Draft Force Determination for Cultivator Shares with Different Mouth Structures Using The Finite Element Method

The most important dynamic parameter to be known in the design and optimization of soil tillage tools and machines is the draft force. Today, the draft force in soil cultivation tools and machines can be determined by different methods. These are experimental, analytical, and numerical methods. Among the numerical methods, especially the finite element method has been widely used in the design of soil tillage tools and machinery and in the estimation of the draft force. The use of the finite element method in the soil-machine relationship has provided great convenience and economy in the design, optimization, and evaluation of new equipment and machines. One of the important software used to define the soil-machine relationship is ANSYS. ANSYS has been used in this study because it is a powerful numerical software program that analyzes the soil-machine relationship using the finite element method and gives very close results by entering real soil parameters and boundary conditions into the simulation. In the study, shares with different mouth structures (flat, pointed and fork-shaped) that can be used for cultivators were used. The draft force values of shares at different operating speeds (1.5 m s-1 , 2.5 m s-1 , and 3.5 m s-1) were determined. There are buried soil models in ANSYS and the draft force values obtained with the cultivator shares were determined by using the Drucker and Prager model among these models. This model is stated as the best model representing the soil-machine relationship. It was determined that the draft force increased with the increase of the forward speed. However, it was determined that the fork share was less affected by the speed increase compared to the other shares. This situation has made this cultivator shares a more important position than the others. The highest draft force was found to be 1.64 kN with the flat share at a forward speed of 3.5 m s-1. The lowest draft force was found to be 0.39 kN with the fork share at a forward speed of 1.5 m s-1.

Journal

JOURNAL OF TEKIRDAG AGRICULTURE FACULTY-TEKIRDAG ZIRAAT FAKULTESI DERGISI

Year

2023

Volume

20

Issue

2

ISSN

1302-7050

eISSN

2146-5894

DOI

10.33462/jotaf.1087131

WoS UID

WOS:000991900000007