Date October 29, 2026
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Rodney James Clifton: In Memoriam

Rodney James CliftonWith a heavy heart, we share that Rodney James Clifton, Rush C. Hawkins University Professor Emeritus of Engineering, passed away on October 23, 2026, at age 89. He is remembered as a devoted husband to Mercadee and a caring presence in the lives of their four children: Brad, Jeff, Gregg, and Anne. The loss deeply saddens Brown University and the mechanics and engineering science communities.

He was born on July 10, 1937, in Orchard, Nebraska. He excelled in science and math at rural schools, earned a B.Sc. in civil engineering from the University of Nebraska in 1959, and worked as a structural engineer. Inspired by structural mechanics, he pursued graduate study at Carnegie Institute of Technology (now Carnegie Mellon), earning his Ph.D. in 1964. Since then, Rod has become a world authority on the mechanics of dynamic material behavior, with pioneering work in experimental solid mechanics and high-strain-rate materials testing, including inventing numerous instruments and developing advanced plate-impact experiments. He also contributed to hydraulic fracturing and oil recovery technology at Terra Tek Inc., conducting research and helping develop commercial software to predict fracturing patterns. At Brown, he supervised more than 30 Ph.D. students and was known for his personal guidance and for inspiring independent thinking. His former students now make significant contributions in experimental mechanics worldwide.

student and professor reviewing experiment
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As testament to his prolific mentorship, Clifton's academic tree produced more than 30 Ph.D. graduates who have gone on to advance the field of experimental mechanics.

professor and student reviewing project
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Known for embedding cutting-edge research directly into instruction, Clifton often involved students in specialized lab equipment design. Beyond traditional engineering students, his courses in continuum physics and material behavior served graduate researchers across physics, applied mathematics, and materials science.

clifton in class
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During Clifton's 40+ year teaching career, he oversaw 14 honor's projects, and taught more than 18 different classes in engineering, ranging from foundational undergraduate and graduate courses on elasticity, plastic deformation, and continuous media mechanics. He instructed graduate-level seminars focusing on stress waves in solids, dynamic fracture, shear localization, and ultra-high deformation loading while mentoring students and postdoctoral researchers in specialized experimental methodologies, notably the development and application of pressure-shear plate impact experiments.

Rod Clifton and Richard James BEAM winner
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As interim Dean of Enginering in 2009, Clifton served as emcee of the formal BEAM event, presenting Richard James ’74 with one of two Brown Engineering Alumni Medals given that year. James and Clifton are two of the 11 Brown-affiliated persons to have received the William Prager medal from the Society of Engineering Science, an award named for the legendary applied mathematician who helped establish Brown’s prestigious Division of Applied Mathematics in the 1940s.

rod clifton playing baseball
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Remembrances of Clifton made mention that he, along with his wife Merc, held countless dinners to celebrate promotions, welcome new hires, and create a great sense of community building and camaraderie in all that he did for the Division of Engineering.

clifton, song and kim
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Siyuan Song’s (center) Ph.D. defense was attended by his adviser, Professor Kyung-Suk Kim (right), and his adviser’s adviser, Professor Clifton (left).

Beyond his research, Rod dedicated significant service to Brown and the engineering profession. His leadership shaped the Division of Engineering, and he held key roles such as the eighth Chair of the Engineering Executive Committee (1974-79), the third Dean of the Division of Engineering (1998-2003), Interim and Founding Dean, Division of Engineering/School of Engineering (2008–11), Director of NSF research programs (MRG: 1989-96, MRSEC: 1996-98), and president of the Society of Engineering Science (1982-83). He also served on editorial boards of mechanics journals and national committees, influencing the field widely.

He had numerous recognitions for his contributions, including Melville Medal, American Society of Mechanical Engineers (ASME) - 198l, Prager Medal, Society of Engineering Science (SES) - 1986, Member, National Academy of Engineering (NAE) (elected in 1989), Distinguished Alumni Award, Carnegie Mellon University - 1992, Murray Medal, Society for Experimental Mechanics (SEM) 1997, Timoshenko Medal, American Society of Mechanical Engineers (ASME) - 2000.

The funeral worship service will be held at Barrington Presbyterian Church, 400 County Road, on Friday, November 6th at 11:00 am. A celebration of life will be held later.

Rod Clifton and Ruth Simmons
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Clifton spent his entire professional life at Brown University, serving the university in many capacities including as Dean of the Division of Engineering from 1974 to 1979, again from 1998 to 2003, and finally from July 2008 to July 2011.

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During his decades-long tenure at Brown, spanning eight University Presidents, Professor Clifton chaired multiple major executive committees, research centers, and university-wide search initiatives.

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During his third stint, this time serving as the interim dean, it was his tireless work and vision that helped lead to the creation of the School of Engineering.

clifton signs erc beam
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Clifton was among many members of the Brown community to sign the beam at a May 2016 topping off ceremony, where the beam was then put into place atop the steel skeleton of Brown's new School of Engineering Research Center.

Freund, Needleman, Clifton
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L. Ben Freund (left), Alan Needleman (center) and Clifton were prominent mechanicians who were core faculty members in the Solid Mechanics Group at Brown University. When this photo was taken in 2006, the three made up the Division of Engineering faculty's National Academy of Engineering members.

ribbon cutting
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Key facility improvements for Brown Engineering took place under the watch of Clifton, including the renovation of wet labs and additions of computational engineering spaces in Barus and Holley. The construction of a two-story, 17,000-square-foot addition connecting the Barus and Holley Building directly to the Prince Engineering Laboratory was completed in 2000, and collaborations, including this one with the Korea Institute of Machinery and Materials (KIMM) (a major government-funded research institute in South Korea), were also hallmarks of his tenures as dean.

group photo on statehouse steps
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Clifton was a co-organizer of the 2011 symposium hosted by Brown University to honor his friend and colleague Professor L. Ben Freund, celebrating Freund's pioneering contributions to mechanics research.