[Dottorcomp] Avviso di seminario 8/6/2021 - Dipartimento di Ingegneria Civile e Architettura

Mar 1 Giu 2021 12:02:50 CEST

Buongiorno a tutt*,

Ricevo e inoltro l'avviso di seminario qui sotto

Cordiali saluti,
Lorenzo Tamellini

---------- Forwarded message ---------
Da: Sonia Padovan <sonia.padovan a unipv.it>
Date: lun 31 mag 2021 alle ore 16:50
Subject: Invited Lectures on M&S for AM: Prof. Julia Mergheim (08/06/2021)
To: Sonia Padovan <sonia.padovan a unipv.it>

Carissimi,

condivido con voi l'annuncio del secondo evento della serie di
"*Invited Lectures on
Modeling and Simulation for Additive Manufacturing*" organizzate dal gruppo
di Meccanica Computazionale e Materiali Avanzati
<https://compmech.unipv.it/>. Il secondo seminario avrà come
*invited speaker* la *Prof.ssa Julia Mergheim* (Friedrich-Alexander-Universität
Erlangen-Nürnberg) e si terrà *martedì 8 giugno* alle *ore 11.00* in
modalità online:

*Zoom Meeting link*:
https://us02web.zoom.us/j/84764644341?pwd=a2FLM1Yzdk1oNHFVS1loS29OUXJBdz09
*Meeting ID: 847 6464 4341*
*Passcode: 301645*

*YouTube Live channel*:
https://www.youtube.com/channel/UCbuPu16F7DAuqSEX63agXyA

Sentitevi liberi di estendere l’invito a chiunque pensiate possa essere
interessato.

Cordiali saluti,

Sonia Padovan

*--*
*Sonia Padovan*
CompMech Group
Dept. Civil Engineering and Architecture
University of Pavia
Via Ferrata, 3 - 27100 Pavia, Italy
Phone  +39 0382 985463
E-mail  sonia.padovan a unipv.it
https://compmech.unipv.it/

*Invited Lectures on Modeling and Simulation for Additive Manufacturing :*
*Multiscale Simulation of Selective Beam Melting: Process – Mesostructure –
Properties*
*Invited Speaker: Prof. Julia Mergheim*
*Tuesday, June 8 @ 11:00 a.m. (CEST)* Zoom Meeting
https://us02web.zoom.us/j/84764644341?pwd=a2FLM1Yzdk1oNHFVS1loS29OUXJBdz09
<https://unipv.us1.list-manage.com/track/click?u=a3702953383182b6dd4674871&id=fe7463ad7a&e=aa961e0452>
*Meeting
ID*: 847 6464 4341
*Passcode*: *301645*

*YouTube Live Channel*
https://www.youtube.com/channel/UCbuPu16F7DAuqSEX63agXyA
[image: image.png]

Selective laser or electron beam melting are additive manufacturing
processes that start with a powder-bed and generate the desired part by
selectively melting the powder layer-by-layer. After solidification, the
solid part geometry is obtained. These additive manufacturing processes
make it possible to create various complex geometries, but can also produce
different material properties, depending on the process parameters.

In this presentation, a combination of simulation methods – macroscopic,
mesoscopic and numerical homogenization – will be presented to relate the
properties of the resulting material to the process strategy. A macroscopic
thermo-mechanical Finite Element (FE) process simulation is introduced and
thoroughly analyzed. The adaptive FE-solver is based on the open source FE
library deal.ii and makes use of heavy parallelization. A detailed
numerical analysis of various assumptions from the literature is performed.
The influences of a geometrically linear or nonlinear setting, stress
relaxation or the surrounding powder are examined. Furthermore,
recommendations for simulation parameters such as element type, mesh size
and time step size are given.
The simulated macroscopic temperature field is then used as input for a
cellular automaton to simulate the evolving grain structure. Examples for
Nickel alloys are given and validated by experimental results.
Finally, the macroscopic mechanical properties of the resulting grain
structure are derived by means of numerical homogenization, using a
gradient-enhanced crystal plasticity model on the mesoscopic scale.
Representative Volume Elements are constructed with the grain structure
output from the cellular automaton simulation. The macroscopic elastic and
plastic material behavior of a Nickel alloy are identified and validated by
experimental results.
Julia Mergheim is Professor for Applied Mechanics at the
Friedrich-Alexander-Universität Erlangen-Nürnberg. Her work focuses on
numerical mechanics, fracture and damage mechanics, material mechanics and
numerical homogenization, and simulation of additive manufacturing
processes.
Prof. Mergheim received her Diploma in Civil Engineering from the
Ruhr-University in Bochum in 2002 and her PhD in Mechanics from the
University of Kaiserslautern in 2005. She spent some time in industrial
research before returning to the University in Kaiserslautern as an
assistant professor in 2007. Since 2009, she has been researching and
teaching at the FAU Erlangen-Nürnberg. Prof. Mergheim is currently
supervising six PhD students and several Master students. She is principal
investigator in the Research Training Groups Fracture across Scales and
Energy Conversion Systems: From Materials to Devices and, since 2011, in
the Collaborative Research Center 814 Additive Manufacturing.
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