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一、前言电液伺服试验机,是现代测定岩石面应力-应变全过程曲线的一个新的重要手段;它能依其闭环自动调节,克服载荷机架刚度的影响.目前,这种专用试验机尚处在试制阶段。 1981年9月我们同长江水利水电科学研究院岩基组合作,用我厂生产的PWS-20型电液伺服动静万能试验机(照片1),对石英闪长岩、大理岩、砂岩等柱形试样进行了抗压试验(照片2);绘出了一组相应的应力-应变全过程曲线(图1),对试验中所
I. INTRODUCTION Electro-hydraulic servo testing machine is a new important measure for the modern measurement of stress-strain curve of rock surface; it can be automatically adjusted according to its closed-loop to overcome the effect of load frame stiffness. Currently, this special testing machine It is still in trial production. In September 1981, we cooperated with the Rock Foundation Group of the Yangtze Institute of Water Resources and Hydropower Research and used the PWS-20 type electro-hydraulic servo dynamic and static universal testing machine (Photo 1) produced by our factory to treat quartz diorite, marble and sandstone columns. The test specimens were subjected to a compression test (Photo 2); a set of corresponding stress-strain curves for the entire process was plotted (Figure 1).