The present paper aims to propose a method, in ISO Standard environment, in order to calculate the in-operation application factor KA in gears subjected to variable working conditions. In particular, this procedure, based on the Miner’s damage rule, allows to determine the application factors when the nominal torque is not defined and gears have been designed at least in a first phase (pitch diameters of both pinion and wheel have to be already known). So, a given load spectrum is processed in order to calculate a value of the equivalent tangential force that includes the variable amplitude effects; this force value is useful for pitting and bending calculation of the service life. A practical case is presented, based on a recorded vehicle mission, referring to the input gear of a transfer box for industrial truck. Obtained results in terms of in-operation KA factor values for pitting and bending fatigue have been compared to those calculated by means of the classical ISO Standard procedure, based on the corresponding experimental data.
|Titolo:||ISO Standard based method for calculating the in-operation application factor KAin gears subjected to variable working conditions|
|Data di pubblicazione:||2015|
|Digital Object Identifier (DOI):||10.1016/j.ijfatigue.2015.11.014|
|Appare nelle tipologie:||1.1 Articolo in rivista|