Elasto-Plastic Finite Element Modeling of Short Carbon Fiber Reinforced 3D Printed Acrylonitrile Butadiene Styrene Composites
Publication Name: JOM
Publication URL: https://link.springer.com/article/10.1007/s11837-019-03895-w#citeas
This research extends the existing classical lamination theory based finite element (FE) models to predict elasto-plastic and bimodular behavior of 3D printed composites with orthotropic material properties. Short carbon fiber reinforced acrylonitrile butadiene styrene was selected as the 3D printing material. Material characterization of a 3D printed unidirectional laminate was carried out using mechanical tests. A bimodular material model was implemented using explicit FE analysis to predict the tension and bending behavior of a 3D printed laminate. The results of the FE model predictions were experimentally validated. Hills yield function was effective at predicting the elasto-plastic stressstrain behavior of the laminate in tension. In bending, bimodular material behavior along with Hills yield function worked reasonably well in predicting the elasto-plastic bending of the laminate. The material model proposed can be used to predict the mechanical behavior of 3D printed parts with complex geometry under complex loading and boundary conditions.