A Hybrid Approach to Composite Damage and Failure Analysis Combining Synergistic Damage Mechanics and Peridynamics
Technical Report,01 Oct 2016,31 Dec 2016
TEXAS ENGINEERING EXPERIMENT STATION COLLEGE STATION COLLEGE STATION United States
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In most manufacturing processes for polymer matrix composites PMCs one starts with dry bundles of fibers. On resin infusion, the initially closed-pack fibers are spread out to the degree dictated by the intended fiber volume fraction, resulting in disordered fiber distributions and defects such as voids in the matrix. A novel procedure has been devised to create nonuniform fiber distributions by perturbing the initial dry fiber bundle. In order to calibrate the Peridynamic PD model to the representative volume element RVE used in the SDM approach, we will re-create statistical PD models with exact geometry of fibers and matrix, and manufacturing defects present. Procedures have been developed to simulate occurrence of voids of various sizes within the volume of the composite. Effect of the voids on the initiation of failure has been analyzed. The activities related to Task 2.2 cover the estimation of surface effects and effects at material interfaces in peridynarnic models of composites.
- Laminates and Composite Materials