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CU • News & Events

Clarkson University Professors Receive Office of Naval Research Grant for Development of a Viscoelastic-Plastic Approach to Static Strength Prediction of Bonded Joints

Release Date
Tuesday January 19, 2021
ONR

With an $800,000 grant from the Office of Naval Research (ONR) Advanced Naval Platforms Division, Clarkson University Prof. Marcias Martinez (Principal Investigator) and Prof. Craig Merrett (Co-PI) from the Department of Mechanical and Aeronautical Engineering in collaboration with Prof. Sumona Mondal (Co-PI) from the Department of Mathematics will begin work on developing mathematical physics-based models for determining the time to failure of bonded joints.

Adhesive-bonded joints are of interest for use in connection of U.S. Navy aircraft and vessel structural components. However, these joints are not currently in use, despite their potential benefits. Mechanical joints are most commonly used, but these joints are known to produce stress concentration regions, moisture ingress areas, and increased structural weight.  Reliable, adhesively bonded joints, with no metal fasteners, would reduce structural weight and the manufacturing and operational costs of Navy assets. Widespread use of primary structure adhesive joints is hampered by the current inability to predict and measure the adhesive bond strength. As a result, industry and the U.S. Department of the Navy demands for lower structural weights and reduced part counts on their assets must compete with the high safety standards demanded by the certification authorities.

This fundamental research will be performed in collaboration with members of the Carderock Division, U.S. Naval Surface Warfare Center in Maryland. Our Clarkson team is excited to bring their expertise in statistics, viscoelasticity, viscoplasticity, computational and experimental mechanics and non-destructive inspection techniques to assist the U.S. Navy in the development and improvement of novel structural joining methods. The team will be engaged with other NATO Science and Technology colleagues in the development of life assessment techniques of these critical assets. Through this ONR grant, Prof. Mondal plans to build multidimensional prediction models for static strength that could comprehensively identify the important factors and their complicated interactions, thus enabling the advancement of our understanding of the stochastic nature of adhesives through Bayesian analyses.

Furthermore, the funding received will allow Prof. Martinez and Prof. Merrett to hire a full-time Ph.D. student, manufacture a stress-relaxation rig, conduct computational simulations, and complete extensive experiments at both the Holistic Structural Integrity Process Laboratory (HolSIP) and the Aero-Servo-Thermo-Viscoelasticity Laboratory for the next 5 years.

As a private, national research university, Clarkson is a leader in technological education and sustainable economic development through teaching, scholarship, research and innovation. We ignite personal connections across academic fields and industries to create the entrepreneurial mindset, knowledge and intellectual curiosity needed to innovate world-relevant solutions and cultivate the leaders of tomorrow. With its main campus located in Potsdam, N.Y., and additional graduate program and research facilities in the New York Capital Region, Beacon, N.Y., and New York City, Clarkson educates 4,600+ students across 95 rigorous programs of study in engineering, business, the arts, education, sciences and health professions. Our alumni earn salaries that are among the top 2.5% in the nation and realize accelerated career growth. One in five already leads as a CEO, senior executive or owner of a company. To learn more about Clarkson University, go to www.clarkson.edu.


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News directors and editors: For more information, contact Jake Newman, Director of Media Relations, at 315-268-6764 or jnewman@clarkson.edu.

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