An Innovative Method of Preventing Bolt Hole Crack …
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1.2 Problem Statement
In the validation of wheels, Cornering Fatigue Test (CFT) plays an important role
in deciding the stiffness of the wheel. CFT will exactly simulate the loading effect
on the wheel, during vehicle turning conditions. In CFT, the wheel (For this project
forged single-piece aluminium wheel is used) will be fixed on the bottom flange and
bending moment will be applied to the disc, according to the load rating of the wheel
multiplied by its corresponding test factor (For test setup and loads ratings—SAE
J267 international standard is referred). In CFT of Aluminium wheels, crack above
the bolt hole region is the most common failure observed. To prevent this mode
of failure and to improve the fatigue life of the wheel further, Laser Peening (LP)
technique is used.
1.3 Wheel Used
Plenty of wheels are available with different sizes and materials in market. For this
project forged aluminium single-piece wheel (AA6061-T6 material grade) of 8.25
×
22.5
size was employed. This type of wheels basically used in commercial vehicles
such as trucks and buses (Fig. 2).
Fig. 2 Image of a forged aluminium wheel 8.25 × 22.5
429
1.2 Problem Statement
In the validation of wheels, Cornering Fatigue Test (CFT) plays an important role
in deciding the stiffness of the wheel. CFT will exactly simulate the loading effect
on the wheel, during vehicle turning conditions. In CFT, the wheel (For this project
forged single-piece aluminium wheel is used) will be fixed on the bottom flange and
bending moment will be applied to the disc, according to the load rating of the wheel
multiplied by its corresponding test factor (For test setup and loads ratings—SAE
J267 international standard is referred). In CFT of Aluminium wheels, crack above
the bolt hole region is the most common failure observed. To prevent this mode
of failure and to improve the fatigue life of the wheel further, Laser Peening (LP)
technique is used.
1.3 Wheel Used
Plenty of wheels are available with different sizes and materials in market. For this
project forged aluminium single-piece wheel (AA6061-T6 material grade) of 8.25
×
22.5
size was employed. This type of wheels basically used in commercial vehicles
such as trucks and buses (Fig. 2).
Fig. 2 Image of a forged aluminium wheel 8.25 × 22.5