Fundamental Studies on Mechanical Properties of Long Grain Rice Varieties

I. Compressive properties of long grain rice

Abstract

Brown and milled rice kernels of two long grain indica varieties (IR 60, KDML 105) and two japonica varieties (Koshihikari, Nipponbare) were subjected to lateral contact-point compression under controlled atmospheric conditions of 20°C and 33.0-75.5% RH.
The results showed that the breaking load of long grain rice ranged from 51-128 N, and rupture occurred at a lateral deformation of 59-97μm. The modulus of elasticity varied from 3.3-8.6 GPa which was slightly higher than the value previously reported for longitudinal compression.