Analysis of the Stress and Strain Field of a Thin-Walled Pipeline with Penetrated Crack Using Numerical Simulation

Abstract:

The model of a thin-walled pipeline with penetration crack was built using the software of ANSYS; the model was meshed with shell elements and the singular point was set. As per the results of stress analysis, using the general post processor of ANSYS, the stress intensity factor was calculated based on the plane displacement extrapolation method and the result was compared with that calculated according to the theoretical formula. The characteristic dimension of the crack-tip plastic zone was calculated according to the numerical simulation and theoretical formula respectively. Results showed that the method for building the thin-walled pipeline model with penetration crack and analysis provided in this paper could accurately describe the crack-tip stress and strain field and thus widely be used for the failure analysis of pressure pipelines.

• Periodical: Applied Mechanics and Materials (Volume 394)
• Pages: 108-114
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.394.108
• Online since: September 2013
• Authors: Yu Guang Cao, Shuai Zhao, Shi Hua Zhang, Wei Han
• Keywords: Fracture Mechanics, Numerical Simulation, Penetration Crack, Thin-Walled Pipeline

References

[1] J.H. Pan: Fracture mechanics analysis of oil and gas pipeline (Petroleum Industry Press, Beijing 1989).

[2] J.C. Yue: Pressure pipeline technology, (China Petrochemical Press, Beijing 2000).

[3] J.F. Lin, D.X. Zhou: Defects evaluation of pressure capsules, (China Petrochemical Press, Beijing 1991).

[4] J. Shuai ,H. Zhang, K. Xu, in: Numerical Simulation of Crack Propagation in Gas Transmission Pipeline , Oil & Gas Storage and Transportation, (2004).

[5] Y. Liu, H.X. Meng, in: Crack Evaluation Method of Oil & Gas Pipelines, Oil & Gas Storage and Transportation, (2010).

[6] Y.W. Wang , Z. Lin, in: 3-D Simulation and Stress Intensity Factors Calculation of Surface Crack, China Offshore Platform, (2006).

[7] Abdulnaser M. Alshoaibi, Ahmad Kamal Ariffin, in: Finite element simulation of stress intensity factors in elastic-plastic crack growth. Journal of Zhejiang University - Science A, (2006).

DOI: 10.1631/jzus.2006.a1336

[8] Y.G. Cao,Q. Kong, K. Tian, in: Calculation of Stress Intensity Factors of Axial Cracks on Pressure Pipelines Using FEM Simulation, Oil Field Equipment, (2010).

[9] P. C . Paris, in: STP 381 Stress Analysis of Cracks, Fracture Toughness and Testing and its Applications, American Society for Testing and Materials, Philadelphia, (1965).

[10] A. Zahoor : Ductile Fracture Handbook. Palo Alto: Electric Power Research Institute, (1990): EPRI Research Project 1757-69.

[11] H.Z. Shan: Mechanics of Materials (Higher Education Press, Beijing 2004).