Impact, and tension after impact of composite launch space structure

摘要

A new sod effective impact and post impact methodology is described to identify the durability sod damage tolerance criteria, of the launch space structure. The GENOA progressive failure analysis (PFA) commercial software successfully verified the Delta IV launch space structure. GENOA PFA software was utilized to simulate sod verify composite monocoque (G30-500) panel, under impact, and Tension After Impact (TAI). Impact and post impact simulations include verification and prediction of: 1) load and Impact energy, Impact Damage Size, 3) Max Impact Peak Load, 4) TAI, Residual Strength, 5) Maximum displacement, 6) fractional contribution of failure modes to the total failure mechanisms, 7) Prediction of impact load versus time, and 8) damage, and fracture pattern. A composite monocoque structure was simulated under impact loading, and tension after impact loading using several lagrangian updating techniques. Simulation results were compared with the impact sod tension failure test data, correlation and verification was obtained that included: 1) impact energy, Impact, 2) Damage Size 3) Max Impact Peak Load, 4) TAI Residual Strength, 5) Maximum displacement and 6) failure mechanisms of composite monocoque structure.