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I need to Input "E" the tensile modulus for analysis of a composite layer made from Plain Woven E-Glass Epoxy composite material. I know the GSM (g/m^2) of fabric is 106. Using GSM =106, geometry of the laminate, can we determine tensile modulus of the resulting composite.

Thanks RJ

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  • $\begingroup$ Make and test. Will it be directionally affected.? Or get values for each and calculate likely results based on orientation. $\endgroup$
    – Solar Mike
    Dec 24, 2022 at 7:42
  • $\begingroup$ We want to predict analytically prior to test. Its same in X and Y direction $\endgroup$ Dec 24, 2022 at 7:51
  • $\begingroup$ So if you have two differents strings in parallel - how does the tensile strength combine? A bit of thought here… $\endgroup$
    – Solar Mike
    Dec 24, 2022 at 7:56
  • $\begingroup$ Need Micro-mechanics model for woven similar to we have for Unidirectional layers. People working with Micromechanics of Composites can help $\endgroup$ Dec 24, 2022 at 10:20
  • $\begingroup$ That’s the type of thing covered in mechanics of materials and simple mathe like trigonometry: sines of angles etc $\endgroup$
    – Solar Mike
    Dec 24, 2022 at 10:36

1 Answer 1

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For particle or short fibre unaligned reinforcement you use the volume fraction of resin, and for the fibres the Vf of that.

For woven fibres it is more complex and you need to account for curvature of the fibres. As such a method that examines a unit cell of the weave is needed, as discussed in any serious composite book, or DOI:10.1007/s42405-021-00365-z for example.

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