University of Utah Mechanical Engineering Senior Design Project 2004
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Material Research for Core Construction

We are considering a wood core. These are some of the materials that we are considering.

Type

Specific gravity

MOE (GPa)

MOR (MPa)

Parallel (MPa)

Perpendiculur (MPa)

Hardness (N)

Shear (MPa)

ash

0.60

12.00

103.40

51.10

8.00

5871

13.17

maple

0.48

10.00

73.80

41.00

5.17

3781

11.93

oak

0.67

13.20

120.00

57.40

7.72

6227

13.00

douglas fir

0.51

13.44

85.49

49.85

5.52

3158

7.79

white pine

0.37

8.55

59.30

33.10

3.03

1690

6.20

source: http://www2.fpl.fs.fed.us/TechSheets/techmenu.html

specific gravity = ratio of density to density of water

MOE = Modulus of Elasticity

MOR = Modulus of rupture

Parallel, Perpendiculur = Strength under compression when loaded parallel or perpendiculur to grain

Hardness = resistance of a material to deformation, indentation, or scratching

shear = the application of stress from two opposite directions causing portions of an object to move in parallel but opposite directions

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