Experimental Investigation of Hardness and Impact Variability in Wooden Agricultural Equipment

Abstract

This study was conducted to determine the hardness testing and Impact testing of selected Timbers to be used in agricultural implements in Pantnagar, Udam Singh Nagar, between September 2015 and April 2016. The Rockwell hardness test is generally performed when quick and direct reading is desirable. The Rockwell hardness test was carried on the Digital Hardness testing machine on HRV-Scale. The impact strength of a material is determined with a Charpy or Izod impact test named after their inventors. the hardness of different types of timber, namely, Teak, Sal, Java plum, Eucalyptus, Yellow teak, North Indian Rose timber, red cedar, Mango, Margosa and Lebbeck was found to be 75.4, 79.1, 68.2, 69.1, 64.0, 87.1, 30.8, 63.2, 61.7 and 64.3 respectively. the Impact Strength of different types of timber, namely, Eucalyptus, Yellow teak, Teak, Lebbeck, Java plum, Mango, Red cedar, North Indian Rose timber, Margosa and Sal was found to be 49.2, 39.23, 56.71, 52.21, 46.3, 48.37, 49.2, 45.23, 41.6 and 58.89 KJ/m2 respectively. And their standard deviations were as follows: yellow teak (0.67), Red cedar (1.09), North Indian Rose timber (2.12), Teak (0.23), Lebbeck (7.95), Java plum (0.34), Eucalyptus (0.34), Margosa (0.71), Mango (0.87) and Sal (1.36) respectively. The timber of North Indian rose timber and Sal was found suitable for making Plankar, pulley and bearing block. The timber of North Indian rose timber, Sal and Eucalyptus was found best for making plough bottom.