Compressive Behaviour of 3D-Printed PETG Composites

It is known that 3D-printed PETG composites reinforced with carbon or Kevlar fibres are materials can be suitable for specific applications in the aeronautical and/or automotive sector. However, this purpose, it necessary to understand their mechanical behaviour, which not yet fully understood terms of compression. Therefore, study intends increase knowledge domain, especially static as well regard creep and stress relaxation due inherent viscoelasticity matrix. In context, static, tests were carried out, compressive mode, using neat fibres. From tests, was found yield strength decreased both compared polymer. Values around 9.9% 68.7% lower found, respectively, when added PETG. Similar behaviour observed displacement, where a reduction 20.4% 46.3% respectively. On other hand, modulus increased by 12.4% matrix 39.6% Finally, revealed decrease stresses over time PETG, while response promoted greater displacement. situations, very dependent on displacement/stress level used at beginning test. polymer, higher relaxations displacements observed.