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Skip to Search Results- 7Brittle failure
- 6Digital image correlation
- 5Boron carbide
- 4Compressive strength
- 3Advanced ceramics
- 3Experimental mechanics
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2019-01-01
Amirian, B., Li, H.Y., Hogan, James D.
In this paper, a microstructure-based finite element model for nano-grained (!+↵2)-TiAl/Al2O3 cermets is proposed based on a modified variational formulation of the Gurson model for an elastic-plastic porous material. In the modeling approach, the high volume fraction of alumina, variability in...
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2016-01-01
Farbaniec, Lukasz, Hogan, James D., McCauley, James W., Ramesh, Kaliat T.
Effects of microstructure and material properties on the mechanical behavior of hot-pressed boron carbide are presented. The microstructure and intrinsic microstructural inhomogeneities have been characterized using scanning electron microscopy characterization techniques (SEM/EDS/EBSD). In-situ...
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2019-03-18
Li, H.Y., Motamedi, P., Hogan, James D.
This study investigates the micro/nanostructural features and mechanical responses of a novel TiAl/Ti3Al/Al2O3 cermet fabricated by self-propagation high-temperature synthesis. The microscopic diagnosis was used to examine the material composition, phase distribution, and elemental concentration...
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2017-01-01
Farbaniec, L., Hogan, James D., Xie, K.Y., Shaeffer, M., Hemker, K.J., Ramesh, K.T.
The dynamic response of hot-pressed boron carbide was studied under uniaxial and confined loading conditions using a modified compression Kolsky bar setup at strain rates of 102 – 103 s–1. The progression of damage in the prismatic specimens was captured using a high-speed camera. This...
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2020-07-01
Lo, Calvin, Sano, Tomoko, Hogan, James D.
We investigated the uniaxial compressive behavior of damaged and intact alumina using quantitative X-ray computed tomography (XCT) analysis coupled with digital image correlation (DIC) for mechanical characterization. Internal three-dimensional crack characteristics such as crack surface area and...
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2017-04-01
Hogan, James D., Farbaniec, Lukasz, Mallick, Debjoy, Domnich, Vladislav, Kuwelkar, Kanak, Sano, Tomoko, McCauley, James W., Ramesh, Kaliat T.
In this paper, the impact-induced fragmentation of a commercially available hot-pressed boron carbide is explored. Fragmentation has been noted previously by many authors to be important in the impact performance of advanced ceramics, and so this paper seeks to provide some of the first...
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Micro-hardness and strain-rate-dependent compressive response of an ultra-light-weight Mg-Li-Al alloy
Download2022-01-15
Li, Haoyang, Shao, Chenwei, Rojas, David Funes, Ponga, Mauricio, Hogan, James D.
A study on the microstructure and composition, micro-hardness and strain-rate-dependent compressive behaviors, and the associated failure mechanisms of an ultra-light-weight Mg-Li-Al alloy were conducted. X-ray diffraction and X-ray photoelectron spectroscopy showed a multi-phase material with...
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Micromechanisms Associated with the Dynamic Compressive Failure of Hot-Pressed Boron Carbide
Download2015
Ramesh, K.T., Farbaniec, Lukasz, Hogan, James
Brittle failure in boron carbide has been studied in dynamic uniaxial compression using a Kolsky bar technique. A detailed study of fragments was performed using SEM-EDS, to identify the mechanisms responsible for failure. Microstructural characterization and fracture surface observations...
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Microstructural and mechanical characterization of variability in porous advanced ceramics using X-ray computed tomography and digital image correlation.
Download2019-01-01
Lo, Calvin, Sano, Tomoko, Hogan, James D.
This paper explores microstructural and mechanical variability in porous ceramics, combining advanced X-ray computed tomography (XCT) and digital image correlation (DIC) techniques to characterize an alumina material. The results show low variability in microstructure, with median pore size...
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2016
Farbaniec, Lukasz, Daphalapurkar, Nitin, Ramesh, K.T., Hogan, James
Dynamic brittle fragmentation is typically described using analytical and computational approaches for tensile stress-states. However, most fragmentation applications (e.g., impact, blast) involve very large initial compressive stresses and deformations. In this study, the compressive...