By A. J. Beaussart, R. B. Pipes, R. K. Okine (auth.), S. G. Advani, W. R. Blain, W. P. de Wilde, J. W. Gillespie Jr., O. H. Griffin Jr. (eds.)

Co-published with Computational Mechanics guides, united kingdom. Papers provided on the 3rd foreign convention on machine Aided know-how layout in Composite fabric expertise, college of Delaware, Newark, united states, may well 1992.

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The mechanical model describing the resin flow rate and the flow pressure distribution during the process can be used for optimization of the volume and mass fraction of glass and epoxy resin and prediction of the residual stresses which are generated during press processing. The fiber reinforced composites manufacturing process with the usage multi-daylight presses includes exposing of the laminate packages to high temperature and pressure, both of them being time-dependent. 1 ). Due to large mass of the press plates, the temperature-time dependence can not be exactly regulated and usually it is measured during the process.

2 ) is considered. Ek are the kinetic constants of the resin, R is the universal gas constant, T is the absolute temperature. 3. The final resin fraction defines the elastic and thermomechanical properties of material such as moduli and thermal expansion coefficients. One of the optimization requirements is that the thermal expansion coefficients of the composite and copper foil should be equal. In this case, the stresses which appear after cooling from the pressing temperature to the room temperature at the end of the manufacturing process are minimal.

0 • • • • • • • • • • • • • &0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thicknesses dispersion depending on time moment t12, first approximation. 10 5 Pa) gives the minimal dispersion. r. . ·. ·. ·. . r. . . . . . . . r. . ·. . . . ·. ·1 : : : : ·i : . ····--r-----r-;: . r;- . ·r.................... r. . . . . . . . ··1 : . 0 :.. · ..................

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