BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Using Simulation for Additive Manufacturing Designing and Process 
 Simulation - Dr Claus Pedersen\, Dassault Systèmes Deutschland
DTSTART:20171124T140000Z
DTEND:20171124T150000Z
UID:TALK83951@talks.cam.ac.uk
CONTACT:Hilde Hambro
DESCRIPTION:The current work presents the latest industrial simulation sol
 utions and workflows applied for Additive Manufacturing (AM) process simul
 ation and designing with a special focus on topology and sizing optimizati
 on.\n\nThe latest developments obtained by integrating adjoint sensitiviti
 es into a general non-linear FE-solver will be shown on AM applications fo
 r topology and non-parametric sizing optimization. It is demonstrated that
  realistic simulation including pre-loading of the assemble process\, stif
 fness of the bolt connections and contacts can be included for obtaining r
 ealistic AM optimization results. Additionally\, we consider an additive m
 anufacturing constraint for topology optimization in the form of an overha
 nging constraint. Commonly\, the present geometrical constraint is combine
 d with various objective functions and constraints typically applied in in
 dustrial applications as minimizing mass with stiffness\, strength and mod
 al eigenfrequency requirements. Lately sizing optimization using the adjoi
 nt sensitivities for design responses of finite element results including 
 modeling non-linearities for shell elements is implemented. To the best of
  our knowledge\, this is the first work which shows results for non-linear
  sizing of shell thicknesses using adjoint sensitivities including simulta
 neously the three modeling non-linearities as large deformations\, plastic
 ity as material non-linearity and contact.\n\nWith continuous growth in th
 e AM machines\, faster processes and diverse materials\, it is critical fo
 r companies investing in AM manufacturing to justify their investment by t
 aking structural designs fast to production without doing a lot of expensi
 ve trial-and-error manufacturing adjustments. The produced AM parts needs 
 to meet tolerance\, performance and durability requirements. Thus\, we pre
 sent a highly customizable general simulation framework for a wide spectru
 m of AM processes based on a thermal-stress general purpose finite element
  code for eliminating trial-and-error manufacturing adjustments as well as
  ensuring that produced AM parts needs meet tolerance\, performance and du
 rability requirements. The present AM simulation framework allows for: arb
 itrary meshes of CAD representations\; exact specification in time and spa
 ce of machine tooling (e.g.\, powder addition\, laser trajectories\, dwell
  times\, etc.) as would be used on an actual machine\; precise tracking of
  the progressive raw material addition to each element in the mesh via com
 plex geometric computations\; precise integration of the moving energy sou
 rces (e.g.\, laser\, electron beams\, arc welds\, high temperature polymer
  extrusion)\; automatic computation of the continuously evolving convectio
 n and radiation surfaces\, and simulation of a wide spectrum of AM process
 es such as laser and electron beam powder bed fabrication\, direct energy 
 deposition\, arc welding\, polymer extrusion\, ink jetting\, etc.\nSeveral
  industrial applications and benchmarks from the aerospace\, automotive an
 d consumer goods industry will be shown.
LOCATION:Oatley Seminar Room\, Department of Engineering
END:VEVENT
END:VCALENDAR