Characterization and FEA of short-fiber-reinforced plastics for better prediction of the acoustic properties of structural components

摘要

As part of this contribution a procedure is presented regarding how, with the aid of FEM, it is possible to predict the vibration behavior of short-fiber-reinforced structural components, while taking into account the anisotropy of the material behavior. On the basis of extensive series of experiments, the frequency-dependent, anisotropic stiffness and damping properties of the material used, a PA66 GF50, are determined. In order to examine wide frequency range, a test set-up was developed for obtaining material data by means of a bending resonance method. From these experimental data, material models are derived which can take into account anisotropic material behavior. The approach used in calculation is validated on a complex engine mount geometry with the aid of the modal vibration behavior of the component. Here the simulation can reproduce the experiment well.