Zachary Graham sets Honors in the Major thesis defense date

Feb 27, 2013 -- Abstract:

Aerospace research for next-generation travel increasingly focuses on the use of advanced composites to reduce weight and cost while retaining strength. One subset of materials with great potential is based on the combination of resin matrix and glass-fiber reinforcement. The primary limitation of this material subset is the sensitivity of resin to temperature in excess of 75°C. Frequently, coatings are applied to one or more surfaces to protect the resin from heat degradation. This research explores the application of a candidate nanopaper coating with a given
composite. The composite contains repeated layers of plain-woven E-glass fiber and polyester resin. A finite element (FE) model is developed to correlate and explore the response of the composite to high temperature pre-exposure for given values of heat flux and exposure time. The model will allow the effects of this coating to be predicted for circumstances similar to service conditions. The FE model uses ANSYS general purpose finite element analysis (FEA) software to model the degradation in strength/stiffness properties based on heating conditions with the goal of predicting crack initiation using the element death feature in ANSYS. The loading conditions of the 3-point flexural test used to find the modulus of the composite are replicated, and four measurements of accuracy are developed based on the force versus displacement curves of the experimental data. These measurements are used to verify the FE model, and this model is then employed to extrapolate beyond the context of experimental conditions.

Dr. Ali P. Gordon, Chair
Dr. Seetha Raghavan
Dr. Yuanli Bai
Dr. Jihua Gou

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Dept. of Mechanical & Aerospace College of Engineering & Computer Science at the University of Central Florida
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