TY - GEN
T1 - Structural design optimization of short-fiber composite parts considering manufacturing aspects
AU - Schatz, Markus
AU - Baier, Horst
N1 - Publisher Copyright:
Copyright 2016 by Institute of Lightweight Structures. Published by the Society for the Advancement of Material and Process Engineering with permission.
PY - 2016
Y1 - 2016
N2 - Injection molding of short-fiber composite parts is recently gaining importance. This is reflected by the fact, that about eighteen percent of all carbon fibers are produced as short fibers, of which more than nine out of ten are processed by injection molding. However, designing short-fiber composite parts necessitates the consideration of both, mechanical as well as process aspects so as to yield an optimal structural performance. The latter aspect is especially challenging, since the molding process has for instance a strong imprint on the mechanical aspects through determination of fiber orientations. This marks the challenge addressed in this paper; namely, to set up a mathematically profound optimization framework, capable of simultaneously regarding mechanical and technical aspects. For this sake, a general optimization strategy, based on coupled structural and fluid simulations, is developed and discussed. Its numerical performance will be assessed based on the optimization of an industry relevant composite part; the engine bracket. Ultimately, the obtained optimal structures will be post-processed exploiting so-called shadow prices, allowing for instance an extrapolation of the objective value with respect to design critical requirements or extensive sensitivity studies with respect to the material parameters, together aggregating in elaboration advices indicating optimal design revisions.
AB - Injection molding of short-fiber composite parts is recently gaining importance. This is reflected by the fact, that about eighteen percent of all carbon fibers are produced as short fibers, of which more than nine out of ten are processed by injection molding. However, designing short-fiber composite parts necessitates the consideration of both, mechanical as well as process aspects so as to yield an optimal structural performance. The latter aspect is especially challenging, since the molding process has for instance a strong imprint on the mechanical aspects through determination of fiber orientations. This marks the challenge addressed in this paper; namely, to set up a mathematically profound optimization framework, capable of simultaneously regarding mechanical and technical aspects. For this sake, a general optimization strategy, based on coupled structural and fluid simulations, is developed and discussed. Its numerical performance will be assessed based on the optimization of an industry relevant composite part; the engine bracket. Ultimately, the obtained optimal structures will be post-processed exploiting so-called shadow prices, allowing for instance an extrapolation of the objective value with respect to design critical requirements or extensive sensitivity studies with respect to the material parameters, together aggregating in elaboration advices indicating optimal design revisions.
UR - http://www.scopus.com/inward/record.url?scp=84978052512&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84978052512
T3 - International SAMPE Technical Conference
BT - SAMPE Long Beach 2016 Conference and Exhibition
PB - Soc. for the Advancement of Material and Process Engineering
T2 - SAMPE Long Beach 2016 Conference and Exhibition
Y2 - 23 May 2016 through 26 May 2016
ER -