Crack Propagation Analysis of Compression Loaded Rolling Elements

Crack Propagation Analysis of Compression Loaded Rolling Elements

WoS Article

The problem of crack propagation from internal defects in thermoplastic cylindrical bearing elements is addressed in this paper. The crack propagation in these elements takes place under mixed-mode conditions-i.e., all three possible loading modes (tensile opening mode I and shear opening modes II and III) of the crack are combined together. Moreover, their mutual relation changes during the rotation of the element. The dependency of the stress intensity factors on the crack length was described by general parametric equations. The model was then modified by adding a void to simulate the presence of a manufacturing defect. It was found that the influence of the void on the stress intensity factor values is quite high, but it fades with crack propagating further from the void. The effect of the friction between the crack faces was find negligible on stress intensity factor values. The results presented in this paper can be directly used for the calculation of bearing elements lifetime without complicated finite element simulations.

The problem of crack propagation from internal defects in thermoplastic cylindrical bearing elements is addressed in this paper. The crack propagation in these elements takes place under mixed-mode conditions-i.e., all three possible loading modes (tensile opening mode I and shear opening modes II and III) of the crack are combined together. Moreover, their mutual relation changes during the rotation of the element. The dependency of the stress intensity factors on the crack length was described by general parametric equations. The model was then modified by adding a void to simulate the presence of a manufacturing defect. It was found that the influence of the void on the stress intensity factor values is quite high, but it fades with crack propagating further from the void. The effect of the friction between the crack faces was find negligible on stress intensity factor values. The results presented in this paper can be directly used for the calculation of bearing elements lifetime without complicated finite element simulations.

fracture mechanics; crack propagation; stress intensity factor; thermoplastic material; bearing element; finite element method

fracture mechanics; crack propagation; stress intensity factor; thermoplastic material; bearing element; finite element method

DLHÝ, P.; PODUŠKA, J.; BERER, M.; GOSCH, A.; SLÁVIK, O.; NÁHLÍK, L.; HUTAŘ, P.

2022

01.05.2021

MDPI

BASEL

1996-1944

Materials

14

10

Swiss Confederation

2656-1

2656-24

24

https://www.mdpi.com/1996-1944/14/10/2656

http://hdl.handle.net/11012/202261

materials-14-02656