Rohrmüller, BenediktBenediktRohrmüllerHohe, JörgJörgHoheKärger, LuiseLuiseKärgerBeckmann, CarlaCarlaBeckmann2024-08-202024-08-202024https://publica.fraunhofer.de/handle/publica/473881Short-fiber reinforced composites are used in lightweight construction due to their numerous advantages: they have a high strength-to-weight ratio together with a low specific density and can be manufactured cost efficiently in complex geometries. Standard manufacturing technologies like injection-molding can be used. In this contribution, the material uncertainty of a short fiber reinforced composite material is investigated by mechanical characterization and multiscale simulations based thereon. The objective is to assess the propagation of uncertainties across the scales. Uncertainties in short-fiber reinforced composites can be caused by a scatter in the material properties but especially by a local variation in the fiber orientation and fiber density. Experimental results of mechanical testing showed a scatter of the mechanical properties inside a plate and between different plates. This scattering is mainly caused by the scattering of the fiber orientation. Microstructure generation and simulation enable the investigation of the local microstructure influence.enUncertaintiesMultiscale simulationProbabilistic assessmentShort fiber-reinforced polymersCompositesDDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaftenconference paper