Shear Localization and Comminution of Granular and Fragmented Silicon Carbide

Shear with comminution of a granular material: microscopic deformations outside the shear band.

A correlation imaging velocimetry technique is applied to recover displacement fields in a granular material subjected to extended shear. A thick (10 cm) annular sand sample (grain size: 1 mm) is confined at constant pressure (sigma=0.5 MPa) against a rough moving wall displacing at very low speed (delta=83 microm s(-1)). Localization of the strain rapidly forms a shear band (seven particles wi...

Silicon Nitride and Silicon Carbide

Observation of Shear Wave Generation at Bonded Silicon- Carbide Interface

The drive toward higher efficiencies and performance in energy production and transportation equipment has posed a continual challenge for the materials scientists and engineers involved in design and construction of such equipment. The laws of thermodynamics specify that increased efficiency can best be achieved by the use of the highest possible temperatures. As the desired operating temperat...

Sheared granular layers: Competition between flash heating and particle comminution

Quantitatively predicting the dynamic response and energy partition of granular fault gouges under shear remains a major challenge in seismology. Earthquake laboratory experiments are limited by capacity of equipments and thus cannot provide similar conditions in real earthquake ruptures. This motivates the development of computational models of granular fault gouge that accurately predict thei...

Shock-wave strength properties of boron carbide and silicon carbide