Boots – shoes – and leggings
Patent
1983-02-22
1986-03-04
Krass, Errol A.
Boots, shoes, and leggings
73767, G01B 716
Patent
active
045743568
ABSTRACT:
An apparatus for automatically determining various stresses measured by a rectangular strain gage rosette. The apparatus receives signals from the rosette and provides signals representative of the maximum principal stress, the minimum principal stress and the maximum shear stress, the peak maximum principal stress, the minimum principal stress at the instant when the maximum principal stress is peaking, and the peak value of the shear stress. A first analog signal processor provides stress signals representative of the maximum principal stress, minimum principal stress and maximum shear stress for each instantaneous input signal amplitude from each arm of the strain gauge rosette, and a second signal processor receives the stress signals and provides output signals representative of the peak maximum principal stress, minimum principal stress at the instant of peak maximum principal stress, and peak maximum shear stress. Using the apparatus a designer of a vehicle or other apparatus normally subject to stress can observe the aforenoted stresses immediately during a test and either repeat the test of very slightly alter it to affirm the data or to detect subtle differences.
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The Strain Gage Primer, C. C. Perry & H. R. Lissner, 1962, McGraw Hill, Chapter 7, pp. 136-137.
Nat. Elec. Conf., Apr. 1951 (vol. 6), "Rosette Principal Strain Computer", C. M. Hathaway et al., pp. 295-307.
Matthews James R.
Schattschneider George K.
Elbaum Saul
Krass Errol A.
Lane Anthony T.
McDonald Thomas E.
Minister of National Defence of Her Majesty's Canadian Governmen
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