TABLE 3-6 Typicala Static Strength, Type 110 Laminate

Laminate Augmentation:

None

Typical Density:

0.23 1b/in3 (0.637 g/cc)

Nominal Test Temperature:

66°-73°F (19°-23°C)

Veneer Specification:

GMS-003, BG-2+, transverse butt joints, 3-in stagger

Test Method:

Modified ASTM Standard D198-76. Specimens tested under load control to achieve constant rate of load increase from zero load to maximum load in approximately 5 minutes.

 

 

Maximum Stress at 8% w.m.c.d

Maximum Stress at 12% w.m.c.d

Test Directionb

Type of Testb

psi

MPa

psi

MPa

Longitudinal

Compression

9000

62.05

7200

49.64

Longitudinal

Tension

10,000

68.95

9400

64.81

Longitudinal

Shear, type 4c

1700

11.72

1600

11.03

Longitudinal

Shear, type 5c

1600

11.03

1500

10.34

Longitudinal

Elastic modulus

2.2 × 106

15.17 × 103

2.0 × 106

13.79 × 103

Tangential

Compression

2000

13.79

1600

11.03

Tangential

Tension

500

3.45

470

3.24

NOTES

a These typical properties represent a composite of laboratory test data from specimens having various moisture contents and uniformly stressed volumes ranging from 19.5 in3 to 194.0 in3 (319.5 to 3179 cc). Properties are representative of structures similar to small wind turbine blades. Larger structures are characterized by lower mechanical properties. Adjustments in properties due to size effects and other conditions are considered by Gougeon Brothers in engineering each application.

b See Figure 3-5 for illustration of stress directions.

c See Figure 3-5 for laminate shear orientations.

d Assumed wood moisture content.



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