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《Journal of Hefei University of Technology(Natural Science)》 1984-03
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Yanh Lingyu Geng Jiongzhang  
In order to determine σ0.2 we often employ the following methods: 1) By using both the electronic deformation record apparatus and deformation issue apparatus; 2) By using bow displacement gage; or 3 ) By using YZV serial displacement gage.This article introduces the basic principles, the devices for test and the procedure of operation of the above-mentioned methods respectively . we believe that the first method is more accurate and rapid for measuring σ0.2, and more convenient and simple for operation. It could be applied as an appendix to the hyd-Univ testing machine, we have always considered it as one of the methods for rapid measurement of σ0.2.
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