7.4 Phase 3 - Model development
135
Stage ①
No visible damage
Stage ②
Core shear buckling
initiated
No face sheet damage
visible
Stage ③
Core shear buckling progressed and potting-face
debonding initiated
Top face shear damage visible
Stage ④
Potting-face debonding almost completed
Face shear damage progressed
Stage ⑤
Face sheet rupture visible
Debonding of face and core
visible due to tensile core
failure beneath top face
Figure 104 Visual damage in virtual test for the five identified progression stages in case of FP-10101