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Skip to Search Results- 1Adaptive infrared camouflage
- 1Adaptive visible camouflage
- 1Alumina ceramic
- 1Atomic voids
- 1Brittle failure
- 1Camouflage
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2016
Petel, Oren E., Hogan, James D.
In the present study, ejecta dynamics techniques are used to investigate the ballistic response of shear thickening particle suspensions as a means of assessing the particle hardness and the role of interparticle friction during penetration. Through particle material variations, the role of...
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Design of micro- and macro-scale polymeric metamaterial solutions for passive and active thermal camouflaging applications
Download2023-04-01
Pisavadia, Harshil, Asad, Asad, Sameoto, Dan, Dolez, Patricia, Hogan, James D.
This work utilizes predictive modeling techniques to guide and inform metamaterial design for heat management solutions and thermal radiation control. Specifically, micro- and macro-scale polyethylene-based solutions are proposed for passive and active thermal camouflage. A micro-scale post...
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Hybrid Finite-Discrete Element Modeling of the Mode I Tensile Response of an Alumina Ceramic
Download2023-03-13
Zheng, Jie, Li, Haoyang, Hogan, James D.
We have developed a three-dimensional hybrid finite-discrete element model to investigate the mode I tensile opening failure of alumina ceramic. This model implicitly considers the flaw system in the material and explicitly shows the macroscopic failure patterns. A single main crack perpendicular...
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Investigating mechanisms of laser pulse-induced reflectivity modulations in photoacoustic remote sensing with a 10 million frames-per-second camera
Download2023-03-07
Haven, Nathaniel J. M., Martell, Matthew T., Li, Haoyang, Hogan, James D., Zemp, Roger J.
Photoacoustic remote sensing has been recently developed as an all-optical imaging modality capable of imaging a variety of endogenous contrast agents label-free. Initially predicted laser pulse-induced refractive index perturbation-based interrogation beam reflectivity modulations have been...
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Low-Cost and High-Speed Fabrication of Camouflage-Enabling Microfluidic Devices using Ultrahigh Molecular Weight Polyethylene
Download2023-08-25
Sun, Xiaoruo, Asad, Asad, Ali, Mehnab, Morita, Luka, Dolez, Patricia I., Hogan, James D., Sameoto, Dan
This study demonstrates a multi-spectrum camouflage control via microfluidic methods within a thermally and visibly semi-transparent polymer (polyethylene). Microfluidic devices have a high potential for achieving multiband camouflage including both visible and infrared (IR) spectrums because...
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Molecular Dynamics Simulations Correlating Mechanical Property Changes of Alumina with Atomic Voids under Triaxial Tension Loading
Download2023-05-01
Chang, Junhao, Chen, Zengtao, Hogan, James D.
The functionalization of nanoporous ceramics for applications in healthcare and defence necessitates the study of the effects of geometric structures on their fundamental mechanical properties. However, there is a lack of research on their stiffness and fracture strength along diverse directions...
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Smart Textiles for Visible and IR Camouflage Application: State-of-the-Art and Microfabrication Path Forward
Download2021-06-30
Degenstein, Lauren M., Sameoto, Dan, Hogan, James D., Asad, Asad, Dolez, Patricia I.
Protective textiles used for military applications must fulfill a variety of functional requirements, including durability, resistance to environmental conditions and ballistic threats, all while being comfortable and lightweight. In addition, these textiles must provide camouflage and...
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The effects of defects on the uniaxial compressive strength and failure of an advanced ceramic
Download2016
Ramesh, K., Farbaniec, Lukasz, Hogan, James D., Sano, Tomoko, Shaeffer, Matthew
This study investigates the effects of the processing-induced defect population on the dynamic compressive strength and failure of a hot-pressed boron carbide. Quantitative microscopic analysis was used to determine the distributions of three types of processing-induced inhomogeneities: aluminum...