Paton Electric Welding Institute of те NAS of Ukraine
Publisher: lntemaiiorralAssocrarron «Welding:тылы/опа! <...> А|уозп1п
LLDiltey
GUan Dian
D. чип Hole
V.l.Lysak
N.l.Nikilorov
B,E.Paton
YaFilarczyk
цветам
G.A,Turichln
Zhang Yanmin
A.S.ZubchErIkD
(Russia)
(Germany)
(Chi па)
(Germany)
(Russia)
(Russia)
(Ukrain e)
(Poland)
(Germany)
(Russia)
(China)
(Russia)
Promotion mu :
длинами
мммроаащ
A.T.Zelnichenko (exec. director)
Transistors. <...> Selection of thermal conditions of welding
hardening steels of different structure classes HyabtseviA., Kondratiev IA, Gadzyr‘a N.F.. <...> Peculian‘ties of low-amperage argon-arc and
microplasma powder cladding on narrow substrate .. <...> NASU, Kiev, Ukraine
Considered is the procedure for estimation of growth of fatigue cracks in reinforcement of one-sided butt weld on a
longitudinal beam of freight flat car at the preset range of random cyclic loading. <...> However, the se
quence of application of ranges of such timeedependent
loads causes certain difficulties in estimation of the
development of fatigue cracks because of its substantial non-linearity with regard to geometric sizes of а
crack. <...> The study considers а surface (semielliptical) crack
(Figure 1), when its characteristic geometrical sizes
c and а grow according to equation (1) per cycleAN =
= 1 [l]:
2:
. k в ' rim
i
Figure 1. <...> Schematic of surface (semielliptical) crack in structure
element with thickness б loaded by membrane stresses a,“
'2 VJ MAKHNENKO and. “flu. <...> ROMANOVA. 2009
2
штативы/н.
:de = Сожги). if Щ > MM) (1 = a, c);
Щ (1)
W = 0. if AKi < Актов);
where AKl is the range of variations in stress intensity
factor КМ), respectively, at apex of the crack with
sizes с and a (see Figure 1):
AK: = KW!) — Iowa); <23
R = KW/ Т”; (3)
Co and т are the experimental characteristics of a material within the crack zone [1]; and AKth(R) is the
threshold value of КМ) obtained experimentally [1]. <...> The values of Ki““(f) and Юта) are found from
the known values given in [l] and from the other <...>