Plastic limit load analysis for pressure pipe with incomplete welding defects based on the extended Net Section Collapse Criteria

With von Mises yield criterion, the loading range of Net Section Collapse （NSC） Criteria is extended from combined tension and bending loadings to combined bending, torsion and internal pressure loadings. A new theoretical analyzing method of plastic limit load for pressure pipe with incomplete weld...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2010-06, Vol.11 (6), p.440-448
Main Authors: Jin, Zhi-jiang, Jiang, Cheng-hang, Wan, Xian-ping, Chen, Po, Wang, Xiao-fang
Format: Article
Language:English
Subjects:
Assessments
Bending
Circumferences
Civil Engineering
Classical and Continuum Physics
Collapse
Correlation analysis
Criteria
Curvature
Design engineering
Engineering
Finite element method
Industrial Chemistry/Chemical Engineering
Internal pressure
Mathematical analysis
Mechanical Engineering
Pipe
Plastic limit
Safety
Torsion
Weld defects
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:With von Mises yield criterion, the loading range of Net Section Collapse （NSC） Criteria is extended from combined tension and bending loadings to combined bending, torsion and internal pressure loadings. A new theoretical analyzing method of plastic limit load for pressure pipe with incomplete welding defects based on the extended NSC Criteria is presented and the correlative formulas are deduced, the influences of pipe curvature, circumferential length and depth of incomplete welding defects on the plastic limit load of pressure pipe are considered as well in this method. Meanwhile, according to the orthogonal experimental design method, the plastic limit loads are calculated by the finite element method and compared with the theoretical values. The results show that the expressions of plastic limit load of pressure pipe with incomplete welding defects under bending, torsion and internal pressure based on extended NSC criteria are reliable. The study provides an important theoretical basis for the establishment of safety assessment measure towards pressure pipe with incomplete welding defects.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.A0900459