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用机械式仪器测量E和θ_(0.2)的传统静态法,技术要求高,费时且精度不够理想。要提高静态法的精度,关键在于改进测量变形的方法。我校研制的电阻式弓形变形传感器,自1975年以来反复使用证明,灵敏度和精确度高,稳定性好、使用方便。我们用这种传感器和载荷传感器,通过一般万能试验机、动态应变仪和函数记录仪,对十
The traditional static method of measuring E and θ_ (0.2) with a mechanical instrument is technically demanding, time consuming and less than ideal. The key to improving the accuracy of the static method is to improve the method of measuring the deformation. The resistive bow deformation sensor developed by our school has been proved to be used repeatedly since 1975, with high sensitivity and precision, good stability and easy to use. We use this sensor and load cell, through the general universal testing machine, dynamic strain gauge and function recorder, to ten