Experimental Validation of Dependence Map based Control in Liquid Composite Molding

2005 ◽  
Vol 40 (13) ◽  
pp. 1137-1162 ◽  
Author(s):  
Jeffrey M. Lawrence ◽  
Patrice Hughes ◽  
Suresh G. Advani
Keyword(s):  
Experimental Validation ◽  
Liquid Composite Molding ◽  
Composite Molding

Simulation of Reactive Liquid Composite Molding

1998 ◽  
Vol 13 (4) ◽  
pp. 389-397 ◽  
Author(s):  
C.-H. Wu ◽  
H.-T. Chiu ◽  
L. J. Lee ◽  
S. Nakamura
Keyword(s):  
Liquid Composite Molding ◽  
Composite Molding ◽  
Reactive Liquid

Modélisation viscoélastique des renforts fibreux dans les procédés de type Liquid Composite Molding (LCM)

2014 ◽  
Vol 24 (3) ◽  
pp. 367-381
Author(s):  
Mack Boris Nziengui ◽  
Hind Abdellaoui ◽  
Jamal Echaabi ◽  
Mohamed Hattabi
Keyword(s):  
Liquid Composite Molding ◽  
Composite Molding

scholarly journals A Conceptional Approach of Resin-Transfer-Molding to Rosin-Sourced Epoxy Matrix Green Composites

Aerospace ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 5
Author(s):  
Sicong Yu ◽  
Xufeng Zhang ◽  
Xiaoling Liu ◽  
Chris Rudd ◽  
Xiaosu Yi
Keyword(s):  
Composite Laminates ◽  
Resin Transfer Molding ◽  
High Viscosity ◽  
Ramie Fiber ◽  
Liquid Composite Molding ◽  
Curing Agent ◽  
Molding Process ◽  
Transfer Molding ◽  
Low Viscosity ◽  
Composite Molding

In this concept-proof study, a preform-based RTM (Resin Transfer Molding) process is presented that is characterized by first pre-loading the solid curing agent onto the preform, and then injecting the liquid nonreactive resin with an intrinsically low viscosity into the mold to infiltrate and wet the pre-loaded preform. The separation of resin and hardener helped to process inherently high viscosity resins in a convenient way. Rosin-sourced, anhydrite-cured epoxies that would normally be regarded as unsuited to liquid composite molding, were thus processed. Rheological tests revealed that by separating the anhydrite curing agent from a formulated RTM resin system, the remaining epoxy liquid had its flowtime extended. C-scan and glass transition temperature tests showed that the preform pre-loaded with anhydrite was fully infiltrated and wetted by the liquid epoxy, and the two components were diffused and dissolved with each other, and finally, well reacted and cured. Composite laminates made via this approach exhibited roughly comparable quality and mechanical properties with prepreg controls via autoclave or compression molding, respectively. These findings were verified for both carbon and ramie fiber composites.

Fiber optic flow and cure sensing for liquid composite molding

2001 ◽  
Vol 35 (2) ◽  
pp. 91-104 ◽  
Author(s):  
Joy P. Dunkers ◽  
Joseph L. Lenhart ◽  
Sylvia R. Kueh ◽  
John H. van Zanten ◽  
Suresh G. Advani ◽  
...  
Keyword(s):  
Optic Flow ◽  
Fiber Optic ◽  
Liquid Composite Molding ◽  
Composite Molding

Experimental study of saturation by visible light transmission in dual-scale fibrous reinforcements during composite manufacturing

2017 ◽  
Vol 36 (23) ◽  
pp. 1693-1711 ◽  
Author(s):  
F LeBel ◽  
É Ruiz ◽  
F Trochu
Keyword(s):  
Visible Light ◽  
Light Transmission ◽  
Void Formation ◽  
In Situ Monitoring ◽  
Injection System ◽  
Computer Assisted ◽  
Liquid Composite Molding ◽  
Composite Molding ◽  
The Impact ◽  
Dual Scale

A new in situ monitoring strategy is proposed to study void formation during real-time impregnation of dual-scale fibrous reinforcements in liquid composite molding. Void content data from burn-off tests are used to calibrate a refractive index matching approach based on two optical principles: Beer–Lambert and Fresnel laws. Once calibrated, this approach based on visible light transmission is used to study the impact of key process parameters on the saturation footprint of dual-scale fibrous reinforcements during and after mold filling. The injection parameters investigated are the flow front velocity, the pressure distribution inside the mold cavity, the bleeding flow rate, and the mold packing pressure. The experimental setup is a computer-assisted injection system and a transparent resin transfer molding mold is used to perform unidirectional injections. A vinyl ester resin is injected through E-glass bidirectional non-crimp fabrics under various manufacturing conditions. This investigation not only confirms the decreasing trend in void formation by mechanical entrapment of air with the decrease in impregnation velocity, as it converges toward the optimal impregnation conditions for this fibrous reinforcement reported in previous studies, but it also brings insights on void dissolution and transport in liquid composite molding.

Sign in / Sign up

Export Citation Format

Share Document