Experimental study and comparative numerical modeling of creep behavior of white oak wood with various distributions of earlywood vessel belt

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 3 Fitting parameters of Five-parameter model for the specimens with various distributions of earlywood vessel belt

Temperature (°C)	Sample code	β₁	β₂	β₃	β₄	β₅	R²
20	A	0.02009	− 1.66751	0.00178	0.00386	0.92857	0.99488
	B	0.01746	− 1.03732	0.00166	0.00205	0.94681	0.96900
	C	0.01274	− 0.93413	0.00071	0.00082	0.94286	0.92799
	D	0.01002	− 1.95205	0.00097	0.00224	0.95604	0.99811
40	A	0.02127	− 1.68162	0.00288	0.00621	0.92280	0.99029
	B	0.01901	− 1.57371	0.00286	0.00554	0.92944	0.99029
	C	0.01710	− 1.00274	0.00396	0.00403	0.94384	0.99799
	D	0.01632	− 0.78150	0.00219	0.00233	0.91761	0.99818
60	A	0.02501	− 1.40544	0.00237	0.00484	0.90517	0.99930
	B	0.02113	− 1.01594	0.00339	0.00533	0.88446	0.99900
	C	0.02044	− 1.70978	0.00223	0.00511	0.92322	0.99920
	D	0.01202	− 1.87526	0.00178	0.00440	0.92936	0.99930
80	A	0.02658	0.00261	0.35869	0.00755	0.31304	0.99999
	B	0.02295	− 0.28655	0.00833	0.00657	0.74727	0.99942
	C	0.02303	− 0.04828	0.01365	0.00820	0.49506	0.99928
	D	0.02107	− 0.32570	0.00530	0.00474	0.77182	0.99969