20.500.12556/RUL-160687 Function-based reconstruction of the fiber orientation distribution function of short-fiber-reinforced polymers Reconstruction of the fiber orientation distribution function (ODF) from injection molding simulation results is commonly performed using the so-called series-based approach. However, with the development of advanced material constitutive models, the need has emerged to overcome the drawbacks of this approach, such as negative values for certain orientation states and limitations in describing highly concentrated probabilities. In this work, an approach to shift the reconstruction procedure from series-based to function-based is proposed, achieved by deducing an appropriate two-parametric form of the ODF. We demonstrate that the proposed ODF can be uniquely reconstructed from the second-order orientation tensors obtained from the injection molding simulations and that the approach does not suffer from the aforementioned limitations, being capable of accurately describing even the extreme orientation states without yielding nonphysical results. Based on the proposed ODF, a new closure approximation is also developed and used to verify the deduced form in flow-induced orientation predictions. short-fiber composites material modelling injection molding fiber orientation distribution function closure approximation kompoziti s kratkimi vlakni porazdelitvena funkcija orientacije vlaken aproksimacija v zaprti obliki true false true Angleški jezik Slovenski jezik Članek v reviji 2024-09-03 14:51:20 2024-09-03 14:51:25 2026-01-26 10:47:58 0000-00-00 00:00:00 2022 0 0 32 str. iss. 1 Vol. 66 Jan. 2022 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 678.027.74:532.135 0148-6055 10.1122/8.0000358 89774851 Nabergoj,_Urevc,_Halilovic_-_Function-based_reconstruction_of_the_fiber_orientation.pdf Nabergoj,_Urevc,_Halilovic_-_Function-based_reconstruction_of_the_fiber_orientation.pdf 1 38B4BBF029F855180AA605308BE98732 b94dd8de10fe1bede87a15ea830a89cf74cb41d65095c714303cc91a8f7fbcbc 55099e4e-69f3-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189456 https://sor.scitation.org/doi/full/10.1122/8.0000358 Plačljiv dostop do polnega besedila 1 ff4d7374-69f2-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189455 Fakulteta za strojništvo 0 0 0