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Search Publications by: Michael A. Riley (Fed)

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Displaying 1 - 25 of 93

Redundant Ballistic Chronograph Configuration for Body Armor Testing

July 28, 2023
Author(s)
Michael A. Riley, Nicholas G. Paulter Jr., Dwight D. Barry
A new configuration of the light screen pairs used in a redundant ballistic chronograph is described. This configuration complies with current ASTM International and National Institute of Justice requirements for measuring the ballistic performance of body

Disinfection of Respirators with Ultraviolet Radiation

March 25, 2022
Author(s)
Dianne L. Poster, Matthew Hardwick, C Cameron Miller, Michael A. Riley, W. W. Shanaka I. Rodrigo, Andras E. Vladar, John D. Wright, Christopher D. Zangmeister, Clarence Zarobila, Jeremy Starkweather, John Wynne, Jason Yilzarde
Data for interpreting virus inactivation on N95 face filtering respirators (FFRs) by ultraviolet (UV) radiation are important in developing UV strategies for N95 FFR disinfection and reuse for any situation, whether it be everyday practices, contingency

Pruning the Mechanical Impedance of Three-Dimensional Disordered Networks

February 21, 2022
Author(s)
Marcos Reyes-Martinez, Edwin P. Chan, Christopher Soles, Michael A. Riley, Endao Han, Nidhi Pashine, Kieran Murphy, Heinrich Jaeger, Sidney Nagel, Daniel Reid, Meng Shen, Juan J. de Pablo
Disordered networks, comprised of random arrangements of bonds and nodes, have emerged as materials with the unique ability for independent control over the shear and bulk moduli. Recent computational studies have demonstrated that an extremely high degree

Wind-Tunnel Model Scale and Estimates of Wind Effects on Low-Rise Buildings

October 12, 2021
Author(s)
Michael A. Riley, Emil Simiu
Although the wind load provisions of many modern building codes are based on the results of wind tunnel testing, some effects of model scale and pressure tap quantity are still not well understood. Using test data obtained at two different scales for a low

Stress and Strain Heuristics for a Layered Elastomeric Foam at Medium Impact Rates

September 14, 2020
Author(s)
Alexander Landauer, Jared C. Van Blitterswyk, Michael A. Riley, Aaron M. Forster
Impact mitigating materials (IMMs) are used to reduce injury or damage due to a blunt impact, which often occurs at high rates or energies. Innovation in IMMs and designs strategies are required for the development of safer protective equipment. A key

Linking Theory to Practice: Predicting Ballistic Performance from Mechanical Properties of Aged Body Armor

August 24, 2020
Author(s)
Amanda L. Forster, Dennis D. Leber, Amy E. Engelbrecht-Wiggans, Virginie A. Landais, Allen Chang, Emilien J. Guigues, Guillaume Messin, Michael A. Riley
It has long been a goal of the body armor testing community to establish an individualized, scientific-based protocol for predicting end-of-life of fielded body armor ballistic performance. A major obstacle in achieving this goal is that the test methods

Metrologies for Performance of Impact Mitigating Materials

June 12, 2017
Author(s)
Aaron M. Forster, Michael A. Riley
Soft non-linear materials are used to mitigate energy transfer between objects during high rate or frequency events. These impact mitigating materials (IMM) are used in a wide range of applications such as isolating rotating equipment, protecting buildings

Development of Database-Assisted Design for Wind Loads: Current and Future Research

February 19, 2017
Author(s)
Emil Simiu, Fahim H. Sadek, S M. Diniz, Michael A. Riley, S Jang, L W. Lu
Following Irminger s 1894 aerodynamic tests, Flachsbart s pioneering boundary-layer wind tunnel experiments in 1932, and University of Western Ontario (UWO) 1970 s tests, considerable progress has been achieved in low-rise building design for wind. Owing

Results of Shear Resistance Tests of Manufactures House Walls

February 19, 2017
Author(s)
Michael A. Riley, R E. Vega
The tests reported herein were intended to gain information on how manufactured home shear walls perform under extreme loads. The specimens tested represent sections from a typical manufactured home. The test results will be used for analytical modeling