Elastic-Plastic Analysis and Failure Assessment of the Pipeline Steel with Surface Crack

Abstract:

A detailed elastic-plastic analysis on different semi-elliptical surface crack geometries under uniaxial and biaxial load was conducted using 3D finite element analysis for pipeline steel X100. After quantitating fracture driving force J-integral and plastic yielding load, the effects of biaxial load and crack geometry were investigated by using the Option 3 of R6 failure assessment diagram approach for the surface cracks with the different crack sizes ( aspect ratios c/a = 1, 1.5 and 3 ) and the various biaxial loading ratios λ from -1 to 2. And three option curves of the R6 assessment were compared to evaluate the applicability of R6 assessment method for the X100 steel.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 2245-2248
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.2245
• Online since: December 2012
• Authors: Zhong Xian Wang, Rui Feng Zhang
• Keywords: Elastic-Plastic Analysis, Failure Assessment Diagram, Finite Element Method (FEM), Pipeline Steel, Semi-Elliptical Surface Crack

References

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[2] Xin Wang, Xiao Yu: Journal of ASTM International, Vol. 2 (2005), p.47.

[3] G. Tyson, W. R. Shen, A. Glover, etc.: Proceedings of the 4th International Conference on Pipeline Technology, Ostend, Belgium, Vol. 2 (2004), p.703.