Hi , I am doing a project on buckling analysis of laminated composite plates with different cutouts . I would like to know what are some suitable methods for finding the volume fraction of fibers .
If you mean experimentally, simply make a sufficient number of cuts and measure the area covered by the fibres (if they are distributed homogeneously)?
Hey, you can apply a loss-on-ignition test to the cut specimens or can perform a TGA analysis if you have the equipment. The basic idea is to ignite matrix phase and weigh the remaining fiber weight fraction inside of your composite. Then do the weight to volume transformation by density of each phase.
Dear Aamir,
Kindly practice ASTM D3171, Standard Test Methods for Constituent Content of Composite Materials.
It is the most common and reliable laboratory method. However, there is a practical numerical method which your composite must be unidirection. In case you required second option, let me know to share it with you.
Regards,
Amin
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