In-situ cure monitoring of an out-of-autoclave prepreg: Effects of out-time on viscosity, gelation and vitrification

2014 ◽  
Vol 102 ◽  
pp. 132-138 ◽  
Author(s):  
D. Kim ◽  
T. Centea ◽  
S.R. Nutt
Keyword(s):  
Cure Monitoring ◽  
Out Of Autoclave

In-situ dielectric cure monitoring as a method of measuring the influence of cure temperature on natural rubber vulcanization

2020 ◽  
Author(s):  
Narong Chueangchayaphan ◽  
Nattapong Nithi-Uthai ◽  
Kittiphan Techakittiroj ◽  
Hathaikarn Manuspiya
Keyword(s):  
Natural Rubber ◽  
Cure Monitoring ◽  
Cure Temperature

Evanescent wave spectroscopy for in-situ cure monitoring

1996 ◽  
Author(s):  
Sheryl L. Cossins ◽  
Mike E. Connell ◽  
William M. Cross ◽  
Robb M. Winter ◽  
Jon J. Kellar
Keyword(s):  
Evanescent Wave ◽  
Cure Monitoring

scholarly journals A comparison of mechanical properties and X-ray tomography analysis of different out-of-autoclave manufactured thermoplastic composites

2020 ◽  
Vol 39 (19-20) ◽  
pp. 703-720
Author(s):  
Diego Saenz-Castillo ◽  
María I Martín ◽  
Vanessa García-Martínez ◽  
Abhiram Ramesh ◽  
Mark Battley ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Raw Material ◽  
Thermoplastic Composites ◽  
Scanning Calorimetry ◽  
Consolidation Process ◽  
Plane Shear ◽  
X Ray ◽  
Void Distribution ◽  
Out Of Autoclave

Three different out-of-autoclave manufacturing processes of CF/poly-ether-ether-ketone thermoplastic composites were characterized, including innovative laser-assisted automated fibre placement with in situ consolidation. Characterization techniques included differential scanning calorimetry, ultrasonic non-destructive testing and matrix digestion, in addition to 3D X-ray microcomputed tomography to investigate the void distribution, size and shape. The results revealed that in situ consolidation process can lead to the accumulation of large voids between the upper layers. Interlaminar shear, in-plane shear, tensile and flexure testing were used for mechanical evaluation. A reduction in the mechanical properties was observed for in situ consolidation laminates when compared to the other out-of-autoclave methods. The drop in mechanical properties of in situ consolidation laminates was mainly attributed to the differences found in void distribution and size. Optimization of processing parameters along with higher quality prepreg raw material could be of assistance for the improvement of mechanical properties of in situ consolidation structures.

Fiber Optic Sensor Development for Real-Time In-Situ Epoxy Cure Monitoring

1997 ◽  
Vol 31 (1) ◽  
pp. 87-102 ◽  
Author(s):  
Y. M. Liu ◽  
C. Ganesh ◽  
J. P. H. Steele ◽  
J. E. Jones
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Development ◽  
Cure Monitoring ◽  
Optic Sensor

In situ cure monitoring of epoxy resins using fiber-optic Raman spectroscopy

1994 ◽  
Vol 53 (13) ◽  
pp. 1805-1812 ◽  
Author(s):  
R. E. Lyon ◽  
K. E. Chike ◽  
S. M. Angel
Keyword(s):  
Raman Spectroscopy ◽  
Epoxy Resins ◽  
Fiber Optic ◽  
Cure Monitoring

Near-Infrared Spectroscopy for in situ Cure Monitoring of Dimethacrylate-Based Networks

2000 ◽  
Vol 54 (1) ◽  
pp. 39-43 ◽  
Author(s):  
L. Rey ◽  
J. Galy ◽  
H. Sautereau ◽  
G. Lachenal ◽  
D. Henry ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Cure Monitoring

scholarly journals Challenges of complex monitoring of the curing parameters in coupons for LRI manufacturing

2021 ◽  
Vol 13 (1) ◽  
pp. 203-210
Author(s):  
A. TORRE-POZA ◽  
A. M. R. PINTO ◽  
T. GRANDAL ◽  
N. GONZÁLEZ-CASTRO ◽  
L. CARRAL ◽  
...  
Keyword(s):  
Process Parameters ◽  
Manufacturing Process ◽  
Critical Issue ◽  
Cure Monitoring ◽  
Thermoset Composites ◽  
Monitoring Strategies ◽  
Wing Structures ◽  
Complex Monitoring ◽  
Out Of Autoclave ◽  
Liquid Resin Infusion

In the aerospace industry, Liquid Resin Infusion (LRI) is gaining more and more importance as an out-of-autoclave alternative manufacturing technique to traditional pre-impregnated (prepreg) fabrics. The research in this field has been focused on understanding the cure and the process parameters of these materials, aiming to optimize the manufacturing process and reduce costs. A major problem derived from these technologies is the distortions induced by LRI process, affecting to composite parts due to non-uniform distribution of residual stresses. Such distortions can lead to non-uniform parts with shape distortions, which is a critical issue when trying to assembly with other parts due to mismatches in shape, leading to the rejection of such components. In this context, ELADINE project aims to understand and quantify the key manufacturing parameters that cause shape distortions on composite coupons (such as spring-in of curved parts) using an integrated numerical-experimental approach. The manufacturing process will be accurately monitored through Fiber Optic Sensors (FOS) and Dielectric sensors (DC) to understand how the process variables affect the distortion phenomena. The monitored data will feed a simulation tool for spring-in prediction for large integral composite wing structures. This article covers the preliminary results of cure monitoring and process parameters of thermoset composites implementing monitoring strategies for manufactured coupons by LRI.

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