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dc.contributor.authorMulle, Matthieu
dc.contributor.authorWafai, Husam
dc.contributor.authorYudhanto, Arief
dc.contributor.authorLubineau, Gilles
dc.contributor.authorYaldiz, R.
dc.contributor.authorSchijve, W.
dc.contributor.authorVerghese, N.
dc.date.accessioned2017-01-02T08:42:39Z
dc.date.available2017-01-02T08:42:39Z
dc.date.issued2015-12-29
dc.identifier.citationMulle M, Wafai H, Yudhanto A, Lubineau G, Yaldiz R, et al. (2016) Process monitoring of glass reinforced polypropylene laminates using fiber Bragg gratings. Composites Science and Technology 123: 143–150. Available: http://dx.doi.org/10.1016/j.compscitech.2015.12.020.
dc.identifier.issn0266-3538
dc.identifier.doi10.1016/j.compscitech.2015.12.020
dc.identifier.urihttp://hdl.handle.net/10754/622238
dc.description.abstractHot-press molding of glass-fiber-reinforced polypropylene (GFPP) laminates was monitored using longitudinally and transversely embedded fiber Bragg gratings (FBGs) at different locations in unidirectional laminates. The optical sensors proved to efficiently characterize some material properties; for example, strain variations could be related physical change of the laminate, revealing key transition points such as the onset of melt or solidification. These results were confirmed through some comparison with traditional techniques such as differential scanning calorimetry. After the GFPP plate was released from the mold, residual strains were estimated. Because cooling rate is an important process parameter in thermoplastics, affecting crystallinity and ultimately residual strain, two different conditions (22 and 3 °C/min) were investigated. In the longitudinal direction, results were nearly identical while in the transverse direction results showed a 20% discrepancy. Coefficients of thermal expansion (CTE) were also identified during a post-process heating procedure using the embedded FBGs and compared to the results of a thermo-mechanical analysis. Again, dissimilarities were observed for the transverse direction. With regards to through the thickness properties, no differences were observed for residual strains or for CTEs.
dc.description.sponsorshipThis research was funded by KAUST Baseline funding and SABIC. Authors are grateful to KAUST and SABIC for their support.
dc.publisherElsevier BV
dc.subjectA. Multifonctionnal composites
dc.subjectB. Process monitoring
dc.subjectC. Residual stress/strain, thermomechanical properties
dc.subjectD. Fiber optic sensing
dc.subjectE. Hot-press molding
dc.titleProcess monitoring of glass reinforced polypropylene laminates using fiber Bragg gratings
dc.typeArticle
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalComposites Science and Technology
dc.contributor.institutionSABIC, P.O. Box 319, AH Geleen, 6160, Netherlands
kaust.personMulle, Matthieu
kaust.personWafai, Husam
kaust.personYudhanto, Arief
kaust.personLubineau, Gilles


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