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DTSTAMP:20210916T132530Z
LOCATION:Michel Mayor
DTSTART;TZID=Europe/Stockholm:20210707T140000
DTEND;TZID=Europe/Stockholm:20210707T160000
UID:submissions.pasc-conference.org_PASC21_sess150@linklings.com
SUMMARY:Multiscale Modeling of Materials, Part II
DESCRIPTION:Minisymposium\n\nThis mini-symposium will focus on the tools a
 nd the models required to accurately model material behavior under various
  mechanical stimuli.  Continuum-scale models traditionally have difficulty
  accounting for specific mesoscale deformation behavior due to the larger 
 length scales (tens to hundreds of microns) at which these models are appl
 icable.  Accurately modeling fracture in higher length scale models is lim
 ited in similar ways; the sub-scale features of interest such as cracks an
 d/or voids, and their interactions along boundaries cannot be resolved. Fu
 rthermore, when complex and extreme loading conditions are considered, the
  active deformation mechanisms can change, impacting overall material stre
 ngth and damage evolution. Hence, the current state of the art models, par
 ticularly those active at larger length scales, cannot accurately predict 
 material behavior especially under dynamic loading conditions. To get arou
 nd these issues, many multiscale approaches have been developed in which i
 nformation is ‘passed’ from lower length scales up to higher length scales
 .  While this approach is reasonable, what information is needed, how diff
 erent models on different length scales connect, and the fidelity of these
  connections is still not clear.  This symposium is aimed at addressing th
 ese issues by bringing together modelers who have been working on modeling
  materials across scales.\n\nMicromechanics of Ductile Damage in a Non-Sch
 mid Material\n\nBronkhorst, Cho, Anghel, Marcy, Vander Wiel...\n\nAccurate
 ly representing the process of porosity-based ductile damage in polycrysta
 lline metallic materials via computational simulations remains a significa
 nt challenge. The heterogeneity of deformation in this class of materials 
 due to the anisotropy of deformation creates the conditions for the fo...\
 n\n---------------------\nSimulations of Material Response Using Crystal-M
 echanics and Porosity-Mechanics Based Modeling\n\nBarton\n\nWe present res
 ults from a computational investigation of microstructural effects on fail
 ure of ductile polycrystalline metals. The computational model makes use o
 f a crystal mechanics based constitutive model that includes porosity evol
 ution. The formulation includes nucleation behavior that is full...\n\n---
 ------------------\nDynamic Crystal Plasticity Modeling of Single Crystal 
 Tantalum and Validation Using Taylor Cylinder Impact Tests\n\nNguyen, Fens
 in, Luscher\n\nWe have significantly extended a previous dislocation-densi
 ty based constitutive theory to enable modeling the strong influence of te
 mperature and strain rate on the thermomechanical behavior of single cryst
 al body centered cubic (BCC) tantalum. The extension includes an expressio
 n of saturation dis...\n\n---------------------\nDislocation Drag in Metal
 s and its Effect on Material Response\n\nBlaschke\n\nThe mobility of dislo
 cations is an important factor in understanding material strength. Disloca
 tions experience a drag due to their interaction with the crystal structur
 e, the dominating contribution at high stress and temperature being the sc
 attering off phonons due to phonon wind. Yet, the functio...\n\n\nDomain: 
 CS and Math, Chemistry and Materials, Physics, Engineering
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