Strength value for the disc harrow working body contacting with an obstacle

Abstract

In operation approach to evaluating strength of the working organ of disk harrow in case of impact about a massive rigid barrier is provided. The task of determination of the intense deformed status of a composite construction (a spring stand and a disk) in case of impact loading has been considered by absolutely rigid body. The dynamic contact elastic task has been solved by finite element method in three-dimensional setting. In a contact zone in case of impact interaction of a disk with a massive body friction has been considered. The received distributions of relocation fields and the equivalent tension allow to judge strength of a working organ. The analysis of nature of fatigue failure of the tool has been carried out. Sections of a spring stand which confirm a pattern of origin and development of cracks as a result of accumulation of fatigue damages were specified. It brings to loss of durability in case of a critical overload (impact about a barrier).