A comprehensive filling and tooling force analysis for rigid mould LCM processes

Abstract A comprehensive tooling force analysis is presented for rigid tool Liquid Composite Moulding (LCM) processes such as Resin Transfer Moulding (RTM) and Injection/Compression Moulding (I/CM). This has been implemented within SimLCM, a generic LCM filling simulation under development at the University of Auckland. The simulation has been verified against existing analytic and semi-analytic solutions, considering fill times and clamping force due to reinforcement compaction. Industrial application is demonstrated through consideration of a fireman’s helmet, which has demonstrated the complex evolution of both local and global tooling forces during RTM and I/CM cycles. Resultant forces are computed in the closing and lateral directions, having practical benefits for design of moulds and supporting equipment. The evolution of tooling forces has been shown to be sensitive to the accuracy of the applied fibre reinforcement compaction model, which is used to predict normal and tangential stresses exerted on mould surfaces.

[1]  Akbar Shojaei,et al.  Numerical simulation of three-dimensional flow and analysis of filling process in compression resin transfer moulding , 2006 .

[2]  Z. Cai.  A Nonlinear Viscoelastic Model for Describing the Deformation Behavior of Braided Fiber Seals , 1995 .

[3]  Joël Bréard,et al.  Analysis of dynamic flows through porous media. Part II: Deformation of a double-scale fibrous reinforcement , 2003 .

[4]  Piaras Kelly,et al.  Global Optimization of Mould Filling Parameters during the Constant Speed Injection Compression Moulding Process , 2008 .

[5]  Simon Bickerton,et al.  Modeling forces generated within rigid liquid composite molding tools. Part B: Numerical analysis , 2007 .

[6]  François Robitaille,et al.  Compaction of textile reinforcements for composites manufacturing. I: Review of experimental results , 1998 .

[7]  Piaras Kelly.  A Fibre Compaction Model for Liquid Composite Moulding , 2007 .

[8]  D. Bhattacharyya,et al.  Exploring the Non-Elastic Compression Deformation of Dry Glass Fibre Reinforcements , 2007 .

[9]  L. J. Lee,et al.  Mold filling and curing analysis in liquid composite molding , 1993 .

[10]  Constantina Lekakou,et al.  Compression in the processing of polymer composites 1. A mechanical and microstructural study for different glass fabrics and resins , 1999 .

[11]  W. Lee,et al.  Analysis of resin transfer/compression molding process , 1999 .

[12]  F. Trochu,et al.  Numerical analysis of the resin transfer molding process by the finite element method , 1993 .

[13]  Chih-Yuan Chang,et al.  Simulation of Mold Filling in Simultaneous Resin Injection/Compression Molding , 2006 .

[14]  Piaras Kelly,et al.  Application of a Complete Tooling Force Analysis for Simulation of Liquid Composite Moulding Processes , 2007 .

[15]  F. Trochu,et al.  Advanced numerical simulation of liquid composite molding for process analysis and optimization , 2006 .

[16]  Timothy G. Gutowski,et al.  Advanced composites manufacturing , 1997 .

[17]  Ming-Shyan Huang,et al.  Simulation of injection-compression mold-filling process , 1998 .

[18]  Kumar K. Tamma,et al.  On a Pure Finite-Element-Based Methodology for Resin Transfer Mold (RTM) Filling Simulations. , 1999 .

[19]  Suresh G. Advani,et al.  Desirable features in mold filling simulations for Liquid Composite Molding processes , 2004 .

[20]  S. Bickerton,et al.  Modeling forces generated within rigid liquid composite molding tools. Part A: Experimental study , 2007 .

[21]  Piaras Kelly,et al.  Viscoelastic response of dry and wet fibrous materials during infusion processes , 2006 .

[22]  Joseph P. Greene,et al.  Analysis of an injection/compression liquid composite molding process , 1998 .

[23]  Christophe Binetruy,et al.  Simulation of LCM processes involving induced or forced deformations , 2006 .

[24]  Simon Bickerton,et al.  Modeling and evaluation of the filling stage of injection/compression moulding , 2003 .

[25]  Xuan-Tan Pham,et al.  Simulation of compression resin transfer molding to manufacture thin composite shells , 1999 .