Research Information System
International Journal of 3D Printing Technologies and Digital Industry, vol.6, no.3, pp.382-391, 2022 (Peer-Reviewed Journal)
Polyethylene terephthalate (PET) material, universally used in the packaging industry due to its thermal
and mechanical properties, high chemical resistance, and low gas permeability, is among the most
widely used polymer materials worldwide. These properties have made their use in additive
manufacturing methods widespread. Determining how some common additive manufacturing defects
affect the products produced by these methods will increase the adoption of these technologies in final
production. In this study, the effect of layer non-joining defect called delamination on the impact
strength of PET material produced by additive manufacturing method at different layer thicknesses was
carried out experimentally and numerically. The effects of flexural stress on the artificially created layer
adhesion defect on the middle layers of the parts produced and modelled with a layer thickness of
0.1/0.2/0.3 mm were investigated. It has been discovered that the increase in layer thickness decreases
flexural strength. In addition, while the flexural strength of the specimens containing delamination
decreased, the growth in layer thickness accelerated this decrease.