STATIC AND DYNAMIC PRESSURE EXERTED BY SILTY SOIL ONTO THE WORKING SURFACE OF A PLOUGHSHARE
Journal Title: Tribologia - Year 2012, Vol 246, Issue 6
Abstract
The values of soil pressure exerted onto the working surface of a ploughshare in its four points during ploughing loamy silt at two tillage speeds (0.355 and 1.955 m·s-1) were measured. It made possible, based on known Goriatchkin’s formula, the separation of the measured pressure from its components, i.e. the values of static and dynamic pressure. At working speed equal to 1.955 m·s-1, the highest value of soil pressure and its components occurred at the measuring point placed on the forepart of a ploughshare. In that point, the relative part of dynamic and static pressure in reference to total soil pressure was equal to 34% and 66%. At other measurement points, placed on the trapezoidal part of the ploughshare, the part of dynamic pressure was smaller and amounted to 24%, while its absolute value was many times smaller than the value in measuring point placed at the forepart of ploughshare.
Authors and Affiliations
Piotr Kostencki, Rafał Nowowiejski
Keywords
Related Articles
- EP ID EP270010
- DOI -
- Views 54
- Downloads 0
DETERMINATION OF MECHANISMS OF WEAR FOR ROLLING-SLIDING CONTACT IN SELECTED OPERATIONAL CONDITIONS BY MEANS OF SURFACE TOPOGRAPHY AND MES STUDIES
The paper presents the influence of selected operating factors, i.e. load, slip, and wear rate, and surface conditions. The wear mechanism between the cooperating rolling surfaces in the rolling/sliding combination varie...
TRIBOLOGICAL CHARACTERISTICS OF A GRAPHITE MODIFIED AL2O3 COATING IN SLIDING CONTACT WITH POLYMER COMPOSITES
The paper presents the tribological properties of Al2O3 coatings modified using graphite in a sliding contact with polymer composites. Ceramic-graphite upper surface layers formed on the aluminium alloy EN-AW-5251 using...
TRIBOLOGICAL WEAR OF POLYTHENE UHMWPE APPLIED IN BIOTRIBOLOGICAL SYSTEMS
The paper presents the results of the tribological tests for materials used in elements of hip and knee endoprostheses. The tests were conducted for a CoCrMo alloy and an ultra-high molecular weight polyethylene (UHMWPE)...
USE OF THE THEORY OF SIMILARITY IN THE STUDY OF CUTTING TOOL WEAR
The paper highlights the methods to define wear intensity of cutting tools using the theory of similarity. The dimensionless numbers of the cutting procedures, which are necessary in calculating cutting tool wear intensi...
Numerical analysis of the effect of backpull on tool wear in the process of wire drawing