20.500.12556/RUL-126688 Understanding the thermodynamic properties of the elastocaloric effect through experimentation and modelling This paper presents direct and indirect methods for studying the elastocaloric effect (eCE) in shape memory materials and its comparison. The eCE can be characterized by the adiabatic temperature change or the isothermal entropy change (both as a function of applied stress/strain). To get these quantities, the evaluation of the eCE can be done using either direct methods, where one measures (adiabatic) temperature changes or indirect methods where one can measure the stress-strain-temperature characteristics of the materials and from these deduce the adiabatic temperature and isothermal entropy changes. The former can be done using the basic thermodynamic relations, i.e. Maxwell relation and Clausius-Clapeyron equation. This paper further presents basic thermodynamic properties of shape memory materials, such as the adiabatic temperature change, isothermal entropy change and total entropy-temperature diagrams (all as a function of temperature and applied stress/strain) of two groups of materials (NiTi and CuZnAl alloys) obtained using indirect methods through phenomenological modelling and Maxwell relation. In the last part of the paper, the basic definition of the efficiency of the elastocaloric thermodynamic cycle (coefficient of performance) is defined and discussed. elastocaloric effect shape memory alloy superelasticity adiabatic temperature change isothermal entropy change COP elektrokalorični učinek zlitine z oblikovnim spominom superelastičnost true false true Angleški jezik Slovenski jezik Članek v reviji 2021-05-04 14:04:48 2021-05-04 14:04:49 2025-03-14 11:20:07 0000-00-00 00:00:00 2016 0 0 Str. 317-329 iss. 4 Vol. 2 Dec. 2016 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2016-11-28 697:621.577(045) Y508-7058 10.1007/s40830-016-0094-8 15128091 RAZ_Tusek_Jaka_2016.pdf RAZ_Tusek_Jaka_2016.pdf 1 4E8B74CBE2A61A0F0927BF5153D50D17 af4afc8be3181f92d7d82082417ec94657b5a96cf35e8030f77f772a74cd5e33 95de3a90-acd1-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=142747 http://link.springer.com/article/10.1007/s40830-016-0094-8 1 e732dfc1-acd0-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=142746 Fakulteta za strojništvo 0 0 0