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Testing machines (1884)

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Testing machines (1884)

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    Available in PDF Format | Testing machines (1884).pdf | Unknown
    Arthur Vaughan Abbott
Excerpt from book: While having reference to the method employed for measuring the stress applied, they may be classed as lever, hydraulic scale or hydraulic gauge machines. These several classes will now be treated in their respective order. . GENERAL TESTING MACHINES. The machines under this class are those so planned as to make experiments on material in at least three or four different ways, as for example: machines arranged to make tests in tension, compression, transverse stress, and in shearing, bulging, punching and torsion. There are, however, very few machines in the country that aim to make tests in all of the above varieties of stress. Generally speaking, the investigations have been confined to tests made in tension, compression, transverse and shearing stress: while the appliances for torsion, bulging and punching are less frequently added. The classifications into horizontal and vertical machines simply depends upon the position that the specimen haswith reference to the machine. In a vertical testing machine the specimen is. placed vertically- Machines of this kind are to be preferred for many considerations, whenever the specimens are not over 5 or 6 feet in length, so as to render this method of construction feasible. In such cases the machine may be built small enough, so as to be placed in an ordinary room, and may be conveniently manipulated from- the floor : whereas, when the specimen exceeds the above length, a special building would be necessary: and when large and heavy specimens- are to be tested it is exceedingly difficult to handle and place them in the machine with requisite care. Vertical machines may be built of any capacity that may be desired: but of course in making experiments on short specimens it is rarely desirable to carry this capacity above 300,- 000 or...   show more
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Book details

  • PDF | 78 pages
  • Arthur Vaughan Abbott
  • General Books LLC
  • Unknown
  • 9
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