Observation and test apparatus for cavity evolution in test pieces under tensile impact and test method
A technology of test device and test method, which is applied in the direction of testing the strength of materials with one impact force, and achieves the effect of simple test method.
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[0022] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.
[0023] As shown in the figure, a test device for observing the evolution of voids in a specimen under impact tension includes micro-strain gauges symmetrically arranged on the two surfaces of the slat specimen 1, and the micro-strain gauges include two first micro-strain gauges 21 And 22 and two second micro-strain gauges 31 and 32, the slat test piece 1 includes a non-cavity cluster area 11 and a cavity cluster area 12 preset with a plurality of cavities 121, and the slat test piece 1 is fixedly installed in Between the input rod 41 and the output rod 42 of the Hopkinson pull rod device, the non-cavity cluster area 11 is close to the input rod 41, the cavity cluster area 12 is close to the output rod 42, and the two first micro strain gauges 21 and 22 are arranged in the non-cavity cluster area. In the cavity cluster area 11, two second micro-strain gauge...
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