The test bench is equipped with a resistance strain gauge in the teaching of material strength experiments, which can measure the distribution of normal stress along the height of the beam. Amplified loading with 1:20 leverage ratio, each weight is 10N, that is, the bending moment increment of 20Nm is obtained, and the maximum bending moment is 80Nm. The sample is a straight steel beam with a rectangular cross-section, 10 mm wide, 30 mm high, and 600 mm span. The body weight is about 8 kg.
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