Naslov
Experimental determination of material mechanical properties and modeling of material behaviour in special environmental conditions

Autori
Brnić, Josip ; Vukelić, Goran

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 6th. European Conference on Computational Mechanics (Solids, Structures and Coupled Problems) ECCM 6 and 7th. European Conference on Computational Fluid Dynamics ECFD 7 / Owen, Roger ; de Borst, Rene ; Reese, Jason ; Pearce, Chris - Barcelona : International Center for Numerical Methods in Engineering (CIMNE), 2019, 4361-4367

ISBN
978-84-947311-6-7

Skup
6th European Conference on Computational Mechanics (ECCM 2018) ; 7th European Conference on Computational Fluid Dynamics (ECFD 2018)

Mjesto i datum
Glasgow, Ujedinjeno Kraljevstvo, 11.06.2018. - 15.06.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Constructional and Stainless Steels ; Mechanical Properties ; Material Behaviour

Sažetak
Modern design of the structure is based on the known material properties and high computer capacity. In this paper, constructional steel (42CrMo4 / AISI 4140 / 1.7225) and stainless steel (X46Cr13 / AISI 420 / 1.4034) have been experimentally tested. By means of experimental tests, their mechanical properties creep and fatigue behaviour were determined. All the mechanical properties are presented in the form of the curves representing temperature dependence. Mechanical tests related to mechanical properties include ultimate tensile strength, yield strength and modulus of elasticity. From the other hand, by uniaxial creep tests performed at different temperatures and stress levels material creep resistance has been determined. Short-time creep modelling is also presented. Fatigue limit (endurance limit) was determined by high cycle tensile tests at stress ratio of R=0.25. As fatigue life model is used stress-life model (σ-N →S-N, Wohler curve), where the ordinate (y-axis) covers maximal uniaxial stresses while apcisa (x-axis) covers number of cycles to failure. The mentioned stress-life model consists of two region and that fatigue finite life region and fatigue infinite life region, or, it can be said that, an inclined line and a horizontal line represent it. The so-called fatigue limit is defined by modified staircase method. As the results of the performed experimental investigations may be mentioned as follows. Tested materials have quite high ultimate tensile strength (20°C/1.7225/735 MPa ; 20°C/1.4034 /782 MPa) and yield strength (20°C/1.7225/593 MPa ; 20° /1.4034 /657 MPa ) while fatigue limit is of amount (1.7225/532 MPa ; 1.4034 /682 MPa).

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja, Strojarstvo, Temeljne tehničke znanosti

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