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Non-uniform crystallinity and temperature distribution during adjacent laser-assisted tape winding process of carbon/PA12 pipes

 
: Amin Hosseini, S.M.; Schäkel, Martin; Baran, Ismet; Janssen, Henning; Drongelen, Martin van; Akkerman, Remko

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Volltext ()

The International Journal of Advanced Manufacturing Technology 111 (2020), Nr.11-12, S.3063-3082
ISSN: 0268-3768
ISSN: 1433-3015
European Commission EC
H2020; 678875; ambliFibre
adaptive model-based Control for laser-assisted Fibre-reinforced tape winding
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IPT ()
Prepreg; crystallinity; numerical analysis; process monitoring; laser-assisted tape winding

Abstract
The non-uniform temperature and crystallinity distributions present in carbon fiber-reinforced PA12 composite pipes, produced via laser-assisted tape winding (LATW), are investigated in this paper. The width of the laser source is usually larger than the substrate width which causes multiple heating and cooling of some regions of the (neighboring) substrate and hence temperature and crystallinity gradients during the adjacent hoop winding. A kinematic-optical-thermal (KOT) model coupled with a non-isothermal crystallinity model is developed to capture the transient temperature and crystallinity distributions for growing substrate thickness and width. The predicted temperature trends are validated with thermocouple and thermal camera measurements. The substrate temperature varies in the width direction up to 52%. This will lead to extra polymer remelting and possible degradation. The maximum variation of the crystallinity degree across the width is found to be 270% which shows agreement with the trend of the measured crystallinity degree. It is found that a more realistic description of the melting behavior of the matrix is needed to obtain a more accurate prediction of the crystallinity distribution.

: http://publica.fraunhofer.de/dokumente/N-615856.html