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قراءة كتاب The Mechanical Properties of Wood Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing

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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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دار النشر: Project Gutenberg
الصفحة رقم: 4

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  • 39. Making a shearing test
  • 40. Impact testing machine
  • 41. Drum record of impact bending test
  • 42. Abrasion machine for testing the wearing qualities of woods
  • 43. Design of tool for testing the hardness of woods by indentation
  • 44. Design of tool for cleavage test
  • 45. Design of cleavage test specimen
  • 46. Designs of tension test specimens used in United States
  • 47. Design of tension test specimen used in New South Wales
  • 48. Design of tool and specimen for testing tension at right angles to the grain
  • 49. Making a torsion test on hickory
  • 50. Method of cutting and marking test specimens
  • 51. Diagram of specific gravity apparatus
  • TABLES
  • I. Comparative strength of iron, steel, and wood
  • II. Ratio of strength of wood in tension and in compression
  • III. Right-angled tensile strength of small clear pieces of 25 woods in green condition
  • IV. Results of compression tests across the grain on 51 woods in green condition, and comparison with white oak
  • V. Relation of fibre stress at elastic limit in bending to the crushing strength of blocks cut therefrom in pounds per square inch
  • VI. Results of endwise compression tests on small clear pieces of 40 woods in green condition
  • VII. Shearing strength along the grain of small clear pieces of 41 woods in green condition
  • VIII. Shearing strength across the grain of various American woods
  • IX. Results of static bending tests on small clear beams of 49 woods in green condition
  • X. Results of impact bending tests on small clear beams of 34 woods in green condition
  • XI. Manner of first failure of large beams
  • XII. Hardness of 32 woods in green condition, as indicated by the load required to imbed a 0.444-inch steel ball to one-half its diameter
  • XIII. Cleavage strength of small clear pieces of 32 woods in green condition
  • XIV. Specific gravity, and shrinkage of 51 American woods
  • XV. Effect of drying on the mechanical properties of wood, shown in ratio of increase due to reducing moisture content from the green condition to kiln-dry
  • XVI. Effect of steaming on the strength of green loblolly pine
  • XVII. Speed-strength moduli, and relative increase in strength at rates of fibre strain increasing in geometric ratio
  • XVIII. Results of bending tests on green structural timbers
  • XIX. Results of compression and shear tests on green structural timbers
  • XX. Results of bending tests on air-seasoned structural timbers
  • XXI. Results of compression and shear tests on air-seasoned structural timbers
  • XXII. Working

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