Ultrasound and Wood Science at the Forestry Research Centre in Nancy, France, for a period of twenty years, between 1979 and 1999

Topical Issue - Development of European Acoustics in 20th Century

Open Access

Table 5.

Comparation between the technical constants for Sitka spruce wood at 12% moisture content using ultrasonic (1 MHz) and static tests [22].

Test	Technical constants (10⁸ N/m²)						Poisson ratios
	Young’s moduli			Shear moduli			Plane LT		Plane LR
	E_L	E_R	E_T	G_RT	G_LT	G_LR	ν_LT	ν_TL	ν_LR
Static	90.5	8.17	4.03	–	–	–	0.057	0.029	0.438
Ultrasonic	96.64	10.37	4.87	0.91	10.95	11.96	0.045	0.049	0.430
Differences %	+6.7	+26.9	+20.8				−21.0	+68.9	−1.8

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