Experimental Verification of the J Ic and Equivalent Energy Methods for the Evaluation of the Fracture Toughness of Steels
Experimental Verification of the J Ic and Equivalent Energy Methods for the Evaluation of the Fracture Toughness of Steels
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DOI：
10.1520/stp35555s
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
B. Marandet;G. Sanz
中科院分区：
文献类型：
--
作者：
B. Marandet;G. Sanz
在弹塑性范围内用一个小试样（紧凑拉伸或三点弯曲杆）测定了临界值J1 c和表观断裂韧度K B d。在加载过程中通过电位法检测起爆。对于本文所研究的钢（2.25Cr-1 Mo、电渣焊、锰铸钢），在转变温度范围内，由J1 c导出的K1 c值与厚试样直接测得的K1 c值一致。此外，等效能量法给出了与J积分法相同的结果。
The critical value J 1 c and the apparent fracture toughness K B d are measured with a single small specimen (compact tension or three-point-bend bar) loaded in the elastic-plastic range. Initiation is detected during loading by an electrical potential method. For the steels studied here (2.25Cr-lMo, electroslag weld, manganese cast steel), the K 1 c values deduced from J 1 c are in agreement with the K 1 c values directly measured with thick specimens in the transition-temperature range. Furthermore, the equivalent energy procedure gives the same results as those obtained by the J-integral method.