Structural Technology Evaluation and Analysis Program (STEAP). Delivery Order 0046: Multiscale Modeling of Composite Structures Subjected to Cyclic Loading.

摘要

This report documents four critical tasks concerned with the development and implementation of an advanced and novel modeling framework for predicting damage accumulation in composite structures undergoing monotonic and fatigue loadings. The critical tasks that have been completed are: (1) To enhance existing damage models to accurately capture the physics of failure of fiber-reinforced composites; (2) To develop a modeling technique that accurately captures damage accumulation due to cyclic loading; (3) To correlate predictions to experimental results being obtained at the Air Force Research Laboratory; (4) To develop improvements to modeling techniques based on empirical data. The pursuit of these four major tasks produced the methods, data, and results presented in this report. Our activities facilitate reliable assessment of the durability and damage tolerance of composite aircraft in accordance with the strategic needs of the Air Force. In fulfillment of this motive, we engaged in the development of efficient and accurate models to simulate the physical mechanisms of composite failure when subjected to monotonic and cyclic loads.