Abstract：Two rate control modes, i.e., Method A and Method B, are specified in the draft of GB/T 228, which are mainly divided into strain rate control based on extensometer feedback and strain rate estimated according to parallel length, that is, the beam separation rate obtained by multiplying the parallel length by the required strain rate. Two different rate control modes specified in the new standard GB/T 228 were employed to test the yield strength (specified non proportional elongation strength) of continuous yield and discontinuous yield specimens. The influence of rate control mode on the yield strength of materials was discussed. The results showed that the performance indexes of continuous yield specimens had no significant difference when adopting strain rate control and estimated parallel length strain rate control. For the discontinuous yield specimens, when ReH was not required, it could be controlled by strain rate or estimated parallel length strain rate. However, when ReH was required, it should be controlled by estimated parallel length strain rate.
徐雁，孙志鹏，宋祖峰. GB/T 228新标准速率控制模式对屈服强度的影响[J]. 物理测试, 2021, 39(4): 5-.
XU Yan,SUN Zhipeng,SONG Zufeng. Effect of rate control mode in new standard GB/T 228 on yield strength. PHYSICS EXAMINATION AND TESTING, 2021, 39(4): 5-.
2021, Vol. 39 
