U.S. Army Research Laboratory taps engineering student for fellowship

John Klein

By David Staudacher

John Klein, a Ph.D. student in materials engineering, has been selected for a fellowship award in the U.S. Army Research Laboratory (USARL) Research Associateship Program.

Earlier this year, two researchers from the composites and hybrid materials branch of the USARL visited UIC and met with Eduard Karpov, associate professor of civil and materials engineering, to discuss opportunities for collaboration.

Klein, whose from Wilmette, fit the candidate profile the researchers were looking for for the fellowship, which he began in September.

“He is an excellent communicator and a clear writer who demonstrates a strong aptitude toward computer-based modeling. His background in mechanics and materials science along with his computer skills make him a great fit for a large variety of research projects,” Karpov said. “John is one of the most remarkable students I have ever advised. He is a talented researcher with huge potential to discover. He has demonstrated a great attention to detail, a focused and goal-oriented mindset, and he possesses an excellent ability to adapt to new environments and create new ideas.”

As a fellow, Klein receives a monthly stipend of a more than $5,000, in addition to funding for travel to the USARL facility in Maryland and to a conference. Apart from learning from others, the traveling provides opportunities to network with researchers and meet personnel who can serve as resources in his efforts moving forward. The award is renewable for a second and third year.

He continues to work under the direction of Karpov in the professor’s Advanced Materials Laboratory at UIC.

“The specific research I am working on is within the scope of mechanical metamaterials,” Klein said. “A metamaterial has physical properties that are not seen in traditional materials. The behavior is outside of the realm of normal materials. These unusual properties could be related to how the material interacts with light, sound or forces.”

“Applications of metamaterials seem like science fiction. For instance, optical metamaterials are able to cloak objects from light — think Harry Potter invisibility cloak. In acoustics, the same principle applies; you can hide objects from sound if you cloak it with an acoustic metamaterial. The sound or light passes through the object as if it is not even there,” he added.

Additionally, one of the UIC researchers’ main objectives is to understand how they can control the way a surface load propagates through the interior when it is pushed.

To address this question, they are developing a new class of mechanical metamaterials that manipulate the internal energy distribution and stress profile in response to surface loads.

“In our materials, we demonstrate it is possible to deflect along a path and sometimes block at the surface certain types of loading patterns,” Klein said. “From a military standpoint, applications may include advanced armor systems, which would prevent certain loads from penetrating or structural systems, which when subject to certain load patterns are able to deflect them along a predefined path. The underlying objective of the Weapons & Materials Directorate within the USARL is to enhance the war power capabilities of the soldier, whether that be advanced protection or weapons systems. I like to think I am contributing to the former rather than the latter.”

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