Fatigue assessment for combined HCF/LCF loading (CROSBI ID 485532)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Jelaska, Damir
engleski
Fatigue assessment for combined HCF/LCF loading
The closed form expression for estimation of the crack initiation life at combined HCF/LCF loading is derived, and the way of reshaping the crack growth rate formulae in the form enabling their use in fatigue design at non-stationary loading is demonstrated. This new derived formula suggests an additional damage increase when crossing from one stress block to another. It is proposed to call this effect as "block crossing effect". Herein, the reshaped crack growth rate formula is applied for the fatigue design of structures and components made of titanium alloy Ti-6Al-4V and subjected to combined HCF/LCF loading. For the stress history simplified in the way that it consists of one LCF stress block with number of cycles equal to number of start-up in-service operations, at load ratio r = 0, followed by one HCF stress block at load ratio r > 0 with summed-up all HCF cycles, the closed form expression is derived for estimating the crack propagation life at combined HCF/LCF loading.
crack initiation ; crack growth rate ; Block crossing effect
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
135-139.
2002.
objavljeno
10.1115/IMECE2002-32304
Podaci o matičnoj publikaciji
ASME Proceedings | Pressure Vessels and Piping
New Orleans (LA): American Society of Mechanical Engineers (ASME)
0-7918-3645-2
Podaci o skupu
ASME 2002 International Mechanical Engineering Congress and Exposition
predavanje
17.11.2002-22.11.2002
New Orleans (LA), Sjedinjene Američke Države