Effects of Hole Perpendicularity Error on Mechanical Performance of Single-Lap Double-Bolt Composite Joints

Table 4

Material property degradation for each failure criterion.

Model of failure	Material properties degradation rules
Matrix cranking failure	,
Matrix crushing failure
Tensile fiber failure
Compressive fiber failure
Fiber-matrix shear-out failure
Delamination onset in tension
Delamination onset in compression