1527 KB37 KB199920252015Croccolo, DarioDe Agostinis, MassimilianoFini, StefanoLiverani, AlfredoMarinelli, NicoloNisini, EugenioOlmi, Giorgioštevilka:4letnik:61str. 227-236, SI 44ISSN:0039-2480COBISSID:13963291URN:URN:NBN:SI:doc-IG2H453CenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikdeformacijekompoziti z naravnimi vlaknilanmehanske lastnostinapetostiokolju prijazne smoleMechanical characteristics of two environmentally friendly resins reinforced with flax fibers|In this paper, a comparison between the mechanical characteristics of two different natural fiber composites has been carried out. The two composites were made using two different environmentally friendly resins, but with the same flax fiber reinforcement. Thirty-two specimens were tested for tension, bending and shear. The results obtained in the tensile and bending tests are acceptable according to the Standards, whereas those of the shear tests were discarded, since the samples exhibited unacceptable failure modes. In light of the results obtained, both in terms of strength and stiffness, the isophthalic resin (181EN2X) outperformed the vinyl ester resin (VEef220ST). In the case of the isophthalic resin, microscopic observations showed a good adhesion between the matrix and the fiber, with a small amount of air inclusions. The present study demonstrates that the mechanical characteristics of flax reinforced and environmentally friendly resins are similar to those achievable with the same fibers using conventional resinsČlanek podaja primerjavo mehanskih lastnosti dveh različnih kompozitnih materialov z naravnimi vlakni. Kompozita sta izdelana iz dveh različnih okolju prijaznih smol in ojačena z enakimi lanenimi vlakni. Prva (181 EN2X) je smola na bazi izoftalne kisline s 25 % polietilen tereftalata, pridobljenega iz recikliranega materiala. Druga (VEef220ST) je vinil ester, pridobljen iz bisfenolne epoksi smole z majhno vsebnostjo stirena. Ti dve smoli sta se uveljavili v pomorstvu zaradi visoke obstojnosti proti vplivom okolja, še posebej proti korozivnemu učinku slane vodeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo