Failure And Life Analysis On Main Parts Of Armored Equipment

Separating ring of clutch and torsion axes which are easily damaged in tank arethe main research objects in this paper. Failure mechanism and life-prediction way tothem are investigated. Nonuniform wear is an important failure way for separating ring of tank. Athree-dimentional laser micrometer is used to measure abrasion loss, and then itsmechanism was investigated by means of micro-analysis combining with analysis ofservice conditions. Results proves that impact abrasive wear mechanism is a majorfactor for wear failure of the separating ring. Then a rational proposal was put forwardto improve the service life of the separating ring of clutch. Torsion axes are important parts in tank's suspension device. They are subjectedto random torsion loads, and then torsion deformation absorbing energy is produced.Random loads, tank's weight and residual stress after pre-twisted are applied totorsion axes, when tank is running. By numerical analysis, axes's stress distributionwas simulated respectively for 52 degree's pre-torsion, 48 degree's torsion and 16degree's torsion. Result shows that stress concentration does not occur in thetransition of axes and splines, and the maximal stress is located in the surface ofthin-diameter axes. On the basis of the above simulation, along with S-N curve of45CrNiMoVA steel which is used for the torsion axes and loads spectrum, fatigue lifeof torsion axes is predicted. Finally, pre-torsion's effect on torsion axes's load capacity and fatigue life isstudied. Result proves that it is very important and absolutely necessary for the designof torsion axes to be pre-twisted.