Multiscale Modeling of Composites Subjected to Fatigue Loading
Abstract
Damage tolerant approach to design, certification and maintenance of composite aircraft presentsa paradigm shift with tremendous potential payoffs in terms of affordability, light weighting andlong-term sustainment of the future Navy Warfighter. Achieving the capability to reliably predictdamage and failure under sustained and long-term operational loads using computational modelingand simulation is essential to realizing this paradigm shift in composite structural design,maintenance and certification. This project will establish an experimentally validated, multiscalecomputational framework for prediction of long term performance of aerospace composites underfatigue loading. The proposed computational framework will incorporate all damage mechanismsthat contribute to the overall performance of the composite using physics-based principles and willenable the simulation of large composite structural components in a computationally accurate andefficient manner. The fatigue damage modeling framework established through this project will bemesh insensitive and computationally tractable. A key focus of the project will be to understandhow the subcritical damage mechanisms such as delamination, matrix cracks and fiber fracture interactto provide the survivability characteristics of composites under sustained cyclic loads. Thisresearch will elucidate mechanisms of failure, and forecast lifetime performance of compositestructural components. Achieving this predictive modeling and simulation capability has the potentialto bring significant economic advantages through reduction of sustainment requirements ~by increasing the maintenance periods of assets and guiding maintenance procedures, and throughthe reduction of the weight of the structure ~ by better informing the structural design and certificationprocesses regarding the limit states of the composite.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2017
- Source ID
- N000141712040
Entities
People
- Çağlar Oskay
Organizations
- Office of Naval Research
- United States Navy
- Vanderbilt University