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2022-06-01

White, J.J., Holloway, G.L., Jeans, T.L.

It is known that a small concentration of polymer introduced to the boundary layer can produce significant drag reduction for liquid flows. This effect has been studied extensively for internal flow and polymer injection in external flow, though much is still unknown about the underlying...

2022-06-01

Wu, Jiuda, Yousefzadeh, Behrooz

Modulated materials are artificially structured materials with effective properties that vary periodically in time in response to an external stimulus. The time-dependent elastic properties of a modulated material enable them to exhibit vibration transmission characteristics that are not typical...

2022-06-01

Gkouti, Elli, Czekanski, Aleksander, Yenigun, Burak

Abstract—Viscoelastic materials are commonly used for engineering applications due to their unique and useful properties. Namely, when rubbers are subjected to deformation, then the stress response is not linear but increases or decreases similar to a hyperelastic material. Moreover, the...

2022-06-01

Trendov, Veronica, Barari, Ahmad, Abou Ziki, Jana D., Seyedi Sahebari, Seyed Mahmoud

Abstract—Spark Assisted Chemical Engraving (SACE) is a non-traditional micro-machining technology, with one of its unique characteristics being the physical distance relationship between the tool and workpiece during machining. Previous papers have illustrated that maintaining space between the...

2022-06-01

Gunther, K., Mann, S., Dumas, G., Oshkai, P.

A numerical and experimental comparison of a fully-passive oscillating-foil turbine operating in different confinement levels is conducted to assert how well CFD-based FSI simulations can predict the performances of the turbine. It is found the present 3D URANS simulations match reasonably well...

2022-06-01

Baral, Talaz, Afshari, Sajad Saraygord, Liang, Xihui

Fatigue-induced crack initiation and growth are common in cyclically loaded structures. Crack reduces the structures' strength and increases the risk of failure. Engineers have been using degradation models like Paris' law to relate crack length to the magnitude of the applied load to schedule...

2022-06-01

Zeidi, Mahdi, Kim, Chun Il, Park, Chul B.

In the present study, we investigate the roles of interface and interfiber interactions on the toughening and failure mechanisms of nanofibrillated rubber-toughened thermoplastic-based nanocomposites. Emphasis is placed on establishing a comprehensive theoretical and atomistic descriptions of the...

2022-06-01

Gupta, Arun, Singh, Hardial

Experimental and computational studies were carried out on the S-shaped diffusers to determine the impact of the change in curvature of a straight-wall diffuser. A straight diffuser became a curved diffuser at completely different angles as their similar upper and lower limbs (30°/30°, 45°/45°)....

2022-06-01

Bannigan, Niall, Orf, Leigh, Savory, Eric

Abstract—Tornados are a major hazard and ever-present threat in many regions, with the potential to cause wide-scale loss of life and damage to infrastructure. Many researchers have attempted to develop tornado simulation techniques that amount to vortex generation with the goal of understanding...

2022-06-01

Fathy, Jino, Krstic, Aleksa, Hubbard, Ted, Lai, Yongjun

This work demonstrates a novel multi-configurable three-state electrothermally-actuated microgripper. The state of the gripper refers to the electrical configuration of the hot and cold arms as well as the mechanical mode of operation. The gripper has three basic electrical configurations and...