What are the material properties of wood?

Properties of Timber and Wood.

1. Color and Odor. Most trees are characterized by a typical color and odor.
2. Specific Gravity. Wood is a very light material, its specific gravity being always less than 1 (that of water).
3. Moisture Content. All woods are porous to some extent.
4. Grain.
5. Shrinkage and Swelling.
6. Strength.

What is the elasticity of wood?

The tables below show the values of Young’s modulus (modulus of elasticity) and Poisson’s ratio at room temperature for woods and composite materials used in engineering….Wood.

What is tensile strength in wood?

The tensile strength of soft- woods parallel to grain at 12% moisture content generally ranges between 70 to 140MPa. The compression strength is lower and is usually in the range 30 to 60 MPa. For hard- woods, these values are generally higher. These values are for clear, straight-grained wood samples.

What are the mechanical properties of timber?

Followings are the physical and mechanical properties of timber:

• Colour.
• Appearance.
• Hardness.
• Specific Gravity.
• Moisture Content.
• Grain.
• Shrinkage and Swelling.
• Strength.

What are the properties of structural wood products?

PROPERTIES OF WOOD AND STRUCTURAL WOOD PRODUCTS. 3.1 INTRODUCTION. Wood differs from other construction materials because it is produced in a living tree. As a result, wood possesses material properties that may be significantly different from other materials normally encountered in structural design.

How are the properties of wood related to each other?

Wood is an orthotropic material with unique and independent properties in different directions. Because of the orientation of the wood fibers, and the manner in which a tree increases in diameter as it grows, properties vary along three mutually perpendicular axes: longitudinal (L), radial (R), and tangential (T).

How are the longitudinal and tangential axes of wood related?

The longitudinal axis Lis parallel to the fiber (grain); the radial axis Ris normal to the growth rings (perpendicular to the grain in the radial direction); and 4–2 the tangential axis Tis perpendicular to the grain but tangent to the growth rings. These axes are shown in Figure 4–1. Elastic Properties

Why are the properties of wood parallel to the grain higher?

The properties of wood parallel to the grain are higher than those perpendicular to the grain, since the grain direction is also the direction of the primary Figure 1 Three principal axes of wood with respect to grain direction and growth rings. bonds of the major chemical constituents of the wood cellwall. 1.1 Elastic Properties