|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Multiscale modelling of brittle fracture in oxides and semiconductors
If you have a question about this talk, please contact Stephen Walley.
Fracture is one of the most challenging ‘multi-scale’ problems to model: since crack propagation is driven by the concentration of a long-range stress field at an atomically sharp crack tip, an accurate description of the chemical processes occurring in the small crack tip region is therefore essential, as is the inclusion of a much larger region in the model systems. Both these requirements can be met by combining a quantum mechanical description of the crack tip with a classical atomistic model that captures the long-range elastic behaviour of the surrounding crystal matrix. Examples of the application of these techniques to fracture problems include low-speed dynamical fracture instabilities in silicon, interactions between moving cracks and material defects such as dislocations or impurities, very slow crack propagation via kink formation and migration, and chemically activated fracture, where cracks advance under the concerted action of stress and corrosion by chemical species such as oxygen or water.
This talk is part of the Surfaces, Microstructure and Fracture Group series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsDAMTP Friday GR Seminar Economic and Social History Graduate Workshop British Cactus & Succulent Society (Cambridge Branch)
Other talksHow protein plasticity influences MHC class I peptide selection: insights into mechanism Neural mechanisms of spatial and episodic memory A Probabilistic Framework for Modeling Cross-Lingual Semantic Similarity (out of and in Context) Based on Latent Cross-Lingual Concepts Adaptive Codes for flexible behaviour in the human brain. Eisenstein's Ivan: Sensory Thinking from Machiavelli to Disney Bacterial autophagy and the cytoskeleton in host defence