Progressive Fracture of [0/90/ + or - Theta]s Composite Structure Under Uniform Pressure LoadS-Glass/epoxy [0/90/plus or minus theta]s for theta =45 deg., 60 deg., and 75 deg. laminated fiber-reinforced composite stiffened plate was simulated to investigated for damage and fracture progression under uniform pressure. An integrated computer code was augmented for the simulation of the damage initiation, growth, accumulation, and propagation to fracture and to structural collapse. Results show in detail the damage progression sequence and structural fracture resistance during different degradation stages. Damage through the thickness of the laminate initiated first at [0/90/plus or minus 45]s at 15.168 MPa (2200 psi), followed by [0/90/plus or minus 60]s at 16.96 MPa (2460 psi) and finally by [0/90/plus or minus 75]s at 19.3 MPa (2800 psi). After damage initiation happened the cracks propagate rapidly to structural fracture.
Document ID
20070014754
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Gotsis, Pascalis K. (Technological Educational Inst. of Larissa Serres, Greece)
Chamis, Christos C. (NASA Glenn Research Center Cleveland, OH, United States)
Gotsis, Christos K. (Aristotle Univ. of Thessaloniki Greece)
Mouratidis, Ericos (Technological Educational Inst. of Larissa Serres, Greece)