用示波冲击试验法测定动态强度值
MEASUREMENT OF OYNAMIC STRENGTH WITH OSCILLOSCOPIC IMPACT IEST
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摘要: 用示波冲击试验技术,在载荷-位移曲线上用图解法求得动态弯曲屈服强度σyd和最大弯曲强度理化检验理化检验σmax,进而求得解理断裂应力σf。实验结果表明,动态强度与静态强度的比值为1.25~1.30,利用此关系可以估算材料的低温抗拉强度值。Abstract: With the assistance of osoilloscopic impact technique,dynamic bending yield strength σyd and maximum behding yield strengih σmax were derived by the graphit method on the basis of loading-displacement curve,and then cleavage fracture stress σf was obtained accordingly. The test result showed that the ratio of dynamic strength and static strength is 1.25~1.30,by which the value of low temperature tensile strength of material could be evaluated.
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