A new computational tool for liquid composite moulding process design based on configuration spaces

2010 ◽  
Vol 41 (1) ◽  
pp. 58-77 ◽  
Author(s):  
N. Montés ◽  
F. Sánchez
Keyword(s):  
Process Design ◽  
Configuration Spaces ◽  
Computational Tool ◽  
Moulding Process ◽  
Liquid Composite Moulding

Modelling Tow Impregnation of Woven Fabric Reinforcements and Its Application in Liquid Composite Moulding Process Modelling

2008 ◽  
Author(s):  
Y. Wang ◽  
S. M. Grove ◽  
M. Moatamedi
Keyword(s):  
Woven Fabric ◽  
Scale Model ◽  
Flow Front ◽  
Moulding Process ◽  
Mathematical Algorithm ◽  
Model Liquid ◽  
Liquid Composite Moulding ◽  
Sink Term ◽  
Time Required ◽  
Dual Scale

This paper proposes a detail physical model for the micro-scale flow in plain woven reinforcements. The modelling results are formulated into a mathematical algorithm which is then directly incorporated into a continuum dual-scale model as a ‘sink’ term. When used to model liquid composite moulding (LCM) processes, this incorporated dual-scale model demonstrates the fact that the impregnation of fibre tows lags behind the resin front in macro pore spaces. The modelling results are in agreement with the experimental observations. It has been shown that the unsaturated region at the flow front could increase or have a fixed length under different circumstances. These differences are explained due to the variation in tow impregnation speed (or the time required for the tow to become fully impregnated) which is related to the weave infrastructure and the nesting and packing of plies. The modelling results have also demonstrated the drooping of the inlet pressure when the flow processes are carried out under constant injection rates.

Race Tracking and Related Issues in Liquid Composite Moulding Process

2014 ◽  
Vol 14 (4) ◽  
pp. 209-217
Author(s):  
Ajay Kumar ◽  
Mukul Shukla
Keyword(s):  
Numerical Simulation ◽  
Material Properties ◽  
Two Dimensional ◽  
Average Increase ◽  
Moulding Process ◽  
Liquid Composite Moulding ◽  
Set Up

AbstractRace tracking is movement of the resin along the sides, inside the mould in between the gaps of the preform and the mould; it is also the path of least friction in the flow. The issues related to design of the infusion set up to minimize the race tracking and methods of avoiding the race tracking during the infusion are highlighted in the paper. Presence of race tracking in a two-dimensional (2-D) radial infusion schemes, and the average increase in the thickness of the preform due to race tracking is evaluated here with different infusion strategy. Setups having the same material properties, and mould size are used for better comparison. The setup dimensional aspect for race tracking free infusion is also highlighted in the paper. Further numerical simulation of three different infusion strategies in the radial two-dimensional infusions is carried out to closely understand race tracking and its implications.

CAD Of Anticorrosive Protection Of Steel Structures

2019 ◽  
pp. 18-23
Keyword(s):  
Protective Coating ◽  
Computer Aided Design ◽  
Steel Structures ◽  
Cost Effective ◽  
Operating Conditions ◽  
Computational Tool ◽  
Protection Method ◽  
Cost Effective Method ◽  
The Cost ◽  
Aided Design

The choice of cost-effective method of anticorrosive protection of steel structures is an urgent and time consuming task, considering the significant number of protection ways, differing from each other in the complex of technological, physical, chemical and economic characteristics. To reduce the complexity of solving this problem, the author proposes a computational tool that can be considered as a subsystem of computer-aided design and used at the stage of variant and detailed design of steel structures. As a criterion of the effectiveness of the anti-corrosion protection method, the cost of the protective coating during the service life is accepted. The analysis of existing methods of steel protection against corrosion is performed, the possibility of their use for the protection of the most common steel structures is established, as well as the estimated period of effective operation of the coating. The developed computational tool makes it possible to choose the best method of protection of steel structures against corrosion, taking into account the operating conditions of the protected structure and the possibility of using a protective coating.

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