Mechanical Properties of Fast-Growing Poplar Reinforced with Carbon Fiber

Table 1

Design parameters of the specimens.

Specimen		Carbon fiber position	Carbon fiber ratio R (%)
Comparison	Y1	--	--
	X1	--	--
Carbon fiber ratio	A1	2-3, 5-6, 8-9	0.167
	A2	2-3, 5-6, 8-9	0.251
	A3	2-3, 5-6, 8-9	0.334
	A4	2-3, 5-6, 8-9	0.401
	A5	2-3, 5-6, 8-9	0.501
Carbon fiber position	B1	1-2, 5-6, 9-10	0.501
	B2	1-2, 2-3, 5-6, 8-9, 9-10	0.501

Note., R is the carbon fiber ratio, which is the ratio of the volume of the carbon fiber to the volume of the reinforced specimen; is the volume of the carbon fiber; is the volume of the specimen.