DETERMINATION OF WORKING DYNAMIC STRENGTH, DISTRIBUTION AND SIZE OF SPILLING AT CALCULATION OF RELIABILITY

Calculation of machine basic parts means to determine of calculation basic elements in the previous proceeding. It is working and critical stresses of parts, stress distribution, as well as, degree of overlapping the working and critical stresses. Working stresses of basic elements and their distribution are sizes which may be relative easy determined, as analytical so as experimental. However, determinations of distribution of critical stresses, spilling, as well as shape of distribution are very complicated if there is stochastic change of working stresses (working strength). By that, character of change of working stresses has essential impact on parameters of working dynamic strength. In this paper it was shown how model of calculation of working dynamic strength, it distributions, as well as interval of result spilling, can be established. Results of established model are shown for material steel by type P-18A as material which is often used for manufacturing basic machine parts. Such proceeding and results can be used at calculation of reliability