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Volume 27 Issue 2
Apr.  2006
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ZOU Guang-ping, WU Guo-hui. Equivalent K Conversion and Equivalent δ Conversion in Defect Assessment of Pressure Vessel[J]. Nuclear Power Engineering, 2006, 27(2): 22-25.
Citation: ZOU Guang-ping, WU Guo-hui. Equivalent K Conversion and Equivalent δ Conversion in Defect Assessment of Pressure Vessel[J]. Nuclear Power Engineering, 2006, 27(2): 22-25.

Equivalent K Conversion and Equivalent δ Conversion in Defect Assessment of Pressure Vessel

  • Received Date: 2004-12-24
  • Rev Recd Date: 2005-08-11
  • Available Online: 2025-07-29
  • Up till now,in the defect assessment standard of pressure vessel,a semi-experience method,equivalent K(stress intensity factor)conversion,usually used to deal with beried and surface three dimen-sional crack.In this paper,the method using elastic-plastic fracture parameter δ(crack tip opening displace-ment)to replace K(stress intensity factor)is first proposed,and equivalent K conversion in usual pressure vessel assessment is replaced by equivalent δ conversion,and equivalent K conversion and equivalent δ conversion is demonstrated in penny shaped crack.It is observed that the equivalent K conversion is conser-vative,and the equivalent δ conversion is more reasonable than the equivalent K conversion.

     

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