Anisotropic warpage prediction of injection molded parts with phenolic matrix

  • Injection Molding is one of the most important processes to manufacture short fiber reinforced composites. During mold filling the fibers orientate depending on the flow field. The final fiber orientation influences the thermo-mechanical behavior of the part. During the holding stage, the matrix solidifies from fluid to solid, having crucial impact on the mechanical attributes and causing thermal and chemical shrinkage. The combination of these effects leads to residual stresses and warpage of the injection molded part, which may lead to dysfunctionality and waste production. One strong tool to minimize warpage in an early stage of part design is process simulation. Based on a virtual prediction, tool correction cycles, dysfunctional parts and therefore costs and production energy can be reduced. However, such prediction models need adequate material and process modeling, accounting for the anisotropic and thermo-visco-elastic material behavior. This work presents an approach to modelInjection Molding is one of the most important processes to manufacture short fiber reinforced composites. During mold filling the fibers orientate depending on the flow field. The final fiber orientation influences the thermo-mechanical behavior of the part. During the holding stage, the matrix solidifies from fluid to solid, having crucial impact on the mechanical attributes and causing thermal and chemical shrinkage. The combination of these effects leads to residual stresses and warpage of the injection molded part, which may lead to dysfunctionality and waste production. One strong tool to minimize warpage in an early stage of part design is process simulation. Based on a virtual prediction, tool correction cycles, dysfunctional parts and therefore costs and production energy can be reduced. However, such prediction models need adequate material and process modeling, accounting for the anisotropic and thermo-visco-elastic material behavior. This work presents an approach to model warpage of short fiber reinforced phenolic parts, by a combination of a CHILE- approach for the matrix and orientation averaging of mean field homogenized properties to consider the fiber orientation. Fiber orientation, temperature and curing field are determined in a preceding mold filling simulation.show moreshow less

Download full text files

Export metadata

Statistics

Number of document requests

Additional Services

Share in Twitter Search Google Scholar
Metadaten
Author:Florian WittemannORCiD, Alexander BernathORCiD, Nils MeyerORCiDGND, Luise KärgerORCiD
URN:urn:nbn:de:bvb:384-opus4-1151762
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/115176
ISBN:978-2-912985-01-9OPAC
Parent Title (English):Proceedings of the 21st European Conference on Composite Materials, ECCM21, 2-5 July 2024, Nantes, France
Publisher:The European Society for Composite Materials (ESCM) and the Ecole Centrale de Nantes
Place of publication:Nantes
Editor:Christophe Binetruy, Frédéric Jacquemin
Type:Conference Proceeding
Language:English
Year of first Publication:2024
Publishing Institution:Universität Augsburg
Release Date:2024/09/05
Issue:volume 5
First Page:139
Last Page:145
DOI:https://doi.org/10.60691/yj56-np80
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Materials Resource Management
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Materials Resource Management / Juniorprofessur für Data-driven Product Engineering and Design
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Licence (German):CC-BY-NC 4.0: Creative Commons: Namensnennung - Nicht kommerziell (mit Print on Demand)