Mechanical Properties of Fast-Growing Poplar Reinforced with Carbon Fiber

Table 3

Mechanical parameters of specimens with different carbon fiber ratios.

Specimen	fa (MPa)	S (standard deviation)	fk (MPa)		Ea (MPa)	Δa (mm)
Y1	22.84	2.593	17.38	—	1320	3.58
X1	27.74	1.509	24.56	1	1586	4.24
A1	35.69	3.27	28.81	1.1730	1564	4.47
A2	35.31	2.239	30.60	1.2459	1622	4.61
A3	34.42	2.767	28.60	1.1645	1508	4.80
A4	33.24	3.068	26.78	1.0904	1473	5.05
A5	31.59	2.15	27.07	1.1022	1291	5.73