BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Karel Tůma (Mathematical Institute\, Charles University) DTSTART:20220103T144000Z DTEND:20220103T161000Z DTSTAMP:20260405T174544Z UID:NSCM/48 DESCRIPTION:Title: Fi nite strain phase-field model for martensitic transformation: Large-scale finite element simulations\nby Karel Tůma (Mathematical Institute\, C harles University) as part of Nečas Seminar on Continuum Mechanics\n\n\nA bstract\nMartensitic transformation is a first-order solid-solid diffusion less transformation that occurs between the parent phase (austenite) and t he product phase (martensite) and is characterized by the microstructure e volution\, which is accompanied by the formation\, propagation\, and annih ilation of the interfaces. In shape memory alloys\, the microstructure evo lution is the mechanism behind the properties such as pseudoelasticity and shape memory effect. In general\, due to the incompatibility between aust enite and a single variant of martensite\, the martensitic transformation is realized via the formation of complex twinning microstructure. \nA rece ntly developed phase-field model for multivariant martensitic transformati on is implemented using the finite element method and used to compute larg e-scale simulations reaching 150 million degrees of freedom. The computat ional problems are quite expensive due to the fact that high mesh density is needed to capture the detailed microstructure\, see attached figure. Ou r implementation has shown robustness and good parallel scaling performanc e. Having this model\, the goal is to perform a systematic investigation o f the effect of crystal lattice orientation and material anisotropy on the indentation-induced microstructure evolution in CuAlNi shape memory alloy . To our knowledge\, such a comprehensive high-resolution microstructure-b ased modeling study has not been reported before. This is a joint work wit h M. Rezaee-Hajidehi\, S. Stupkiewicz\, J. Hron and P. Farrell.\n LOCATION:https://researchseminars.org/talk/NSCM/48/ END:VEVENT END:VCALENDAR