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SUMMARY:Dynamic rupture behavior and friction evolution revealed by labora
 tory experiments using ultra high-speed digital image correlation - Prof V
 ito Rubino École Centrale de Nantes\, France
DTSTART:20240126T140000Z
DTEND:20240126T150000Z
UID:TALK205462@talks.cam.ac.uk
CONTACT:46601
DESCRIPTION:Shear cracks along interfaces are relevant to a broad class of
  engineering and geophysics applications\, ranging from the failure of com
 posite materials and bonded joints to earthquakes and landslides. Characte
 rizing the rheology of interfaces and faults is of paramount importance to
  improve our understanding of frictional ruptures\, as friction controls k
 ey processes of rupture nucleation\, propagation\, and arrest and influenc
 es various rupture outcomes\, for example how damaging earthquakes can be.
  In this presentation\, I will discuss recent advances in the characteriza
 tion of rupture behavior and friction evolution using our newly developed 
 imaging technique\, based on digital image correlation (DIC) coupled with 
 ultrahigh speed photography. One of the highlights of this new approach is
  its ability to experimentally capture the full-field evolution of particl
 e velocities and strains of spontaneously propagating dynamic ruptures at 
 a level of detail that until recently was possible to achieve only with nu
 merical simulations. Dynamic imaging of stresses enables us to decode the 
 nature of friction by tracking its evolution and studying its dependence o
 n slip\, slip velocity and their history. The measured friction behavior a
 llows us to challenge existing friction laws and formulate new ones. This 
 approach gives a new perspective on the study of friction and provides imp
 ortant insights into earthquake and rupture physics.
LOCATION:Oatley 1 Meeting Room\, Department of Engineering
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