Properties of hemp fibre polymer composites -An optimisation of ...

a
σ c/ρ c [10 3 m 2 /s 2 ]
b
Ec/ρ c [10 6 m 2 /s 2 ]
600
500
400
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100
60
50
40
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10
0
0
E-glass
Hemp yarn
P.rad.treated.hemp
Water retted hemp
Barley straw
0 20 40 60 80
P.rad.treated.hemp
Water retted hemp
Hemp yarn
E-glass
Barley straw
W f [% w/w]
0 20 40 60 80
W f [% w/w]
Figure 39. Composite stiffness (a) and composite strength (b) divided with composite
density. Measured values of σc, Ec, ρc and Wf are used as data points. The lines are
based on the model derived in Appendix D using ρf, ρm,αf, αm, nE and nσ from Table 7
and σf, σm(εcu), Em, and Ef from Table 8.Full lines for nE=nσ=0 and dotted lines for nE=1
and nσ=2.1 except for barley straw with nσ=1.
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