デービス棒とレーザ干渉計によるひずみゲージの動特性に関する研究 : 第1報,原理の確認

概要

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This paper proposes a novel technique for the characterization of strain gage dynamic response. The strain gage to be tested is glued on the side of a metal bar, which is called Davies' Bar. A projectile strikes one end of the bar and a pulse elastic wave is generated. The pulse passes through the gage and reflects at the other end of the bar. The reflection generates a very small transient displacement. The measurement of the displacement using a newly developed laser interferometer enables the derivation of the input transient strain to the strain gage using Skalak's analytical solution. Comparison between the input strain and the strain gage output gives the frequency characteristic of the strain gages. The experiment showed the phase lag and the insufficient sensitivity of gages in the transient response. Comparison with Oi's results gave a good agreement.
一般社団法人日本機械学会の論文
1993-03-25