20.500.12556/RUL-131530 Karakterizacija dinamične piezoupornosti struktur izdelanih z metodo ciljnega nalaganja The Characterisation of the Dynamic Piezoresistivity of Structures Manufactured by Fused Deposit Modelling Ciljno nalaganje kot eno izmed bolj dostopnih aditivnih tehnologij je že bilo uporabljeno za izdelavo piezoupornih statičnih/kvazistatičnih zaznaval deformacij, zračnih tokov, sile. Nedavne raziskave so pokazale, da bi bilo mogoče ciljno nalaganje uporabiti za izdelavo dinamičnih zaznaval. Zaradi vpliva številnih procesnih parametrov, nehomogenosti struktur, izdelanih s ciljnim nalaganjem, anizotropije in nizke ločljivosti tehnologije, je izdelava dinamičnih zaznaval trenutno omejena. V doktorskem delu je obravnavana dinamična piezoupornost s ciljnim nalaganjem izdelanih struktur z vidika kontinuuma. Zasnovana je eksperimentalna metoda za določitev dinamičnih koeficientov piezoupornosti, koeficienti pa so nato eksperimentalno določeni. Na podlagi pridobljenih informacij o piezoupornosti so nato definirani konstrukcijski principi za izdelavo piezoupornega pospeškomera izdelanega s ciljnim nalaganjem. S pomočjo konstrukcijskih principov je izdelan prototipni pospeškomer z majhnimi gabaritnimi merami, nizko križno občutljivostjo in 0-425\,Hz uporabnim frekvenčnim področjem. Fused filament fabrication, one of the most accessible additive manufacturing technology, has already been used to manufacture piezoresistive static/quasistatic strain sensors, force sensors and wind sensors. Recent research showed that fused filament fabrication could also be used for the manufacturing of dynamic sensors. However, the manufacturing of the dynamic sensors is currently limited due to the anisotropic mechanical and piezoresistive behaviour, the heterogeneity, the large number of process parameters and poor resolution of the fused filament fabrication technology. In the thesis dynamic piezoresistivity of fused filament fabricated structures is researched. Fused filament fabricated structures are treated as a continuum. An experimental method for the identification of dynamic piezoresistive coefficients is proposed. Piezoresistive coefficients are then determined using the proposed method. Acquiered knowledge about the piezoresistive behaviour of fused filament fabricated structures is adopted to define design principles for piezoresistive accelerometer. Prototype accelerometer based on the defined principles is manufactured. Prototype accelerometer has low cross-axis sensitivity, 0-425\,Hz useful frequency range and is low in size. piezoupornost pospeškomer ciljno nalaganje aditivne tehnologije dinamična zaznavala 3D printanje piezoresistivity accelerometer fused filament fabrication additive manufacturing dynamic sensors 3D printing true false false [M. Arh] Slovenski jezik Angleški jezik Doktorsko delo/naloga 2021-09-29 08:30:26 2021-09-29 08:30:28 2023-10-27 13:15:25 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXVIII, 116 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 537.311.3:004.925.84:621.79(043.3) 235224 79680003 11327.pdf 11327.pdf 1 98B311D034C2C4667F95E87873EE7CA2 b0c8bfdd2c5d45ecfd7174e099ced93abdda0d0eaf32ee4625a14fe18e24d06a 764d3d45-20ee-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=148883 Fakulteta za strojništvo 0 0 0