The dynamic crack growth in a full-scale gas pipeline of API X80 steel is analyzed using the finite element method with the cohesive zone model. Based on the simulation, it is revealed that for the moderate steady-sta...The dynamic crack growth in a full-scale gas pipeline of API X80 steel is analyzed using the finite element method with the cohesive zone model. Based on the simulation, it is revealed that for the moderate steady-state crack growth, the crack-tip-opening angle strongly depends on the crack growth speed. In addition, the threshold initial crack sizes under different internal pressures are analyzed, which show a significant three-dimensional effect due to the wall thickness of the pipeline. The presented model offers a feasible way to study some details of the dynamic fracture of full-scale pipelines when tests are difficult or expensive.展开更多
基金support from the National Natural Science Foundation of China (Grant No.11302067, 11572140, 11302084)the Fundamental Research Funds for the Central Universities (Grant Nos. JUSRP115A09, JUSRP115A10)+7 种基金the Programs of Innovation and Entrepreneurship of Jiangsu Province, Primary Research & Developement Plan of Jiangsu Province (Grant No. BE2017069)Science and Technology Plan Project of Wuxi, the Fundamental Research Funds for the Central Universities (Grant Nos. JUSRP11529 and JG2015059)Postgraduate Research & Practice Innovation Program of Jiangsu Province(Grant No. KYCX17_1473)the Undergraduate Innovation Training Program of Jiangnan University of China (Grant No. 2015151Y)the Undergraduate Innovation and Entrepreneurship Training Program of China (201610295057)the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures (NUAA)(Grant No. MCMS-0416G01)"Project of Jiangsu provincial Six Talent Peaks" in Jiangsu Province"Thousand Youth Talents Plan"
文摘The dynamic crack growth in a full-scale gas pipeline of API X80 steel is analyzed using the finite element method with the cohesive zone model. Based on the simulation, it is revealed that for the moderate steady-state crack growth, the crack-tip-opening angle strongly depends on the crack growth speed. In addition, the threshold initial crack sizes under different internal pressures are analyzed, which show a significant three-dimensional effect due to the wall thickness of the pipeline. The presented model offers a feasible way to study some details of the dynamic fracture of full-scale pipelines when tests are difficult or expensive.
