The Effect Of Sensitivity Of Sub Surface Fatigue Cracks During Service Stage Of Gears

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The Effect Of Sensitivity Of Sub-Surface Fatigue Cracks During Service Stage Of Gears R.Vyjayanthi ,Dr.B.Venkatesh Department of mechanical engineering Vardhaman College of engineering India, Hyderabad, 500070 Vyjayanthi8@Gmail.Com Abstract—Gears are one of the most critical components in mechanical power transmission systems. Gear failures occur due to defect formation during manufacturing and service stage of gear .Mostly failures during service stage of gear show major effect on the component. Development in technology evaluated a new technique of inspection called Non-destructive testing technique to detect and characterize such defects and anomalies in the component, and also ensuring pre-service quality and monitoring in-service degradation to avoid pre-mature failure of the component. In this paper sub-surface fatigue crack that occur most commonly during service stage, ultrasonic inspection for finding sensitivity of crack in gears and its effects on life of gear during service stage is discussed. Keywords—sub-surface fatigue crack; ultrasonic inspection; Sensitivity of flaw;effects. I. INTRODUCTION The field of non-destructive testing (NDT) is a very broad, interdisciplinary field that plays a critical role in assuring that structural components and systems perform their function in a reliable and cost effective manner [4]. NDT techniques are used to locate and characterize material conditions and flaws that cause major damages to the systems and components.

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