Stochastic analysis of major physical properties of coconut fibre

Abstract

Distribution profile and inter-relation of major dimensional and mechanical property parameters of raw coconut fibre have been studied with the help of computerized statistical tool. Relations among the properties are evaluated using the best-fit transformation functions calculated through correlation coefficient. Four different types of defects have been identified and analyzed. All the properties are found to be asymmetric in nature and positively skewed. Diameter of a fibre varies along its length with tapering shape at both the ends. Three physical characteristics, namely length, diameter and linear density, are positively correlated among themselves and also with breaking load. They are negatively correlated with specific work of rupture in exponential manner. Flexural rigidity is positively correlated with diameter and linear density. No correlation has been observed for tenacity and elongation of fibre with length, diameter and linear density. Evaluation of length and diameter would be sufficient for quicker mode approximate assessment of quality (grading) for commercial grade coconut fibre lot.