The Mechanical Properties of Wood Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing
The Mechanical Properties of Wood Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing
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| Publisher | Chưa rõ |
|---|---|
| Accessible book producer | Public domain |
| Published year | 2004 |
| Coppy right | Chưa rõ |
PART I
THE MECHANICAL PROPERTIES OF WOOD
Introduction
Fundamental considerations and definitions
Tensile strength
Compressive or crushing strength
Shearing strength
Transverse or bending strength: Beams
Toughness: Torsion
Hardness
Cleavability
PART II
FACTORS AFFECTING THE MECHANICAL PROPERTIES OF WOOD
Introduction
Rate of growth
Heartwood and sapwood
Weight, density, and specific gravity
Color
Cross grain
Knots
Frost splits
Shakes, galls, pitch pockets
Insect injuries
Marine wood-borer injuries
Fungous injuries
Parasitic plant injuries
Locality of growth
Season of cutting
Water content
Temperature
Preservatives
PART III
TIMBER TESTING
Working plan
Forms of material tested
Size of test specimens
Moisture determination
Machine for static tests
Speed of testing machine
Bending large beams
Bending small beams
Endwise compression
Compression across the grain
Shear along the grain
Impact test
Hardness test: Abrasion and indentation
Cleavage test
Tension test parallel to the grain
Tension test at right angles to the grain
Torsion test
Special tests
Spike pulling test
Packing boxes
Vehicle and implement woods
Cross-arms
Other tests
APPENDIX
Sample working plan of United States Forest Service
Strength values for structural timbers
BIBLIOGRAPHY
Part I: Some general works on mechanics, materials of construction, and testing of materials
Part II: Publications and articles on the mechanical properties of wood, and timber testing
Part III: Publications of the United States Government on the mechanical properties of wood, and timber testing