Evaluation of the Stress-Strain State at the Crack Tip in Casing Pipes Based on Numerical Simulation

被引：4
作者：
Zvirko, O. I. [1 ]
Lipec, S. [2 ]
Vengreniuk, O. I. [1 ]
Dzioba, I. [2 ]
机构：
[1] Natl Acad Sci Ukraine, Karpenko Physicomech Inst, Lvov, Ukraine
[2] Technol Univ, Kielce, Poland
来源：
MATERIALS SCIENCE | 2023年 / 58卷 / 04期
关键词：
casing; microstructure of steels; simulation of crack growth resistance; fracture mechanism; fracture toughness; FRACTURE; CORROSION; OIL;
D O I：
10.1007/s11003-023-00685-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution of local stresses and strains in a specimen in the vicinity of the crack tip in 50G and 32G2 casing pipe steels with different microstructure is obtained by simulating the stress-strain state at the crack tip and using numerical calculations. Steels are distinguished by atypical mechanical behavior: lower-strength 50G steel with a coarse-grained ferrite-pearlite structure is characterized by lower resistance to brittle fracture compared to 32G2 steel with a fine-grained bainite structure. The finite element method is used to simulate the specimen with a crack, and for calculations the true stress-strain curves of the steels are used. The calculation results confirm a higher susceptibility of the coarsegrained steel to crack propagation by brittle fracture.
引用
收藏
页码：460 / 465
页数：6
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