Simultaneous optimization of composite structures considering mechanical performance and manufacturing cost

A multi-objective optimization methodology is proposed which simultaneously considers the mechanical performance and the manufacturing cost from the early stage of design of composite laminated plates. Resin transfer molding process is chosen as the manufacturing process for its wide acceptance among industries. Interrelations between the structural parameters and the process parameters are identified. With proper assumptions, the multi-objective problem is formulated into a problem with a single objective function. As design variables, the stacking sequence of layers is investigated which minimizes the maximum displacement and the mold filling time. Injection gate location is also considered in order to minimize the mold filling time for a given structure geometry, material properties and loading condition. The genetic algorithm is adopted as the optimization scheme. The results from the sample problems illustrate usefulness of the developed methodology.

[1]  Don Kelly,et al.  Multi-objective optimisation of composite aerospace structures , 2002 .

[2]  L. A. Richards.  Physics of Flow Through Porous Media , 1958 .

[3]  Adrian E. Scheidegger,et al.  The physics of flow through porous media , 1957 .

[4]  David E. Goldberg,et al.  Genetic Algorithms in Search Optimization and Machine Learning , 1988 .

[5]  Kenneth Alan De Jong,et al.  An analysis of the behavior of a class of genetic adaptive systems. , 1975 .

[6]  J. C. Halpin,et al.  Effects of Environmental Factors on Composite Materials. , 1969 .

[7]  Jens Hinrichsen,et al.  The challenge of reducing both airframe weight and manufacturing cost , 2001 .

[8]  S. Elghobashi,et al.  Handbook of numerical heat transfer: Minkowycz, Sparrow, Schneider and Pletcher, Eds. John Wiley & Sons, Ltd., 1988 , 1989 .

[9]  C. W. Hirt,et al.  Volume of fluid (VOF) method for the dynamics of free boundaries , 1981 .

[10]  Suresh G. Advani,et al.  Flow and rheology in polymer composites manufacturing , 1994 .

[11]  E. Sparrow,et al.  Handbook of Numerical Heat Transfer , 1988 .

[12]  C. Nardari,et al.  Simultaneous engineering in design and manufacture using the RTM process , 2002 .

[13]  R. J. Morgan,et al.  Anisotropic Permeability of Fiber Preforms: Constant Flow Rate Measurement , 1993 .

[14]  강문구.  A Numerical and experimental study on mold filling and void formation during resin transfer molding resin transfer molding , 1997 .

[15]  A. Harper,et al.  MIT OFFERS ECONOMIC ROUTE TO HIGH VOLUME RTM , 1998 .

[16]  Stephen W. Tsai,et al.  Design Optimization of Composite Plates: Part II—Structural Optimization by Plydrop Tapering , 1998 .

[17]  G. Marsh,et al.  PROCESS REFINEMENT KEY TO RTM SUCCESS , 1999 .

[18]  P. Carman.  Fluid flow through granular beds , 1997 .

[19]  G. Eyraud.  Programme par éléments finis d'aide à la conception des plaques stratifiées et sandwich basé sur une méthode de réanalyse , 1995 .

[20]  Amanda Jacob,et al.  Automotive composites — the road ahead , 2001 .

[21]  George S. Springer,et al.  Model for Determining the Vent Locations and the Fill Time of Resin Transfer Molds , 1995 .