Search
Skip to Search Results- 4Brittle failure
- 2Advanced ceramics
- 2Boron carbide
- 2Compressive fragmentation
- 2Dynamic fragmentation
- 2Experimental mechanics
-
2015
Stickle, Angela, Hogan, James, Kimberley, Jamie, Ramesh, K.T.
Modeling of catastrophic disruption requires understanding the processes of dynamic failure and fragmentation. This paper summarizes current mechanisms and models for dynamic failure, strength, and fragmentation, reviewing these from a mechanics perspective and with an emphasis on making links to...
-
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...
-
Dynamic Behavior of an Ordinary Chondrite: the Effects of Microstructure on Strength, Failure and Fragmentation
Download2015
Plescia, Jeffrey, Ramesh, K.T., Hogan, James, Kimberley, Jamie, Hazeli, Kavan
Knowledge of the relationships between microstructure, stress-state and failure mechanisms is important in the development and validation of numerical models simulating large-scale impact events. In this study, we investigate the effects of microstructural constituent phases and defects on the...
-
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...
-
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...
-
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...
-
The Effects of Microstructure and Confinement on the Compressive Fragmentation of an Advanced Ceramic
Download2014
Farbaniec, Lukasz, Shaeffer, Matt, Ramesh, K.T., Hogan, James
We investigate the rate-dependent compressive failure and fragmentation of a hot-pressed boron carbide, under both uniaxial and confined biaxial compression, using quantitative fragment analysis coupled with quantitative microstructural analysis. Two distinct fragmentation regimes are observed,...