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Determining Elastic Properties from the Dynamic Response of Discontinuous Fiber Composites
Abstract
An investigation into the effect of meso-structure variation on the dynamic properties of a plate made from unidirectional pre-impregnated discontinuous carbon fiber platelets was performed. A platelet generation code was implemented to make finite element models of flat plates comprised of platelets with random in-plane orientations. While the mode shapes were not particularly sensitive to orientation changes of the platelets, natural frequency was shown to have a frequency variance similar to a normal distribution for specific modes. Using the orientation tensor developed by Advani and Tucker [1], the local effective elastic properties were calculated and shown to have a correlation with natural frequency shifts. This method could be used in the future to inform modal tap testing results to determine local material properties of discontinuous fiber parts.
DOI
10.12783/asc2017/15204
10.12783/asc2017/15204