LAUSR

Abstract Material Extrusion (ME) is a type of Additive Manufacturing (AM) process that creates parts by depositing polymer filaments in successive layers. The strength of ME products depends on both the cohesive strength between layers and between rasters. The raster gap is the most significant process factor affecting the strength of ME built parts. Standard tensile tests with a dog-bone shaped specimens are not suitable to determine the strength between layers of the ME built parts. A new model is introduced to predict the cohesive strength between layers using the true area of contact which can be obtained from the apparent values taken from mini three-point bending tests. The accuracy of the introduced model was verified by comparing its bending test results with different build parameters, the applicability and promise of the introduced model were confirmed.