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SUMMARY:Uncovering the Chemo-Mechanics of Fracture via Quantum Mechanics B
 ased Concurrent Multiscale Modelling
DTSTART:20130923T131500
DTSTAMP:20260916T203826Z
UID:9e14cafcaa71eda9b627af471eb60777209dce081eb5e62074dd0ea9
CATEGORIES:Conferences - Seminars
DESCRIPTION:Derek H. Warner\, Cornell University\nBio: Derek Warner is cur
 rently a Visiting Professor in the Computational Solid Mechanics Laborator
 y at EPFL. He is on sabbatical leave from his Associate Professor appointm
 ent in the School of Civil and Environmental Engineering at Cornell Univer
 sity. Prior to this he was a Postdoctoral Research Associate in the Divisi
 on of Engineering at Brown University\, where he worked in the Mechanics o
 f Solids Group. He completed his Ph.D. in Mechanical Engineering at Johns 
 Hopkins University in 2006. Derek’s overall research effort is aimed at 
 understanding the connection between microscopic physical phenomena and th
 e macroscopic deformation and failure of engineering materials by coupling
  cutting-edge computing technologies with state-of-the-art simulation tech
 niques.\nThe prediction of crack growth is one of the most technologically
  important and scientifically intriguing problems in mechanics of material
 s. Yet\, despite decades of research\, a comprehensive understanding of th
 e process has remained elusive. As a quintessential multiscale phenomenon\
 , crack growth is both a chemical and mechanical process\, involving inter
 atomic bond breakage driven by long range mechanical stress fields. Thanks
  to growing supercomputing resources and novel concurrent multiscale model
 ing techniques that can accurately couple quantum and continuum mechanics 
 modeling domains\, crack tip processes in real environments are just now b
 ecoming accessible to powerful quantum chemistry approaches such as Kohn S
 ham Density Functional Theory. The majority of our work in this area has b
 een focused on understanding how surface impurity elements influence the b
 ehavior of cracks in aluminum\, a material that serves as the base of many
  technologically important alloys whose fracture response is known to be a
 ffected by chemical environment. In this talk\, I will review our work on 
 this topic and use it to frame our ongoing work.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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