In-situ monitoring of the resin transfer molding impregnation and cure process

1991 ◽  
Vol 31 (1) ◽  
pp. 56-60 ◽  
Author(s):  
D. Kranbuehl ◽  
D. Eichinger ◽  
T. Hamilton ◽  
R. Clark
Keyword(s):  
Resin Transfer Molding ◽  
In Situ Monitoring ◽  
Cure Process ◽  
Transfer Molding

scholarly journals In-Situ Void Content Measurements during Resin Transfer Molding

2014 ◽  
Vol 40 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Ryosuke MATSUZAKI ◽  
Daigo SETO ◽  
Akira TODOROKI ◽  
Yoshihiro MIZUTANI
Keyword(s):  
Resin Transfer Molding ◽  
Void Content ◽  
Transfer Molding

scholarly journals Cure-induced residual stresses for warpage reduction in thermoset laminates

2020 ◽  
Vol 54 (22) ◽  
pp. 3055-3065 ◽  
Author(s):  
Giacomo Struzziero ◽  
Davide Nardi ◽  
Jos Sinke ◽  
J J E Teuwen
Keyword(s):  
Residual Stresses ◽  
Resin Transfer Molding ◽  
Process Time ◽  
Fe Model ◽  
Cure Process ◽  
Molding Process ◽  
Tensile Stresses ◽  
Transfer Molding ◽  
Cure Cycle ◽  
Compressive Stresses

The paper addresses the role played by the cure stage of a vacuum assisted resin transfer molding process in residual stresses generation. The Airstone 780E epoxy resin and Hardener 785H system broadly used in the wind turbine blade industry has been used in this study. The viscous–elastic properties of the resin have been characterized and implemented in a thermo-mechanical FE model. The model has been validated against manufactured [0/90]4 asymmetric laminates. Analysis of residual stresses generation highlighted that compressive stresses generation occurs when the cure is shrinkage dominated and tensile stresses when expansion dominated in the 0° plies. The finding points out that 10% reduction in warpage and 33% reduction in process time can be obtained by selecting cure cycle parameters that allow tensile stresses development during the cure process in the 0° plies.

scholarly journals Preparation of Glass Fabric/Poly(l-lactide) Composites by Thermoplastic Resin Transfer Molding

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 339 ◽  
Author(s):  
Elodie Louisy ◽  
Fabienne Samyn ◽  
Serge Bourbigot ◽  
Gaëlle Fontaine ◽  
Fanny Bonnet
Keyword(s):  
Resin Transfer Molding ◽  
Bulk Polymerization ◽  
Thermoplastic Resin ◽  
Experimental Conditions ◽  
Dynamic Vacuum ◽  
Transfer Molding ◽  
The Matrix ◽  
Closed Mold ◽  
Process Transfer

This study reports the first example of the production of polylactide composites prepared by Thermoplastic Resin Transfer Molding (T-RTM) via in situ bulk polymerization of l-lactide (l-LA) after injection in a closed mold containing glass fabrics. Tin octoate Sn(Oct)2 was used as the catalyst and first evaluated at the lab-scale in the experimental conditions required in the tank and in the mold of the RTM device. The reactions were then upscaled in the RTM in the absence of reinforcement to ensure the feasibility of the process (transfer and polymerization). Finally, poly-l-lactide (PLLA)-based composites with glass fabrics as the reinforcement were obtained. The resulting PLLA matrices exhibited conversions up to 99% along with high molar masses of up to 78,000 g·mol−1 when the polymerization was carried out under dynamic vacuum (vacuum-assisted RTM, VARTM). Moreover, a good impregnation of the glass fabrics by the matrix was observed by optical microscopy.

In situ void content measurements during resin transfer molding

2013 ◽  
Vol 22 (4) ◽  
pp. 239-254 ◽  
Author(s):  
Ryosuke Matsuzaki ◽  
Daigo Seto ◽  
Akira Todoroki ◽  
Yoshihiro Mizutani
Keyword(s):  
Resin Transfer Molding ◽  
Void Content ◽  
Transfer Molding

In situ sensor monitoring and intelligent control of the resin transfer molding process

1994 ◽  
Vol 15 (4) ◽  
pp. 299-305 ◽  
Author(s):  
D. E. Kranbuehl ◽  
P. Kingsley ◽  
S. Hart ◽  
G. Hasko ◽  
B. Dexter ◽  
...  
Keyword(s):  
Intelligent Control ◽  
Resin Transfer Molding ◽  
Molding Process ◽  
Transfer Molding ◽  
In Situ Sensor ◽  
Sensor Monitoring
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