20.500.12556/RUL-127202 Modelling of flexible adhesives in simple mechanical states with the use of the Darijani–Naghdabadi strain tensors and Kirchhoff–de Saint-Venant elastic potential Practical aspects of modelling of flexible adhesives with the energy conjugate measures of stress and strain of the Darijani–Naghdabadi (D-N) family are discussed. A possibility of description of materials exhibiting non-linear physical characteristics with the use of non-linear geometric relationships and linear elastic constitutive law is considered. Nominal stress vs. stretch relations are specified in cases of simple tension and simple shear with the use of the Kirchhoff–de Saint-Venant elastic potential and D-N energy conjugate stress and strain measures. Obtained theoretical estimates were compared with experimental results of simple tension and simple shear tests performed on Sika PM polyurethane (Cracow, Sika Poland). The deformation rate was fixed in order to minimize the influence of viscosity. Values of parameters α, β in the definition of the D-N strain tensor were optimized in order to provide good agreement between model predictions and experimental results. Observed discrepancies indicate that the proposed approach is not appropriate for constitutive modelling of the PM polymer. The presented approach is proposed to be used as a simple design model providing practical formulas describing the behavior of materials of non-linear characteristics in chosen mechanical states. Admissible values of exponents α, β are discussed regarding its bijectivity in a limited range of variation of principal stretches. generalized measures of strain nonlinear elasticity flexible adhesives posplošene mere deformacij nelinearna elastičnost podajna lepila true false true Angleški jezik Slovenski jezik Članek v reviji 2021-05-24 16:16:20 2021-05-24 16:16:24 2022-12-12 11:06:44 0000-00-00 00:00:00 2021 0 0 18 str. iss. 10, art. 1639 Vol. 13 2021 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 539.37 2073-4360 10.3390/polym13101639 64333827 RAZ_Szeptyński_Paweł_2021.pdf RAZ_Szeptyński_Paweł_2021.pdf 1 113E9C4B8B47BF5A9F2AE46048C488A6 52197ad3dd017f3608405af073c7d238ee3b54911e9ebad855cd4040548c578e 919fe7b4-a6c2-11ec-960c-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154693 https://www.mdpi.com/2073-4360/13/10/1639 0 70fb5739-a6c2-11ec-960c-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154692 Fakulteta za gradbeništvo in geodezijo 0 0 0