Stress relaxation behavior of wood in the plastic region under indoor conditions

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Basic properties of materials and testing conditions

Designation of specimens	Dimension (mm)	Density (kg/m³)	MC (%)	Paraffin	Embedment size (mm)	Initial condition	Sensor	Delay days
A
20-P0.5	95 × 20 × 50	318	13.2	–	47 × 30	0.5 mm	SG	0
20-P1	95 × 20 × 50	321	12.7	–	47 × 30	1 mm	SG	0
20-P2	95 × 20 × 50	325	12.9^a	–	47 × 30	2 mm	SG	0
B
30-P1.5	200 × 30 × 45	358	9.5^b	○	30 × 45	1.5 mm	SG	650
45-P1.5	200 × 45 × 45	354	9.8^b	○	30 × 45	1.5 mm	SG	650
30-PE	200 × 30 × 45	358	9.5^b	○	30 × 45	2.2 MPa	SG	650
30-P1.6A	200 × 30 × 45	470	11.5^b	○	30 × 45	1.6 mm	SG	869
30-P1.6B	200 × 30 × 45	421	11.7^b	○	30 × 45	1.6 mm	SG	870
90-P1.6	200 × 90 × 45	403	12.4^b	○	30 × 45	1.6 mm	SG	870
C
30-FE	45 × 30 × 45	344	9.5^b	○	45 × 45	0.8 MPa	SG	636
D
L45-P2.3	240 × 45 × 45	329	9.7^b	–	Round washer OD: 32, ID: 13.5, T: 2.3	2.3 mm	LC	307

MC, moisture content; SG, strain gage; LC, load cell; OD, outside diameter; ID, inside diameter; T, thickness
^aAverage value of 20-P0.5 and 20-P1
^bObtained from the end-matched specimen, Paraffin: End of specimen is waterproofed by paraffin