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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 5 Paired-samples t test results of each elastic constant between dynamic and static test values

From: Comparative study on measurement of elastic constants of wood-based panels using modal testing: choice of boundary conditions and calculation methods

Material

Elastic constants

Paired group

Correlation

t

df

p (2-tailed)

OSB

E x

FFFF & static

0.174

7.879

19

0.000

SFFF & static

0.459

1.559

19

0.136

SFSF & static

0.099

4.371

19

0.000

E y

FFFF & static

−0.428

11.242

19

0.000

SFFF & static

−0.280

7.220

19

0.000

SFSF & static

−0.332

6.284

19

0.000

G xy

FFFF & static

0.220

−14.722

19

0.000

SFFF & static

−0.097

−8.744

19

0.000

SFSF & static

0.220

−14.722

19

0.000

MDF

E x

FFFF & static

0.351

5.482

19

0.000

SFFF & static

0.059

2.107

19

0.049

SFSF & static

0.467

4.196

19

0.000

E y

FFFF & static

0.520

1.147

19

0.266

SFFF & static

0.431

−7.245

19

0.000

SFSF & static

0.132

−2.068

19

0.053

G xy

FFFF & static

−0.065

−3.664

19

0.002

SFFF & static

−0.050

−4.678

19

0.000

SFSF & static

−0.128

−3.003

19

0.007

  1. df is short for degree of freedom. Sig. refers to the significance of paired-samples t test of each group. If sig. <0.05, there is significant difference between paired group at the 95% confidence level. The tests were performed using software SPSS 19.0. OSB and MDF are short for oriented strand board, and medium density fiberboard, respectively. FFFF represents the boundary condition of all sides free, SFFF represents the boundary condition of one side simply supported and the other three free and SFSF represents the boundary condition of a pair of opposite sides along minor strength direction simply supported and the other pair along major strength direction free
  2. Bold values are > 0.05
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