Crack propagation in biodegraded wood | Annals of Forest Science

EDPS Account

Volume 67 / No 7 (October-November 2010)

Ann. For. Sci., 67 7 (2010) 704

Full HTML

Free Access

Table II

Statistical values of properties (density, latewood %, weight loss and K_IC) after degradation, according to its duration.

	Douglas fir													Maritime pine

Time of	Density			Latewood			Weight			K_IC(MPa.m^1/2)				Density			Latewood			Weight			K_IC(MPa.m^1/2)
degradation				(%)			loss (%)										(%)			loss (%)

(days)	Mean	SD		Mean	SD		Mean	SD		Mean	SD	Toughness		Mean	SD		Mean	SD		Mean	SD		Mean	SD	Toughness
												loss (%)													loss (%)
0	0.60	0.034		41.6	5.70		0	0		0.28	0.031	0		0.58	0.031		29.0	6.67		0	0		0.42	0.071	0
4	0.56	0.029		33.9	5.26		0.49	0.15		0.23	0.031	18		0.61	0.027		37.1	6.27		0.43	0.14		0.42	0.053	0
7	0.57	0.017		38.7	4.46		0.22	0.084		0.20	0.046	29		0.62	0.048		37.6	5.14		0.85	0.78		0.34	0.048	19
11	0.58	0.036		39.5	7.01		0.43	0.38		0.24	0.038	14		0.63	0.042		39.2	7.05		0.74	0.67		0.37	0.051	12
14	0.58	0.033		42.1	5.21		0.64	0.59		0.22	0.042	21		0.62	0.066		34.4	9.54		1.95	0.81		0.31	0.066	26
18	0.59	0.033		41.5	7.45		0.95	0.70		0.24	0.041	14		0.60	0.060		29.2	7.39		2.06	1.03		0.32	0.10	24
21	0.55	0.26		37.7	9.48		1.21	0.96		0.25	0.048	11		0.62	0.082		37.0	9.70		2.40	1.31		0.28	0.057	33
25	0.56	0.042		41.9	9.78		2.61	1.94		0.20	0.052	29		0.60	0.057		32.5	7.03		3.78	2.05		0.30	0.072	29
28	0.58	0.031		44.0	5.57		2.00	1.51		0.21	0.034	25		0.60	0.074		33.5	6.55		6.32	4.00		0.25	0.11	40
32	0.58	0.050		43.4	8.57		2.73	2.56		0.22	0.034	21		0.62	0.095		32.8	10.7		5.83	2.82		0.27	0.082	36
35	0.57	0.029		44.8	9.98		2.81	2.62		0.22	0.049	21		0.56	0.071		35.5	9.12		9.63	4.48		0.18	0.080	57
39	0.54	0.023		37.9	3.64		2.67	2.29		0.22	0.032	21		0.57	0.076		33.5	5.56		9.50	5.62		0.21	0.083	50
42	0.55	0.027		35.4	5.20		2.30	1.76		0.24	0.041	14		0.53	0.041		34.7	9.73		10.85	3.02		0.20	0.059	52