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UID:0-1171@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20250630T130000

DTEND;TZID=Asia/Jerusalem:20250630T140000

DTSTAMP:20250609T111024Z

URL:https://aerospace.technion.ac.il/events/mesoscopic-crystal-plasticity-
 and-more-modeling-computing-sensing-for-aerospace-applications/

SUMMARY:Mesoscopic crystal plasticity and more – modeling\, computing &am
 p\; sensing for aerospace applications
DESCRIPTION:Lecturer:Dr. Nathan Perchikov\n Faculty:Faculty of Mechanical E
 ngineering\n Institute:Technion – Israel Institute of Technology\n Locat
 ion:Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: https:
 //technion.zoom.us/j/93899557822\n Abstract: This seminar presents ongoing
  research dedicated to the development of physical models\, computational 
 methods and sensor concepts useful for aerospace materials and structures.
  It gives an overview of several sensing technologies designed to detect e
 .g. electrostatic-field nonuniformities\, hazardous gas concentrations\, m
 echanical motion/position-changes\, fatigue-related damage in metals\, flu
 id viscosity\, etc.\nThe outlined sensor concepts are designed based on dy
 namical systems theory\, multiphysical models and specialized numerical me
 thods for discrete- and continuum-mechanics problems — some examples bei
 ng finite-element and spectral solvers for PDEs\, order-reduction and moda
 l decomposition methods for ODEs\, etc.\nA detailed discussion is given on
  the recently developed automaton-form-based mesoscopic theory of crystal 
 plasticity. A hybrid smooth–nonsmooth formulation is introduced\, which 
 models plastic deformation as a quantized process\, enabling the numerical
  derivation of experimentally observed critical exponents. This approach a
 llows the simulation of intermittent plasticity with computational speedup
  of 1-2 orders of magnitude compared to previous formulations.\nWhile micr
 oscopic theories (e.g. DDD/CDD) resolve atomic-scale patterns in plastic d
 eformation of real crystalline materials\, they are computationally limite
 d to small\, sub-structural systems. Macroscopic theories\, in contrast\, 
 being computationally efficient for large-scale systems\, lack fundamental
  rigor\, often relying on phenomenology.\nThe proposed mesoscopic approach
  constitutes a viable trade off\, with potential applications in modeling 
 crystalline ice buildup on airplanes\, sensing fatigue-related damage in m
 etal engine parts/landing-gear components\, designing motion-detection dev
 ices based on controlled deformation in microcrystals\, etc. In addition\,
  the theory gives a coarse-graining methodology useful for high-performanc
 e computing of continua under rapid loading relevant e.g. for modeling of 
 bird strike on aircraft.\n Details: \n 
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Classroom 165\, ground floo
 r\, Library\, Aerospace Eng.\, Haifa\, ;X-APPLE-RADIUS=100;X-TITLE=:geo:0,
 0

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