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Title: A Life Prediction And Fatigue Characteristics Of Differential Gear Applied By Optimal Peening Condition
Author: Dong Sun Lee, Seong Kyun Cheong
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008088
Number of pages: 6
Abstract:
ABSTRACT
Experiments and fatigue analysis were accomplished to evaluate and predict the fatigue life of shot peened gear in this paper. The fatigue life was evaluated depending on
the peening intensity. From A-N (Almen intensity - Number of fatigue cycles) curve for a bevel gear, the specific time and velocity having a maximum fatigue life were
determined. Microscopic observation of crack surface was done through “Scanning Electron
Microscope : SEM”. Fatigue life of a peened gear was predicted by fatigue analysis.The result shows that the optimal peening condition is 65m/s of shot ball velocity and 8
minutes of shot peening time. An error range between experimental and fatigue analysis data is 20% to 25%. Predicted life data of unpeened and peened gear under load
2,200kgf are 4.46×106 and 1.0×1020 cycles, respectively. Optimal shot peening process
tremendously improves the fatigue life of a bevel gear. Life prediction technique using FEM is reasonable and makes us reduce the designing time and costs.
Keywords: Shot Peening, Life prediction, MSC_Fatigue, Optimal peening
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This page last revised: 03/22/2010