Fatigue Analysis of Helical Spring Subjected to Multi-axial Load
383
Fig. 4 Mesh quality
ε n =
σ a
E
+
σ a
K
1
n
(13)
The relation between strain and the total life cycle is given as
ε n =
σ
f
E
2N f
b + ε
f
2N f
c
(14)
4.2 Fatigue Analysis
The flow chart is shown in Fig. 5 describes [10–12] the procedure for estimating the
fatigue life characteristics of helical spring.
5 Results and Discussion
The fatigue life of helical spring [13] obtained using theoretical calculation was 1.77E
+ 07 cycles, which will be compared with numerical simulation results. Table 4
shows the comparative evaluation of stress and strain life approaches. It is observed
that Max shear stress in the stress-life approach [14] obtained less error than other
approaches and hence it will be considered for evaluating the fatigue life of helical
spring.
The cross-section C-C [15] as shown in Fig. 6 is considered for examining the
strain and stress life of all the four types of numerical simulation approaches. It is
383
Fig. 4 Mesh quality
ε n =
σ a
E
+
σ a
K
1
n
(13)
The relation between strain and the total life cycle is given as
ε n =
σ
f
E
2N f
b + ε
f
2N f
c
(14)
4.2 Fatigue Analysis
The flow chart is shown in Fig. 5 describes [10–12] the procedure for estimating the
fatigue life characteristics of helical spring.
5 Results and Discussion
The fatigue life of helical spring [13] obtained using theoretical calculation was 1.77E
+ 07 cycles, which will be compared with numerical simulation results. Table 4
shows the comparative evaluation of stress and strain life approaches. It is observed
that Max shear stress in the stress-life approach [14] obtained less error than other
approaches and hence it will be considered for evaluating the fatigue life of helical
spring.
The cross-section C-C [15] as shown in Fig. 6 is considered for examining the
strain and stress life of all the four types of numerical simulation approaches. It is