The correlations between some mechanical properties
of natural fibres are shown in Figure 2. The Figures 2a to
2d show the stress-strain relationship for different fibres.
But the relationship for a particular fibre reported by
different researchers seems to be a little bit different in
these graphs, for example, compare stress-strain
relationship for coir fibre in Figure 2b (Munawar et al.,
2007), Figure 2c (Satyanarayana et al., 1990) and Figure
2d (Rao and Rao, 2007). Emphasis should be made to
develop typical curves, not only for stress-strain
relationship but also for other relationships. The variation
of tensile strength and Young's modulus with fibre
diameter is shown in Figure 2e and 2f, respectively. It can
be observed that both decreases with increasing fibre
diameter.