Table 3.

Physic–mechanical properties of used fibers [40,41,42,43].

Fibers	Density (g/cm3)	Diameter (µm)	Length (mm)	Tensile Strength (MPa)	Tensile Modulus (GPa)	Strain at Break (%)
Wood flour	1.3–2.2	300–500	-	44–90	6–13	2.0–3.0
Coconut shell	1.1–1.3	100	2.0	130–250	4–15	2.0–4.0
Basalt	2.7	13–22	3.2	2800–2900	70–110	2.5–3.5
Flax	1.40–1.45	50–70	1–65	400–1200	40–70	1.8–3.2