Chart 2.1 Stress concentration factors Ktn for opposite deep hyperbolic notches in an infinitely wide thin element in tension (Neuber, 1958).
h = Thickness
Chart 2.2 Stress concentration factors Ktg for an elliptical or U-shaped notch in a semi-infinite thin element in tension (Seika 1960; Bowie
1966; Baratta and Neal 1970).
Elliptical hole or
U-shaped slot in
an infinite thin element.
Major axis of elliptical hole
or U-shaped slot * 2t
Chart 2.3 Stress concentration factors Ktg and K1n for a tension strip with opposite semicircular
edge notches (Isida 1953; Ling, 1968).
Chart 2.4 Stress concentration factors Ktn for a flat tension bar with opposite U-shaped notches
(from data of Flynn and Roll 1966; Appl and Koerner 1969; Isida 1953; Ling 1968).
For semicircular notch (t/r = 1.0)
#/d = 1.15
(Isida 1953; Ling 1968)
HId = 2
0.1 0.2 0.3 0.4 0.5 d/H 0.6 0.7 0.8 0.9
Chart 2.5 Stress concentration factors K1n for a flat tension bar with opposite U-shaped notches (calculated using Neuber 1958 theory, Eq. 2.1),
r/H from 0.001 to 0.05.
Chart 2.6 Stress concentration factors K1n for a flat test specimen with opposite shallow U-shaped notches in tension (calculated using
Neuber 1958 theory, Eq. 2.1).
1% stress increase
Chart 2.7 Stress concentration factors Kta for a flat tension bar with opposite V-shaped notches
(from data of Appl and Koerner 1969).
Ktu - Stress concentration factor
for U notch (a = O)
Kta = Stress concentration factor
for corresponding V notch
Chart 2.8 Stress concentration factors Ktn for tension loading of a semi-infinite thin element with a deep hyperbolic notch, tension
loading in line with middle of minimum section (approximate values; Neuber 1958).
Chart 2.9 Stress concentration factors Ktn for a flat tension bar with a U-shaped notch at one side,
(from photoelastic data of Cole and Brown 1958). Tension loading