How to decipher fracture surfaces and crackling noise

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• Dr Laurent Ponson, CalTech
• Monday 19 January 2009, 14:30-15:00
• Oatley Seminar Room, Department of Engineering.

If you have a question about this talk, please contact Ms Helen Gardner.

Please note change of day, Monday

The roughness of cracks and their avalanche-like dynamics, also referred to as “crackling noise”, are signatures of the damage and fracture processes occurring during failure of materials. Deciphering their morphology or their structure is therefore of fundamental interest. Studying various materials under different external loading conditions, we show that they display surprisingly robust statistical properties, independent in a large extent of the material characteristics and the crack growth velocity. Tools issued from Statistical Physics enable to extend the continuum theory of Linear Elastic Fracture Mechanics to disordered media. This new theoretical framework is used to understand these observations.

This talk is part of the Engineering Department Bio- and Micromechanics Seminars series.

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