Composite materials have advanced material properties such as high stiffness- and strength-to-weight ratios, corrosion resistance, damage tolerance, and stealth characteristics and are being widely used for primary structural members. However, these materials are not typically applied in isolation due to insufficient stiffness and ductility of the composite compared to traditional metallic materials. Thus there has been a growing interest in combined metal and composite structures. Design of metal-to-composite hybrid joints appears to be one of the major structural challenges. Hybrid joints often entail both geometry and material discontinuities which can lead to a stiffness mismatch and cause local stress concentrations. Research at Imperial College London (ICL) and the U.S. Naval Academy (USNA) shows that among the various novel steel-to-fiber reinforced polymer (FRP) joint design, hybrid protruded joints demonstrate significant potential in naval structural applications. These joints are fabricated using a surface treatment technique called Surfi-Sculpt which uses a power electron beam to create metal protrusions onto which the FRP is laid and cured. This paper reviews the ongoing Office of Naval Research (ONR) sponsored research project focusing on the hybrid protruded joint design. Both experimental and finite element analysis (FEA) results will be discussed and compared.
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The Twenty-third International Offshore and Polar Engineering Conference
June 30–July 5, 2013
Anchorage, Alaska
Behavior of Hybrid Protruded Steel-to-Fiber Reinforced Polymer Joints
Sarah E. Mouring;
Sarah E. Mouring
United States Naval Academy
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Mary-Elyse Janowski;
Mary-Elyse Janowski
United States Naval Academy
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Reuben J. Brambleby
Reuben J. Brambleby
Imperial College London
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Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, Anchorage, Alaska, June 2013.
Paper Number:
ISOPE-I-13-565
Published:
June 30 2013
Citation
Mouring, Sarah E., Janowski, Mary-Elyse, Louca, Luke A., and Reuben J. Brambleby. "Behavior of Hybrid Protruded Steel-to-Fiber Reinforced Polymer Joints." Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, Anchorage, Alaska, June 2013.
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