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对五个钢号共计1492根试样进行拉力试验关于速度影响的观察结果得出,当应力增加速度不超过1.5公斤/毫米~2/秒时,对屈服点(σs)无影响;速度对不同的试验机有不同的效应,对摆锤式的影响大,扭力捧式影响小;还证明,对不经加工的螺纹钢,比经加工的试样影响大,而且不同的试验机(同是摆锤式的型号),虽然式样相同,但实验曲线并不完全一致。最后还证明,速度对拉力强度(σb)以及塑性(δ％,Ψ％)无影响。
A total of 1492 specimens of five steel grades were subjected to a tensile test. The observation of the effect of velocity showed that there was no effect on the yield point (σs) when the rate of stress increase did not exceed 1.5 kg / mm 2 / sec; Of the test machine has different effects, the impact of the pendulum-style, Torque impact is small; also proved that the unprocessed rebar, processed samples than the impact of large, and different testing machine (the same Pendulum model), although the same style, but the experimental curve is not exactly the same. Finally, it is also proved that the velocity has no effect on tensile strength (σb) and plasticity (δ%, Ψ%).