed line) and 2 - damage propagation acceleration/ more important gust (continuous line). Phases 1 and 2 can be the same, phase 2 can never occured.

These different cases are related to a study concerning the effect of foliar area reduction on damage propagation.