Effects of Injection Pressure in Resin Transfer Moulding (RTM) of Woven Carbon Fibre/Epoxy Composites

2006 ◽  
Vol 14 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Cevdet Kaynak ◽  
Y. Onur Kas
Keyword(s):  
Carbon Fibre ◽  
Injection Pressure ◽  
Epoxy Composites ◽  
Resin Transfer Moulding ◽  
Transfer Moulding

scholarly journals Design of a Carbon Fiber Bicycle Stem using a Novel Internal Bladder Resin Transfer Molding Technique

2010 ◽  
Vol 19 (1) ◽  
pp. 096369351001900
Author(s):  
Maxime Thouin ◽  
Hossein Ghiasi ◽  
Larry Lessard
Keyword(s):  
Carbon Fibre ◽  
Complex Geometry ◽  
Resin Transfer Moulding ◽  
Composite Manufacturing ◽  
Transfer Molding ◽  
Novel Approach ◽  
Small Complex ◽  
Fibre Composites ◽  
Transfer Moulding ◽  
Carbon Fibre Composites

The goal of this research is to design, analyze, and manufacture a carbon fibre bicycle stem that maximizes the use of carbon fibre composites. The stem is a part of the bicycle that connects the handlebar to the fork. The design is difficult due to the small size and complex geometry of the part, thus not obvious to conceive with a standard composite manufacturing approach. A novel approach using an inner bladder resin transfer moulding (RTM) technique is used to manufacture the bicycle stem. The design of the moulds incorporates some efficient devices to facilitate various steps in the manufacturing process. The resulting design is successful in terms of weight, stiffness, strength, and aesthetic properties. The developed technique used in this project can be applied as a possible solution to the design and fabrication of small, complex, hollow composite parts.

scholarly journals Simulation of Air Entrapment and Resin Curing During Manufacturing of Composite Cab Front by Resin Transfer Moulding Process

2017 ◽  
Vol 62 (3) ◽  
pp. 1839-1844 ◽  
Author(s):  
Raghu Raja Pandiyan Kuppusamy ◽  
S. Neogi
Keyword(s):  
Injection Pressure ◽  
Resin Transfer Moulding ◽  
Optimization Strategy ◽  
Air Entrapment ◽  
Cure Reaction ◽  
Filling Stage ◽  
Mould Filling ◽  
Cure Time ◽  
Simulation Results ◽  
Transfer Moulding

AbstractMould filling and subsequent curing are the significant processing stages involved in the production of a composite component through Resin Transfer Moulding (RTM) fabrication technique. Dry spot formation and air entrapment during filling stage caused by improper design of filling conditions and locations that lead to undesired filling patterns resulting in defective RTM parts. Proper placement of inlet ports and exit vents as well as by adjustment of filling conditions can alleviate the problems during the mould filling stage. The temperature profile used to polymerize the resin must be carefully chosen to reduce the cure time. Instead of trial and error methods that are expensive, time consuming, and non-optimal, we propose a simulation-based optimization strategy for a composite cab front component to reduce the air entrapment and cure stage optimization. In order to be effective, the optimization strategy requires an accurate simulation of the process utilizing submodels to describe the raw material characteristics. Cure reaction kinetics and chemo-rheology were the submodels developed empirically for an unsaturated polyester resin using experimental data. The simulations were performed using commercial software PAM RTM 2008, developed by ESI Technologies. Simulation results show that the use of increase in injection pressure at the inlet filling conditions greatly reduce the air entrapped. For the cab front, the alteration of injection pressure with proper timing of vent opening reduced the air entrapped during mould filling stage. Similarly, the curing simulation results show that the use of higher mould temperatures effectively decreases the cure time as expected.

A model for fibre washout during high injection pressure resin transfer moulding

2018 ◽  
Vol 37 (13) ◽  
pp. 865-876 ◽  
Author(s):  
Masoud Bodaghi ◽  
Pavel Simacek ◽  
Suresh G Advani ◽  
Nuno C Correia
Keyword(s):  
Injection Pressure ◽  
Resin Transfer Moulding ◽  
Manufacturing Defects ◽  
One Dimensional ◽  
Injection Process ◽  
High Injection ◽  
High Injection Pressure ◽  
The One ◽  
Transfer Moulding ◽  
Insight Into

High injection pressure resin transfer moulding is a variant of resin transfer moulding in which the preform is compressed in a tool and resin is injected into the mould under very high pressure. The high injection pressure (>20 bar) introduces possible fibre washout that translates into manufacturing defects or causes inconsistencies in processing and leads to scatter in mechanical properties of composite parts. A model is presented which quantifies and provides insight into the influence of process variables such as clamping force and injection pressure on fibre washout distance (the one-dimensional model assumes a rigid preform). A generalised one-dimensional stress model for fibre washout is presented for regions that are impregnated with the resin and the regions that are dry. The model shows fibre washout to be significant at the beginning of the injection process. The model allows one to further refine the injection strategy by adjusting injection pressure to account for washout in high injection pressure resin transfer moulding.

Mechanical properties of microwave cured glass fibre epoxy composites prepared by resin transfer moulding

2014 ◽  
Vol 49 (23) ◽  
pp. 2839-2847 ◽  
Author(s):  
Stefan Maenz ◽  
Mike Mühlstädt ◽  
Klaus D Jandt ◽  
Jörg Bossert
Keyword(s):  
Mechanical Properties ◽  
Glass Fibre ◽  
Epoxy Composites ◽  
Resin Transfer Moulding ◽  
Transfer Moulding

Effect of Stitching Density of Nonwoven Fiber Mat towards Mechanical Properties of Kenaf Reinforced Epoxy Composites Produced by Resin Transfer Moulding (RTM)

2011 ◽  
Vol 471-472 ◽  
pp. 987-992 ◽  
Author(s):  
Muhamad Saifuddin Salim ◽  
Zainal Arifin Mohd Ishak ◽  
Suhail Abdul Hamid
Keyword(s):  
Mechanical Properties ◽  
Natural Fibre ◽  
Epoxy Composites ◽  
Resin Transfer Moulding ◽  
Kenaf Fiber ◽  
Fiber Loading ◽  
Kenaf Fibre ◽  
Nonwoven Fiber ◽  
Transfer Moulding ◽  
Fibre Loading

This study will focus on the usage of kenaf as a natural fibre in producing a composite materials consists of epoxy resin by resin transfer moulding (RTM). The variation amount of fiber loading and nonwoven fibre mat condition seems can give significant changes in properties of polymer composite in terms of mechanical aspects. Optimization of stitching density of nonwoven kenaf fibre mat manages to increase the mechanical behaviour. At higher degree of fibre loading, these enhancement properties are more apparent. Depending upon the direction of stitching process in producing nonwoven kenaf fiber mat, the composite obtained exhibit anisotropy behaviour in which the mechanical properties are vary upon the stitching direction of nonwoven mat.

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