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SUMMARY:How to decipher fracture surfaces and crackling noise - Dr Laurent
  Ponson\, CalTech
DTSTART:20090119T143000Z
DTEND:20090119T150000Z
UID:TALK16102@talks.cam.ac.uk
CONTACT:Ms Helen Gardner
DESCRIPTION:The roughness of cracks and their avalanche-like dynamics\, al
 so referred to as “crackling noise”\, are signatures of the damage and
  fracture processes occurring during failure of materials. Deciphering the
 ir morphology or their structure is therefore of fundamental interest. Stu
 dying various materials under different external loading conditions\, we s
 how that they display surprisingly robust statistical properties\, indepen
 dent in a large extent of the material characteristics and the crack growt
 h velocity. Tools issued from Statistical Physics enable to extend the con
 tinuum theory of Linear Elastic Fracture Mechanics to disordered media. Th
 is new theoretical framework is used to understand these observations.
LOCATION:Oatley Seminar Room\, Department of Engineering
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