Towards a Predictive Design Methodology of Composite Laminates and Patches:Physical Models of Environmental and Thermal Sensitive Failure Processes

摘要

Once damage initiates, the stress distribution at the notch tip is altered by thegrowth of splits and delaminations and ultimate failure is controlled by the maximum notch tip stress in the load-bearing 0 degree plies, sigma(0p). A damage-based model for notched tensile strength has been assembled, using the results of both finite element analysis and Weibull experiments. Thermal residual stresses are included into the model. Additional energy contributions are suggested that may arise due to interlaminar effects not included in the 2-dimensional finite element model.