Mechanical Property Of Fused Deposition Modeling Parts Of Acrylonitrile-butadiene-styrene(ABS) Material

3D printing technology is a commonly term for a series of rapid prototyping technology.Fused deposition modeling(FDM)has become the most widely used process in 3D printing technologies by virtue of its simple forming principle and cost economy.The mechanical properties of the forming parts mainly depend on the raw material and the printing parameters.In this paper,ABS(acrylonitrile-butadiene-styrene)plastics is used to fabricate parts.Printing parameters mainly include printing temperature,printing layer thickness,fiber width,fiber laying angle,printing direction and filling rate,etc.First,we used the design of experiment(DOE)to determine the functional relationship between the mechanical strength of FDM forming parts and the printing parameters(layer thickness,fiber width and fiber laying angle).It was found that the fiber laying angle affected mechanical strength of the parts significantly,while the layer thickness and the fiber width affected mechanical strength of the parts more complex.And when the filling rate reached 95%,the influence of each parameter on the strength of the parts could be ignored.Then,the macroscopic mechanical analysis of the forming parts is carried out by using the theory of composite material mechanics.In the state of plane stress,we applied the stress-strain relationship in any directions,to determine functional relationship between the elastic constants of the off-axis unidirectional forming parts and the elastic constants of the unidirectional parts in principal direction,and it has been verified by experiments.Finally,based on previous researches,we use the classical laminate theory(CLT)to establish the stiffness model of the forming parts,and predict the mechanical properties of different configurations.On the one hand,this paper uses statistical analysis method.On the other hand,the macroscopic mechanical analysis of the forming parts is carried out.This paper provides theoretical support for the directly manufacturing of functional products by using the FDM process.The applicability of the classical laminate theory to the prediction of mechanical properties of the FDM parts should be verified by more complete experiments.