Prediction of curing process for thermosetting prepreg compression molding process based on machine learning

Abstract Glass fiber/epoxy resin composites (GF/EP) were prepared using one and three multiwalled carbon nanotube buckypapers (BPs) as a resistive element. Compared to the conventional hot compression molding process that demanded 4200 W to fabricate the GF/EP laminate, the proposed curing process consumed only 63 W, representing a saving power of 98.5%. The thermal distribution of the BP and their composites were recorded using an infrared thermometer. Differential scanning calorimetry (DSC) curves have not shown a residual cure, suggesting the curing process using the BP as a resistive element was effective. The cross section views of the laminates were analyzed by scanning electron microscopy (SEM), and the mechanical characterizations were performed by impulse excitation technique (IET), compression shear test (CST), and interlaminar shear strength (ILSS). The results demonstrated that the BP composites showed a good consolidation between the prepregs layers, and presented no significant variations in the mechanical tests compared to the traditional hot compression molding process. Nevertheless, dynamic mechanical analyses (DMA) showed a slight decrease in the BP composites’ storage moduli compared to GF/EP laminate.

Download Full-text

A Study of Processing Conditions on the Properties of Diffraction Optical Elements by Injection/Compression Molding Process

International Polymer Processing ◽

10.3139/217.1733 ◽

2003 ◽

Vol 18 (2) ◽

pp. 194-198 ◽

Cited By ~ 5

Author(s):

S. C. Tseng ◽

C. L. Liao

Keyword(s):

Compression Molding ◽

Processing Conditions ◽

Molding Process ◽

Optical Elements ◽

Injection Compression Molding ◽

Diffraction Optical Elements

Download Full-text

Innovation in Aircraft Cabin Interior Panels Part I: Technical Assessment on Replacing the Honeycomb with Structural Foams and Evaluation of Optimal Curing of Prepreg Fiberglass

Polymers ◽

10.3390/polym13193207 ◽

2021 ◽

Vol 13 (19) ◽

pp. 3207 ◽

Cited By ~ 1

Author(s):

Edgar Adrián Franco-Urquiza ◽

Annika Dollinger ◽

Mauricio Torres-Arellano ◽

Saúl Piedra ◽

Perla Itzel Alcántara Llanas ◽

...

Keyword(s):

Weight Ratio ◽

Viscoelastic Behavior ◽

Compression Molding ◽

Polyurethane Foams ◽

Future Research ◽

Honeycomb Core ◽

Molding Process ◽

Aircraft Cabin ◽

Structural Applications ◽

Cabin Interior

Sandwich composites are widely used in the manufacture of aircraft cabin interior panels for commercial aircraft, mainly due to the light weight of the composites and their high strength-to-weight ratio. Panels are used for floors, ceilings, kitchen walls, cabinets, seats, and cabin dividers. The honeycomb core of the panels is a very light structure that provides high rigidity, which is considerably increased with fiberglass face sheets. The panels are manufactured using the compression molding process, where the honeycomb core is crushed up to the desired thickness. The crushed core breaks fiberglass face sheets and causes other damage, so the panel must be reworked. Some damage is associated with excessive build-up of resin in localized areas, incomplete curing of the pre-impregnated fiberglass during the manufacturing process, and excessive temperature or residence time during the compression molding. This work evaluates the feasibility of using rigid polyurethane foams as a substitute for the honeycomb core. The thermal and viscoelastic behavior of the cured prepreg fiberglass under different manufacturing conditions is studied. The first part of this work presents the influence of the manufacturing parameters and the feasibility of using rigid foams in manufacturing flat panels oriented to non-structural applications. The conclusion of the article describes the focus of future research.

Download Full-text

Formation of Barrier Ribs via Micro Molding Process Using UV-Curable Paste

Materials Science Forum ◽

10.4028/www.scientific.net/msf.534-536.1029 ◽

2007 ◽

Vol 534-536 ◽

pp. 1029-1032

Author(s):

Yong Seog Kim ◽

Tae Gum Koh ◽

Yoo Seong Kim

Keyword(s):

Uv Curing ◽

Processing Route ◽

Curing Process ◽

Plasma Display Panel ◽

Molding Process ◽

Uv Curable ◽

Processing Cost ◽

Plasma Display ◽

Uv Curing Process ◽

Sintering Shrinkage

In an attempt to reduce processing cost and to improve the resolution of PDPs, a micro mold transfer processing route for barrier ribs of plasma display panel was attempted. In this study, the parameters that may cause defects during the process were identified, which include the shrinkage during the UV curing process, stress due to the evaporation of organic components, and sintering shrinkage. Considering such parameters, a UV curable paste was developed and the barrier ribs of PDPs were successfully processed via the process. This work demonstrated the possibility of a build-up route in manufacturing barrier ribs of PDP

Download Full-text

BVID analysis of non-crimp fabric cross-ply laminate manufactured through wet compression molding process

AIAA Scitech 2020 Forum ◽

10.2514/6.2020-0727 ◽

2020 ◽

Author(s):

Sooyoung Lee ◽

Chaeyoung Hong ◽

Taeseong Choi ◽

Hye-gyu Kim ◽

Wooseok Ji

Keyword(s):

Compression Molding ◽

Molding Process ◽

Wet Compression

Download Full-text

Study on Processes and Properties of Continuous Woven Roving Reinforced Polyurethane Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.306-307.879 ◽

2011 ◽

Vol 306-307 ◽

pp. 879-883 ◽

Cited By ~ 1

Author(s):

Xiao Li Dai ◽

Xiang Wang ◽

Jun Wang

Keyword(s):

Mass Fraction ◽

Interfacial Adhesion ◽

Bending Strength ◽

Compression Molding ◽

Micro Structure ◽

Molding Process ◽

Elongation At Break ◽

Vacuum Infusion ◽

Polyurethane Composites ◽

Sem Morphology

E-glass fiber woven roving reinforced polyurethane composites were manufactured by three different processes: hand lay-up, compression molding and vacuum infusion to assess the feasibility of all the processes. The results showed that all composites led to significant improvements in both flexural and tensile properties except elongation at break in comparison with the neat PU. Among the three processes, the best bending strength was exhibited by the hand lay-up process. This is attributed to higher PU mass fraction leads to a better fiber–matrix interfacial adhesion. Mechanical properties of the composite molded by vacuum infusion were superior to that produced by compression molding process. The SEM morphology revealed that vacuum infusion composite had more homogeneous micro- structure.

Download Full-text