| 单词 | impact test |
| 释义 | > as lemmasimpact test impact test n. any of various tests for measuring the resistance of a body to suddenly applied stress in which it is broken, usually by a blow, under standard conditions. ΘΚΠ the world > matter > physics > mechanics > force > stress or force exerted and tending to deform > [noun] > resistance to shear or breaking > specific test of resistance impact test1899 1899 W. C. Unwin Testing Materials of Construction (ed. 2) 239 (heading) Example of an impact test. 1915 J. J. Thomas in Proc. Amer. Soc. Testing Materials 15 62 The Charpy impact test appears to differentiate between steels of various degrees of brittleness. 1918 Machinery 31 Jan. 477/1 Tensile impact tests, in which a sudden tensile stress is applied to a specimen by means of a falling weight, have also been practised..in recent years. 1943 F. D. Jones Engin. Encycl. (ed. 2) II. 680 The torsion impact test breaks the specimen by twisting. 1971 B. Scharf Engin. & its Lang. iv. 24 The most common impact test in this country [sc. Great Britain] is the Izod test, in which a notched test piece fixed at one end is broken by a blow from a pendulum hammer, the energy absorbed in fracturing the specimen being recorded... Another method widely used in other countries and increasingly also in this country is the Charpy impact test, in which a notched test piece supported at both ends is broken by a blow from a striker, on the face opposite to and immediately behind the notch, the energy absorbed in fracturing the specimen being recorded. < as lemmas |
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