ELFT HÍRADÓ

[Zsolt Kovacs <kovacszs AT caesar.elte.hu>]

ELTE Fizikai Intézet, Anyagfizikai Tanszék TANSZÉKI SZEMINÁRIUM !!!! 
Figyelem, rendkívüli alkalom a szokásostól eltérő időpontban !!!! 2018. 
június 5., kedd, 13:00-kor ELTE, Pázmány Péter sétány 1/A alatti 
épületében, 4.52 (Sas Elemér) teremben Stefanos Papanikolaou (Dept. of 
Mech. & Aerospace Eng., West Virginia University) Noise in nanoscale 
crystal plasticity: What can we learn from it?
Rare, abrupt events are common in plastically deforming crystals at 
small  scales. Despite the spatial self-averaging of large samples, 
these abrupt  events may control the behavior of sub-micron 
representative volumes in  multiscale modeling or in delicate mechanical 
probes such as nanoindentation.  The very origin of abrupt events is the 
presence of quenched disorder: either in the form of inclusions or 
parent dislocation configurations. In this talk, I will discuss various 
properties of these strain bursts in  minimal modelling of nanopillar 
compression (rate effects and ensemble average behaviors) and then, I 
will discuss the form of the parent quenched  disorder distributions 
that typically originate in prior mechanical processing, and their role 
in the compressive yield mechanical properties.  Finally, I will discuss 
possible ways of inferring the quenched disorder  distributions directly 
from the analysis of the noisy response.   Minden érdeklődőt szívesen 
várunk. A szemeszter szemináriumainak programja megtalálható a 
http://metal.elte.hu honlapon a Szemináriumok címszó alatt Kovács Zsolt