Innovative Analysis Tool for Damage Growth From Loaded Composite Fastener Holes

Global Engineering and Materials, Inc. (GEM) along with its team member National Institute for Aviation Research (NIAR) at Wichita State University will extend, enhance, and validate CB2ATA (Composite Bolted and Bonded Analysis Toolkit for Abaqus). The capability of using a hybrid discrete damage and continuum modeling methodology will be demonstrated via its prediction of fatigue damage evolution, remaining life, and residual strength in laminated composite bolted joints. The completion of Phase II Base program will result in a single bolted composite joint analysis tool for a flat composite component while the completion of Phase II Option will provide an enhanced CB2ATA for a curved composite structure with multiple bolts subjected to a large displacement boundary condition. In addition, a probabilistic version of CB2ATA will be developed under Phase II Option by the integration of its reduced order model with a probabilistic analysis framework. The enhanced graphic user interface will make the CB2ATA toolkit easy to use for life- and strength- predictions for depot engineers. The matured and validated CB2ATA toolkit will be applied in assisting design and certification of bolted components of the Triton system along with their sustainment.