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BEGIN:VEVENT

CATEGORIES:Lectures/Conferences
CATEGORIES:Utilities
CATEGORIES:Lecture/Talk
CATEGORIES:Main
CONTACT;X-BEDEWORK-UID=8a0183a7-83184018-0184-87170e31-00006277:Hinz\, Nic
 olle
CREATED:20230403T143250Z
DESCRIPTION:Existing metal additive manufacturing (AM) models\nhave diffic
 ulty handling the laser-metal interaction\nand associated boundary condit
 ions (BCs) that\nsignificantly influence part quality metrics\, such as\n
 defect and surface roughness. This talk presents a\nsharp-diffusive inter
 face computational method\nfor simulating multiphysics processes in metal
  AM\,\nfocusing on better handling gas-metal interface\,\nwhere metal AM 
 physics mainly takes place. The\nframework consists of two components. Th
 e first is\na mixed interface-capturing/interface tracking\nmethod to exp
 licitly track the gas-metal interface\ntopological changes without mesh m
 otion or\nremeshing. The second is an enriched immersed\nboundary method 
 (EIBM) to impose the critical\nflow\, heat\, and phase transition Neumann
  BCs\,\nwhich are enforced in a smeared manner in current\nAM models\, on
  the gas-metal interface with strong\nproperty discontinuity.\nI will dem
 onstrate how the developed model\nelucidates the fundamental metal AM phy
 sics (e.g.\,\nmelt pool dynamics\, keyhole instability\, and\npowder spat
 tering) and predicts critical part\nquality-related quantities (e.g.\, de
 fect and surface\nroughness). The proposed framework's accuracy is\nasses
 sed by thoroughly comparing the simulated\nresults against experimental m
 easurements from\nNIST and Argonne National Laboratory using insitu\nhigh
 -speed\, high-energy x-ray imaging. I will\nalso report other important q
 uantities that\nexperiments cannot measure to show the\nframework's predi
 ctive capability.
DURATION:PT1H
DTSTAMP:20230403T143250Z
DTSTART;TZID=America/New_York:20230407T120000
LAST-MODIFIED:20230403T143250Z
LOCATION;X-BEDEWORK-UID=18832edc-1b27e154-011b-2825f3ad-0000002f:Fitzpatri
 ck Center Schiciano Auditorium Side B\, room 1466
STATUS:CONFIRMED
SUMMARY:CEE Seminar - Computational multi-physics for metal additive manuf
 acturing: methods and applications
UID:CAL-8a0182b3-870a191e-0187-4788f59b-00000641demobedework@mysite.edu
URL:http://cee.duke.edu
X-BEDEWORK-ALIAS;X-BEDEWORK-PARAM-DISPLAYNAME=Main:/user/public-user/Utili
 ties/Main
X-BEDEWORK-ALIAS;X-BEDEWORK-PARAM-DISPLAYNAME=Lecture_Talk:/user/public-us
 er/Lectures_Conferences/Lecture_Talk
X-BEDEWORK-SPEAKER:Jinhui Yan\,Assistant Professor University of Illinois 
 Urbana-Champaign
X-BEDEWORK-DUKE-SERIES:CEE Spring Seminar Series 2023
X-BEDEWORK-SUBMITTEDBY:nh143 for Civil and Environmental Engineering (CEE)
  (agrp_PrattSchool_CEE)
END:VEVENT
END:VCALENDAR