2026-06-27T14:04:38Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/56652021-11-02T12:04:41Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505

00925njm 22002777a 4500 dc Cuesta Segura, Isidoro Iván author Martínez Pañeda, Emilio author Díaz Portugal, Andrés author Alegre Calderón, Jesús Manuel author 2019-11 Additive manufacturing is becoming increasingly popular in academia and industry. Accordingly, there has been a growing interest in characterizing 3D printed samples to determine their structural integrity behaviour. We employ the Essential Work of Fracture (EWF) to investigate the mechanical response of polymer sheets obtained through additive manufacturing. Our goal is twofold; first, we aim at gaining insight into the role of fibre reinforcement on the fracture resistance of additively manufactured polymer sheets. Deeply double-edge notched tensile (DDEN-T) tests are conducted on four different polymers: Onyx, a crystalline, nylon-reinforced polymer, and three standard polymers used in additive manufacturing – PLA, PP and ABS. Results show that fibre-reinforcement translates into a notable increase in fracture resistance, with the fracture energy of Onyx being an order of magnitude higher than that reported for non-reinforced polymers. On the other hand, we propose the use of a miniature test specimen, the deeply double-edge notched small punch specimens (DDEN-SP), to characterize the mechanical response using a limited amount of material. The results obtained exhibit good alignment with the DDEN-T data, suggesting the suitability of the DDEN-SP test for measuring fracture properties of additively manufactured polymers in a cost-effective manner. 0264-1275 http://hdl.handle.net/10259/5665 10.1016/j.matdes.2019.107968 Essential Work of Fracture Deeply double-edge notched tensile specimen Small punch test Fused deposition modelling 3D printed polymer sheet The essential work of fracture parameters for 3D printed polymer sheets