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Official Journal of the Japan Wood Research Society

Table 7 Elastic constants of DOSB and DMDF measured by modal methods with different boundary conditions and static methods

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

Panel #

Elastic constants measured by dynamic method (MPa)

Elastic constants measured by static methods (MPa)

FFFF

SFSF

Panel bending

Strip bending

G xy

E x

E y

G xy

E x

E y

G xy

E x

E y

E x

E y

DOSB1

6438

4200

1760

6194

3909

1638

6141

4099

4785

2970

1716

DOSB2

6664

4701

1867

6325

4066

1557

6151

4430

4681

2867

1804

DOSB3

6768

4562

1843

6291

3734

1522

5908

3960

5253

3111

1672

DOSB4

6269

4158

1739

5514

4147

1782

5618

3877

4499

2646

1530

DOSB5

6418

4312

1743

6520

3715

1779

6231

4008

5073

2897

1814

Mean

6511

4387

1790

6169

3914

1656

6010

4075

4858

2898

1707

Diff. (%)

8.3

7.7

4.9

2.6

−3.9

−3.0

−19.2

−28.9

DMDF1

3207

3282

1343

2750

2812

1148

2772

2670

2599

2297

1128

DMDF2

2854

2790

1188

2611

2321

1046

2434

2440

2331

2022

1062

DMDF3

2715

2766

1180

2252

2305

1040

2392

2468

2259

2072

1050

DMDF4

2636

2564

1100

2420

2662

970

2208

2430

2170

1862

1107

DMDF5

2865

2796

1171

2456

2663

969

2394

2405

2279

2112

1069

Mean

2855

2840

1196

2498

2553

1035

2440

2483

2328

2073

1083

Diff. (%)

17.0

14.4

10.5

2.4

2.8

−4.5

−4.6

−16.5

  1. Diff. refers to the difference in percentage based on corresponding static value. DOSB and DMDF are short for double-thick oriented strand board, and double-thick medium density fiberboard, respectively. FFFF represents the boundary condition of all sides 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