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0
0.02
0.04
0.06
0
5 10 15 20 25 30
Crack length
a
[mm]
Deformation [mm]
Maximal deformation
A
deformation
B
deformation
0
0.01
0.02
0.03
0
5 10 15 20 25 30
Crack length
a
[mm]
dC/da
0.02 [cm/kN]
a) deformation change with crack length (
A
,
B
)
b) increment of the element compliance (
dC/da
)
0
20
40
60
0
10
20
30
Crack length
a
[mm]
Stress [kN/cm
2
]
σ
x
σ
y
τ
xy
σ
eq
0
20
40
60
80
100
0
5
10 15 20 25 30
Crack length
a
[mm]
Percent
σ
τ
c) stress distribution (
σ
x
,
σ
y
,
τ
xy
,
σ
eq
)
d) stress portions (
σ
/
τ
and
σ
/
τ
mem
/
σ
/
τ
bend
)
12
14
16
18
20
22
0
5 10 15 20 25 30
Crack length
a
[mm]
Deformation energy, [kNcm]
0
2
4
6
8
10
0
5 10 15 20 25 30
Crack length
a
[mm]
Increase of deformation
energy [kNcm/mm]
e) deformation energy change,
E
d
f) deformation energy increment (
dE
d
/da
)
10
15
20
25
30
35
0
5
10 15 20 25 30
Crack length
a
[mm]
Deformation energy [%]
1. row
2. row
3 row
4. row
5. row
0
0,1
0,2
0,3
0
5
10 15 20 25 30
Crack length
a
[mm]
Deformation energy
on crack tip [kNcm]
g) deformation energy change in zones
h) deformation energy on crack tip
Figure 2. Dependence of cracked plate parameters on crack length
280