Kink bands in rocks.

Rotation of the Crystal Lattice in Kink Bands, Deformation Bands, and Twin Lamellae of Strained Crystals.

search under grant NSF G-10236 administered by The University of Texas; to the Royal Department of Mines, Thailand, for their support of the research in Thailand, to Charles Mann and Gaylord Walker of the United States Operations Mission to Cambodia, and to Edmond Saurin and Adrien Milli6s-Lacroix, University of Saigon, for cooperation in Cambodia and Viet Nam, and to others. too numerous to na...

On the nucleation and growth of kink and shear bands.

Similarities and differences between the phenomena of kink banding in compressed layered structures and shear banding in compressed granular media are explored. Simple models are introduced for both, and the focus is directed onto how they can nucleate from the perfectly flat state. A convincing scenario is found for each in which a mode develops from an initial bifurcation into a periodic stat...

Optical kinks and kink-kink and kink-pulse interactions in resonant two-level media

An optical kink is a shock-wave-like field structure which can appear in a resonant two-level medium as a result of the nonlinear process of self-steepening. We numerically simulate this process using an adiabatically switching waveform as an input and confirm the self-similarity of resulting kinks. The analysis is also applicable to a more general waveform with a decaying trailing edge which w...

Eigenvalue method for computing size effect of cohesive cracks with residual stress, with application to kink-bands in composites

The previously developed eigenvalue method for computing the size effect of cohesive crack model is extended to the cohesive crack model with a finite residual stress. In this model, the structure size for which a specified relative length of kink-band corresponds to the maximum load is obtained as an eigenvalue of a homogeneous Fredholm integral equation. This new method is direct and much mor...

Kink Drift in Oscillating Fields.