Details
| Original language | English |
|---|---|
| Article number | 109574 |
| Journal | Composites Science and Technology |
| Volume | 228 |
| Early online date | 26 Jun 2022 |
| Publication status | Published - 29 Sept 2022 |
| Externally published | Yes |
Abstract
Wet compression molding (WCM) provides high-volume production potential for continuously fiber-reinforced composite components with thermoset resins. Reduced cycle times are enabled by simultaneous infiltration, draping and consolidation within a single process step. During compression, the matrix is forced through the macroscopic stack and across its surface. This can cause undesired fiber displacements, which affect the structural performance of the processed part, as local fiber orientations can deviate from the intended one. Since already minor changes in fiber orientation can decrease the part performance, this process defect, often referred to as flow-induced fiber displacement (FiFD), should be avoided during processing. To prevent this, the WCM compression step is comprehensively evaluated by two experimental setups. First, systematic industrial-scale trials provide insight into the correlation between applied mold closing profile and resulting superficial FiFD on macro-scale. Second, a setup with transparent plates is applied to investigate the impact of superficial fluid at the stack surface on the obtained FiFD. Experimental results show positive correlations between velocity and viscosity of superficial fluid flow and observed FiFD. In this context, a more sophisticated closing amplitude of the press in combination with an adapted temperature control of the resin is proposed to minimize undesired fiber displacements.
Keywords
- Composite processing, Fluid induced fiber displacement (FiFD), FSI, Matlab, Mold filling, Non-crimped fabrics, Process control, Process development, Wet compression molding (WCM)
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- General Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Composites Science and Technology, Vol. 228, 109574, 29.09.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Flow-induced fiber displacement in non-bindered UD-NCF during Wet Compression Molding – Analysis and implications for process control
AU - Albrecht, Fabian
AU - Poppe, Christian
AU - Tiemann, Tim
AU - Sauerwein, Vladimir
AU - Rosenberg, Philipp
AU - Henning, Frank
N1 - Publisher Copyright: © 2022 Elsevier Ltd
PY - 2022/9/29
Y1 - 2022/9/29
N2 - Wet compression molding (WCM) provides high-volume production potential for continuously fiber-reinforced composite components with thermoset resins. Reduced cycle times are enabled by simultaneous infiltration, draping and consolidation within a single process step. During compression, the matrix is forced through the macroscopic stack and across its surface. This can cause undesired fiber displacements, which affect the structural performance of the processed part, as local fiber orientations can deviate from the intended one. Since already minor changes in fiber orientation can decrease the part performance, this process defect, often referred to as flow-induced fiber displacement (FiFD), should be avoided during processing. To prevent this, the WCM compression step is comprehensively evaluated by two experimental setups. First, systematic industrial-scale trials provide insight into the correlation between applied mold closing profile and resulting superficial FiFD on macro-scale. Second, a setup with transparent plates is applied to investigate the impact of superficial fluid at the stack surface on the obtained FiFD. Experimental results show positive correlations between velocity and viscosity of superficial fluid flow and observed FiFD. In this context, a more sophisticated closing amplitude of the press in combination with an adapted temperature control of the resin is proposed to minimize undesired fiber displacements.
AB - Wet compression molding (WCM) provides high-volume production potential for continuously fiber-reinforced composite components with thermoset resins. Reduced cycle times are enabled by simultaneous infiltration, draping and consolidation within a single process step. During compression, the matrix is forced through the macroscopic stack and across its surface. This can cause undesired fiber displacements, which affect the structural performance of the processed part, as local fiber orientations can deviate from the intended one. Since already minor changes in fiber orientation can decrease the part performance, this process defect, often referred to as flow-induced fiber displacement (FiFD), should be avoided during processing. To prevent this, the WCM compression step is comprehensively evaluated by two experimental setups. First, systematic industrial-scale trials provide insight into the correlation between applied mold closing profile and resulting superficial FiFD on macro-scale. Second, a setup with transparent plates is applied to investigate the impact of superficial fluid at the stack surface on the obtained FiFD. Experimental results show positive correlations between velocity and viscosity of superficial fluid flow and observed FiFD. In this context, a more sophisticated closing amplitude of the press in combination with an adapted temperature control of the resin is proposed to minimize undesired fiber displacements.
KW - Composite processing
KW - Fluid induced fiber displacement (FiFD)
KW - FSI
KW - Matlab
KW - Mold filling
KW - Non-crimped fabrics
KW - Process control
KW - Process development
KW - Wet compression molding (WCM)
UR - http://www.scopus.com/inward/record.url?scp=85134241440&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2022.109574
DO - 10.1016/j.compscitech.2022.109574
M3 - Article
AN - SCOPUS:85134241440
VL - 228
JO - Composites Science and Technology
JF - Composites Science and Technology
SN - 0266-3538
M1 - 109574
ER -