magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
Povzetek
Cilj magistrske naloge je določitev natezne in dinamične trdnosti kompozitnih trakov iz ogljikovih vlaken, ki so proizvedeni s tehnologijo ciljnega nalaganja snovi. Konvencionalno proizvedeni CFRP trakovi so standardna komponenta v gradbeništvu in navtiki, kjer so pogosto izpostavljeni cikličnim obremenitvam. Zaradi visoke dinamične trdnosti so ogljikova vlakna izvrstna za tovrstne produkte in aplikacije, le malo pa je znanega o dinamični trdnosti in utrujanju kompozitnih trakov. Raziskava na to temo je potekala na inštitutu Empa (Švica), kjer smo kompozitne trakove ogljikovih vlaken AS4 in matrice PA12 proizvedli z metodo ciljnega nalaganja snovi. V sklopu raziskave smo določili parametre procesa naknadne obdelave in karakterizirali material. Rezultati so pokazali zadovoljivo dinamično trdnost kompozitnih trakov, ki pa je za 8 % nižja od dinamične trdnosti konvencionalno proizvedenih CFRP trakov. Obravnavali smo razloge in predlagali možne nadaljnje izboljšave.
Ključne besede
magistrske naloge;3D-tiskanje kompozitov;polimer ojačan z ogljikovimi vlakni;poliamid 12;kompozitni trak;karakterizacija materiala;natezna trdnost;dinamična trdnost;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2021 |
Tipologija: |
2.09 - Magistrsko delo |
Organizacija: |
UL FS - Fakulteta za strojništvo |
Založnik: |
[T. Vidrih] |
UDK: |
678.6:004.92:539.412(043.2) |
COBISS: |
78746883
|
Št. ogledov: |
204 |
Št. prenosov: |
1 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Fused filament fabrication and characterisation of CFRP tension straps |
Sekundarni povzetek: |
The focus of this research is the investigation of the fatigue behaviour of unidirectional 3D-printed continuous carbon fibre reinforced polymer (CFRP) tension straps with polyamide matrix. Conventionally produced tension straps are established components in the mechanical as well as the civil engineering sector (e.g. rigging systems for sailing boats, cranes and first bridges). All the structures mentioned above are subjected to high fatigue loads and although it is commonly reported that carbon fibre reinforced polymers show excellent fatigue resistance, there is limited understanding about the behaviour of CFRP loop elements under such loads, especially in combination with fretting at the attachment points. Research on this topic was performed at Empa in the past decade with thermoset CFRP straps, but never with 3D-printed continuous CFRP straps with thermoplastic matrix. Preliminary results are presented in this master thesis, which show that the fatigue endurance limit for investigated 3D-printed CFRP strap design is acceptable, when compared to steel tendons. However, it is still 8 % lower than conventionally produced CFRP straps using out-of-autoclave unidirectional carbon fibre prepregs. Reasons for this and potential future improvements are discussed. |
Sekundarne ključne besede: |
master thesis;3D-printing composites;carbon fibre reinforced polymer;polyamide 12;tension strap;material characterization;tensile strength;fatigue behaviour; |
Vrsta dela (COBISS): |
Magistrsko delo/naloga |
Študijski program: |
0 |
Konec prepovedi (OpenAIRE): |
2022-09-02 |
Komentar na gradivo: |
Univ. Ljubljana, Fak. za strojništvo |
Strani: |
XXVII, 79 str. |
ID: |
13366731 |