Dear All,
Currently my friends and I are in the middle of a University metallurgy assignment regarding the manufacturing of a fibrous composite component, where one of the tasks given is to calculate the theoretical values of both the Young's Modulus (E) and the ultimate tensile strength (UTS) of this fibrous composite, so that finally we can compare them to those found experimentally by means of tensile testing. Till now, I only managed to find the equations for both when the loading is either longitudinal or tranverse, and also for a uni-directional fibrous composite only. Do equations for both E and UTS exist for multi-directional composites?
It depends on the type of the filler. If the filler is long fibre you should use the transverse and longitudinal modulus. You can asume the modulus of fibre and matrix is the same for both transverse and longitudinal loading or it can be categorised as isotropic thus the modulus of transverse and longitudinal is the same value. In other case such as short fibre or nanosheets, you can use halpin-tsai or other short fibre equations. I have published about the polymer nanocomposite theoretical and experimental properties. Please kindly have a look at the supplementary data section as well. https://www.researchgate.net/publication/316950592_Titanate_nanotubes_and_nanosheets_as_a_mechanical_reinforcement_of_water-soluble_polyamic_acid_Experimental_and_theoretical_studies
It depends on the type of the filler. If the filler is long fibre you should use the transverse and longitudinal modulus. You can asume the modulus of fibre and matrix is the same for both transverse and longitudinal loading or it can be categorised as isotropic thus the modulus of transverse and longitudinal is the same value. In other case such as short fibre or nanosheets, you can use halpin-tsai or other short fibre equations. I have published about the polymer nanocomposite theoretical and experimental properties. Please kindly have a look at the supplementary data section as well. https://www.researchgate.net/publication/316950592_Titanate_nanotubes_and_nanosheets_as_a_mechanical_reinforcement_of_water-soluble_polyamic_acid_Experimental_and_theoretical_studies
Dear vella
I think this reference can help you
Titanate nanotubes and nanosheets as a mechanical reinforcement of water-soluble polyamic acid: Experimental and theoretical studies
Yes Refer classical lamination theory. Using the analytical equations mentioned in theory you can evaluate the theoretical values of modulus.
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