A real crack to be assessed in a RPV is generally a shallow crack subjected to biaxial far-field stresses. However, the fracture toughness Kc or Jc, which is an important material property for the structural integrity assessment of RPV containing cracks, are usually tested on deep cracked compact tension [C(T)] or single-edged bending [SE(B)] specimens under uniaxial loading. The fracture toughness data do not reflect the realistic biaxial loading state that the cracks are subjected to. Cruciform bending [CR(B)] specimen is therefore developed to simulate the biaxial stress state. In this paper, a series of finite element (FE) simulations of the CR(B) specimens containing different semi-elliptical cracks are conducted. Stress-strain curves of materials of different yield strength and hardening behavior reflecting the variation in the mechanical properties of RPV steels due to aging or temperature change are implemented into the finite element models. The J-A2 theory is applied to analyze the crack tip constraint. The results show that the biaxial effect is material property dependent and affected by load levels.
Skip Nav Destination
ASME 2018 Pressure Vessels and Piping Conference
July 15–20, 2018
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5167-8
PROCEEDINGS PAPER
Constraint Assessment for Cruciform Specimens With a Semi-Elliptical Crack
Yupeng Cao,
Yupeng Cao
Shanghai Nuclear Engineering Research and Design Institute, Shanghai, China
Search for other works by this author on:
Guian Qian,
Guian Qian
Chinese Academy of Sciences, Beijing, China
Search for other works by this author on:
Yinbiao He,
Yinbiao He
Shanghai Nuclear Engineering Research and Design Institute, Shanghai, China
Search for other works by this author on:
Yuh J. Chao
Yuh J. Chao
University of South Carolina, Columbia, SC
Search for other works by this author on:
Yupeng Cao
Shanghai Nuclear Engineering Research and Design Institute, Shanghai, China
Guian Qian
Chinese Academy of Sciences, Beijing, China
Yinbiao He
Shanghai Nuclear Engineering Research and Design Institute, Shanghai, China
Yuh J. Chao
University of South Carolina, Columbia, SC
Paper No:
PVP2018-84427, V06AT06A034; 7 pages
Published Online:
October 26, 2018
Citation
Cao, Y, Qian, G, He, Y, & Chao, YJ. "Constraint Assessment for Cruciform Specimens With a Semi-Elliptical Crack." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 6A: Materials and Fabrication. Prague, Czech Republic. July 15–20, 2018. V06AT06A034. ASME. https://doi.org/10.1115/PVP2018-84427
Download citation file:
25
Views
Related Proceedings Papers
Related Articles
Yield Strength Asymmetry Predictions From Polycrystal Elastoplasticity
J. Eng. Mater. Technol (April,1999)
Mechanical and Thermomechanical Elastic-Plastic Contact Analysis of Layered Media With Patterned Surfaces
J. Tribol (January,2004)
Local Mechanical Properties of a Magnesium Hood Inner Component Formed at Elevated Temperature
J. Eng. Mater. Technol (April,2010)
Related Chapters
A 3D Cohesive Modelling Approach for Hydrogen Embrittlement in Welded Joints of X70 Pipeline Steel
International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
Data Tabulations
Structural Shear Joints: Analyses, Properties and Design for Repeat Loading
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies