Improvements in design and failure prediction of short fiber reinforced plastic parts

摘要

An improved prediction of a part's lifetime does not only require consideration of temperature, time dependent deformation and stress behavior of the polymer or composite, but also a precise estimation of ultimate stress and strain values for the particular material and application. Considering short fiber reinforced polymers, the dependencies of the characteristic mechanical properties on the boundary conditions of the application have to be regarded as well as their local anisotropy. A consistent simulation technique is presented, in which injection molding simulation and structural finite element simulation are coupled by suitable interfaces and subroutines, which take process dependent properties into consideration and adjust them to the according application condition.