Journal Articles (Mechanical Engineering)

2018-01-01

Bhagavathula, Kapil Bharadwaj, Azar, Austin, Ouellet, Simon, Satapathy, Sikhanda, Dennison, Christopher R., Hogan, James D.

Polymeric foams are an essential part of personal protection equipment, such as helmets and body armor. In this work, the authors study the strain-rate dependent behavior of a dilatant polymeric foam, focusing on developing characterization and testing methodologies needed to better understand...

2021-06-01

Shao, Chenwei, Lo, Calvin, Bhagavathula, Kapil, McDonald, André, Hogan, James D.

Aluminum-alumina (Al–Al2O3) composites with ultrahigh strength were designed by combining dispersion strengthening via the addition of Al2O3 particles and matrix strengthening via in situ strain hardening. Cold spraying additive manufacturing technology was applied to fabricate the composites....

2023-01-01

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...

2023-04-01

Yang, Alex, Romanyk, Dan, Hogan, James D.

A numerical approach combining finite element modeling and machine learning is used to inform the material performance of an alumina ceramic tile undergoing high-velocity impact. In this study, the alumina ceramic tile is simulated by incorporating a user-defined Johnson–Holmquist–Beissel (JHB)...

2023-03-13

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...

2018-01-01

Motamedi, Pouyan, Bosnick, Ken, Cadien, Ken, Hogan, James D.

Ultrathin metal films have a wide variety of applications, especially in microelectronics. A key method to deposit these films is plasma-enhanced atomic layer deposition (PEALD), which is known for its ability to deposit thin films conformally and at relatively low temperatures. Building on the...

2021-05-01

Farbaniec, Lukasz, Chapman, David J., Patten, Jack R.W., Smith, Liam C., Hogan, James D., Rack, Alexander, Eakins, Daniel

The relationship between the dynamic mechanical properties of stony meteorites and their microstructures was investigated in-situ for an L-type ordinary chondrite using a split-Hopkinson pressure bar apparatus and ultra-high speed phase-contrast X-ray radiography at the European Synchrotron...

2023-03-07

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...

2023-08-25

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...

2022-02-10

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...