Effect of fisheye failure on material performance inducing error circle under high cycles

Abstract

In the engineering application of high strength steel and surface strengthening steel, fisheye failure is often happened in high cycle fatigue. To explore the effect of fisheye failure on high cycle fatigue properties of materials, a high cycle fatigue life model was established based on the Murakami and Tanaka’s fatigue strength models. The model introduces the error circle to evaluate fisheye size, and discusses the influencing factors of fatigue strength. The results show that the size and depth of fisheye failure will affect performance of materials. The proposed model considering the size and depth of defect quantitatively shows the influence of fisheye details on material performance, and effectively predicts the high/ultra-high cycle fatigue life.

An improved fatigue life model for mechanical components considering load strengthening characteristics

“…The sine wave type is selected according to relevant literature, and the loading frequency is 5 Hz. 32 Therefore, the MOT (Machine of Tester) vibration high frequency fatigue testing machine is used to conduct fatigue test research on the swing support rod. When predicting the fatigue life of mechanical parts, the S-N curve is usually measured when symmetrical cyclic loading, that is, the stress ratio R ¼ À1, and the average stress in the program load spectrum obtained based on the rain-flaw counting method is often not 0, the stress ratio is R ≠ À 1.…”

“…The choice of the waveform has little effect on the room temperature high cycle fatigue test. The sine wave type is selected according to relevant literature, and the loading frequency is 5 Hz 32 . Therefore, the MOT (Machine of Tester) vibration high frequency fatigue testing machine is used to conduct fatigue test research on the swing support rod.…”

Fatigue life prediction of eccentric springs for the automobiles considering residual stress

“…Fatigue failure caused by fractures and other reasons is extremely widespread, and it has always been a research hotspot and focus of domestic and foreign scholars. [1][2][3][4] Some scholars have studied the multiaxial [5][6][7] and high-low cycle [8][9][10] fatigue of materials. Combing the equivalent strain energy aspect for multiaxial fatigue analysis, Hao et al 11 developed a new damage parameter to predict multiaxial fatigue life.…”

Random fatigue life prediction of automobile lower arm via modified Corten–Dolan model

“…The current research on fatigue life is mainly divided into fatigue life research in the low cycle fatigue stage (number of stress cycles at material failure less than or equal to 10 5 ) and high cycle fatigue stage (number of stress cycles at material failure more than 10 5 ). [1][2][3][4] The fatigue life prediction, [5][6][7][8][9] fatigue damage mechanism, [10][11][12][13] and the influence of material manufacturing process on fatigue performance 14,15 for various materials have been a hot topic of research. The fatigue of mechanical components has also been a valuable topic.…”