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Polymer matrix composites have shown improved properties over traditional materials especially when considering weight normalized properties such as specific strength and stiffness. While this has been known for some time, the implementation of composites as structural materials still have complications due to limitations in bonding and fastening complex geometries.  Currently, composite panels bonding is completed primarily through the drilling of holes in critical locations within the panel and securing with the use of fasteners such as rivets and bolts. The mechanical fasteners link multiple panels together and also provide an added level of protection by mechanically limiting propagation of failure originating near the bond but in the panel itself. While this process is effective there is a significant weight cost, and the manufacturing of the necessary hole geometries has significant implications for overall performance, resulting in elevated stress concentration levels and delamination in the composite panel. Mechanical fasteners have consistently lead to significant over-design and a loss in overall efficiency gained from the improved specific strength.

Effect of Surface Contamination on Composite Bond Integrity and Durability
Dwayne McDaniel (PI), Benjamin Boesl (Co-PI)

Sept 2016 – Sept 2017, Federal Aviation Administration, JAMS Center of Excellence, 12-C-AM-FIU-005

DURIP: Acquisition of In Situ Nanoindenter for Studying Deformation and Damage Mechanisms in Nanocomposites and Small Scale Features
Benjamin Boesl (PI), Arvind Agarwal (Co-PI)

June 2016 – June 2017, Office of Naval Research, N00014-16-1-2604

Effect of Surface Contamination on Composite Bond Integrity and Durability
Dwayne McDaniel (PI), Benjamin Boesl (Co-PI)

Sept 2015 – Sept 2016, Federal Aviation Administration, JAMS Center of Excellence, 12-C-AM-FIU-005