Timothy A. Philpot - Mechanics of materials _ an integrated learning system-John Wiley (2017)

Stress-concentration factor K
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
P
D
d
D
= 1.20
2r
d
P
= 1.30
= 1.50
1.4
r t = thickness
σ
K = max
1.2
, σ P
σ
nom=
nom
t d
1.0
0 0.05 0.10 0.15 0.20 0.25
D
d
Ratio r d
D
d
= 1.10
D
d
D
d
= 2.00
0.30
FIGURE 5.13 Stressconcentration
factors K for a
flat bar with opposite U-shaped
notches.
Stress-concentration factor K
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
t = thickness
P
P
D d
σ max
σ nom
K = , σ
P
nom =
t(D– d)
FIGURE 5.14 Stressconcentration
factors K for a
flat bar with a centrally located
circular hole.
2.1
2.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Ratio d D
Stress-concentration factor K
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
D
d
= 1.30
D
d
= 1.20
D
d
= 1.50
D
d
= 2.00
D
d
P
= 1.10
t = thickness
D
r
d
σ
K = max
, σ
σ nom = P
nom
t d
P
FIGURE 5.15 Stressconcentration
factors K for a
flat bar with shoulder fillets.
1.0
0 0.05 0.10 0.15 0.20 0.25
0.30
Ratio r d
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