Epoxy-matrix composites with improved fracture toughnesses, tensile strengths, and impact resistances are fabricated by using perforated film to break part of bond between laminae. Separation diffuses local stress concentrations near cracks, inhibiting their ability to propagate. Tests on modified panels showed fifty percent increase in fracture strengths.
Partial interlaminar separation for composites
NASA Tech Briefs ; 3 , 1
1978-06-01
Miscellaneous
No indication
English
Interlaminar fracture of composites
NTRS | 1985
|Measuring the Interlaminar Shear Strengths of Composites
NTRS | 1987
|