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Design, Manufacture, Evaluation, and Multi-physical Modeling of Aerospace Composite Materials for Enhanced Reliability

SC

University of South Carolina/NASA Langley Research Center, Human Exploration & Operations, Aeronautics, and Space Technology Mission Directorates

The program addresses the need to follow, understand, and predict the details of how distributed damage accumulates and combines to reduce the strength, stiffness, and life of composite materials. This is likely to provide guidance in the development of innovative composite materials with enhanced reliability for NASA relevant applications. The specific scientific goals are to develop methodologies that will quantify observed material state changes in terms of variable(s) that are directly sensitive to local changes and capable of carrying the local effects (nano/micro) into global continuum formulations; to visualize and explore physical changes in material state within composites when subjected to synergistic loading conditions; To establish a framework for multi-足physical model of damage evolution and life prediction for different applied conditions; and to provide material design guidelines for the development of tailored composite materials with enhanced reliability and survivability in extreme environments. Prof. Reifsnider delivered 3 key note lectures in international conferences and Dr. Majumdar was invited by the National Academy to speak at the workshop on material state awareness which focused on reviewing the state of the art and discuss future technical needs.

We have launched ongoing work to understand damage modes and mechanisms using non-足 destructive visualization tools. Broadband dielectric characteristic data will be collected as a function of loading history (static and fatigue). The signature of material response will be validated using X-足ray microscopy and correlated with modeling parameters (such as change in stiffness and strength). An example of X-足ray image of carbon fiber reinforced composite is shown below and scan parameters can be further customized for each material system to yield best contrast of heterogeneous microstructure.

Dr. Prasun Majumdar, Science PI, Assistant Professor, University of South Carolina

www.nasa.gov/epscor/stimuli

Dr. Cheryl A. Rose, PhD, NASA Technical Monitor, Langley Research Center

NASA EPSCoR Stimuli 2014-15

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EPSCoR Stimuli 2014-15  

NASA Office of Education’s Aerospace Research & Career Development (ARCD) is pleased to release NASA EPSCoR Stimuli, a collection of univers...

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