Studies on Combined Drawn and Rotating Tillage Implements (IV)

Abstract

The estimated fatigue life and the calculated diameter of the main tilling transmisson shaft on the rotary and the combination tillage were analyzed by using the all peaks count method, the range count method and the full wave method for complex stresses. The conclusions were the following:
(1) For the fatigue life predictions of the tilling transmission shafting, the all peaks count method gave the longest estimated fatigue life and the range method gave the shortest of it.
(2) And then, for the frequency distribution analysis of working stresses of the tilling transission shafting, the full wave method gave the best predictions.
(3) It was possible that the shaft diameters of the tilling transmission shafting in the combination tillage were 0.62-0.73 times as large as that in the rotary tillage.