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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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2023-03-01
Shao, Chenwei, Li, Haoyang, Zhu, Yankun, Li, Peng, Yu, Haoyang, Zhang, Zhefeng, Gleiter, Herbert, McDonald, André, Hogan, James D.
Nanostructured materials are being actively developed, while it remains an open question how to rapidly scale them up to bulk engineering materials for broad industrial applications. This study propose an industrial approach to rapidly fabricate high-strength large-size nanostructured metal...
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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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High-velocity impact failure modeling of Armox 500T steel: Model validation and application to structural design
Download2023-01-01
Mao, Kyle, Toussaint, Geneviève, Komrakova, Alexandra, Hogan, James D.
As an advanced fracture model, the Generalized Incremental Stress State dependent damage MOdel (GISSMO) provides non-linear damage accumulation formulation to better predict ductile fracture initiation associated with a wider range of material stress states. In this study, we simulate the...
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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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A finite element-convolutional neural network model (FE-CNN) for stress field analysis around arbitrary inclusions
Download2023-11-01
Rezasefat, Mohammad, Hogan, James D.
This study presents a data-driven finite element-machine learning surrogate model for predicting the end-to-end full-field stress distribution and stress concentration around an arbitrary-shaped inclusion. This is important because the model’s capacity to handle large datasets, consider...
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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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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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2022-07-27
Amirian, Benhour, Jafarzadeh, Hossein, Abali, Bilen Emek, Reali, Alessandro, Hogan, James D.
Crack initiation and propagation as well as abrupt occurrence of twinning are challenging fracture problems where the transient phase-field approach is proven to be useful. Early-stage twinning growth and interactions are in focus herein for a magnesium single crystal at the nanometer...
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Mechanical and microstructural properties of a CoCrFe0. 75NiMo0. 3Nb0. 125 high-entropy alloy additively manufactured via cold-spray.
Download2022-02-10
Rojas, David Funes, Li, Haoyang, Orhan, Okan K., Shao, Chenwei, Hogan, James D., Ponga, Maricio
We present a combined experimental and computational investigation of the mechanical properties of a CoCrFe0.75NiMo0.3Nb0.125 (composition in molar ratio) high-entropy alloy additively manufactured via cold spray. We find that the sprayed alloy exhibits extraordinary mechanical properties under...