Estimation of Novikov Gearing Loading Capacity Based om Integral Strain Gauges Application

Integral Strain Gauges Application for Gearing Reliability Estimation

“…[3].) obtained by electroplating and subjected to special heat and machine treatment [5,8,9,10,11,19,20]. The size of a source page for manufacturing ISG is 50х50 mm with the thickness of a foil 10 ...30 Micron.…”

“…The size of a source page for manufacturing ISG is 50х50 mm with the thickness of a foil 10 ...30 Micron. Depending on a material of the gauge, structure of electrolyte, parameters of electrolysis and term mechanical processing, and thickness of a foil, the sensitivity of gauges by the number of cyclic strains before appearance of response at given amplitude of cycles varies from several thousands up to several millions cycles [5,9,11,21]. In result of effect of cyclic loading, the structure of a material of the gauge changes and there is the response as "dark spots" on its surface [5,7,8,22].…”

“…The moment of appearance of the first "dark spots" and first grains of changed structure of a material of the gauge, and also their density and sizes correlate with number and amplitude of cycles. Besides described above, some other ways have been developed to estimate the ISG response [5,11,17,19]: by the value of relative square of changed structure, by the change of micro hardness, change of light stream reflected from a surface of the gauge or infra-red radiation.…”

“…Firstly, the problems originating from trials for fatigue of gear transmissions on stands should be considered. For such tests, an experimental and calculation method of an individual estimation of serviceability and life prediction of cylindrical gearing [5,11] (spur, helical, involutes, Novikov) was developed, which is based on the information obtained with ISG after short-term tests of gear box or its part under a load. The full procedure of implementation of the method consists of four main steps of operations.…”

“…Various means and tools are invented to monitor the internal state of the elements subjected to fatigue [6,7,8,9,10]. The most simple and cheapest means are based on the proposed technique of integral strain gauges (ISG), made of a metal foil with special properties, for the total examination and diagnosis of fatigue cumulative damage [11,12,13,14,15,16,17,18].…”