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- 5Boron carbide
- 5Microstructure
- 4Brittle failure
- 4Nickel
- 3Compressive strength
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Quantification of damage and its effects on the compressive strength of an advanced ceramic
Download2019-01-03
Krimsky, Erez, Ramesh, K.T., Bratcher, M., Foster, M., Hogan, James D.
An understanding of the dynamic failure of damaged ceramics is important in protection applications, where the interaction of the projectile with cracked material is a contributing factor in the overall system performance. In this paper, we investigate the effects of pre-existing internal cracks...
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Quasi-static confined uniaxial compaction of granular alumina and boron carbide observing the particle size effects
Download2019-10-25
Nicewicz, Piotr, Peciar, Peter, Macho, Oliver, Sano, Tomoko, Hogan, James D.
The quasi-static confined uniaxial compaction of granular alumina and boron carbide was studied, and the effect of triaxial stress on the materials as a function of increasing particle size was observed. The average particle sizes studied for granular alumina were 170 ± 63, 230 ± 55, 330 ± 67,...
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Strain-Rate-Dependent mechanical behavior of a non-Equimolar CoCrFeMnNi high entropy alloy with a segmented coarse grain structure
Download2022-03-01
Li, Haoyan, Shao, Chenwei, Orhan, Okan K., Rojas, David Funes, Ponga, Maricio, Hogan, James D.
The mechanical response of a Co11.3Cr20.4Fe22.6Mn21.8Ni23.9 (wt%) high entropy alloy with a segmented coarse grain structure is investigated using strain-rate-dependent uniaxial compression experiments. The composition is verified using ab-initio simulations by examining thermal stability through...
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The mechanical response of a α2 (Ti3Al)+ γ (TiAl)-submicron grained Al2O3 cermet under dynamic compression: Modeling and experiment.
Download2019-01-01
Amirian, B., Li, H.Y., Hogan, James D.
Novel experimental data, obtained using an advanced digital image correlation technique coupled to ultra-high-speed photography, have been used to develop and validate a microstructure-dependent constitutive model for a α2(Ti3Al) + γ(TiAl)-submicron grained Al2O3 cermet. Utilizing experimental...
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Thermodynamically-consistent derivation and computation of twinning and fracture in brittle materials by means of phase-field approaches in the finite element method
Download2022-10-01
Amirian, Benhour, Jafarzadeh, Hossein, Abali, Bilen Emek, Reali, Alessandro, Hogan, James D.
A theoretical-computational framework is proposed for predicting the failure behavior of two anisotropic brittle materials, namely, single crystal magnesium and boron carbide. Constitutive equations are derived, in both small and large deformations, by using thermodynamics in order to establish a...
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Towards optimization of thickness, hardness, and porosity of low-pressure cold sprayed WC-Ni coatings.
Download2021-01-01
Jibran, Wania, Hogan, James D., McDonald, André
In this study, a 33 full factorial design methodology was used to analyze the effects of spray parameters on the thickness, hardness, and surface porosity of low-pressure cold-sprayed WC-17Ni coatings. Three levels were selected for the spray parameters included in the design which were the...
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2020-01-01
Hurley, Ryan C., Hogan, James D.
The Army Research Office funded an invitation-only workshop entitled “Identifying Mathematical Challenges Associated with Failure of Brittle Materials” at the Johns Hopkins University, Maryland on May 20–21, 2019. The workshop brought together mathematicians, statisticians, and mechanics of...