Effects of mechanical heterogeneity on plastic zones of welded three-point bend specimens

In this paper an elastic–plastic finite element method has been utilized to compute the evolution of the plastic zones in welded three-point bend specimens. The investigation includes the effects of the crack depth, strength mismatching, weld width and crack location on the plastic-zone evolution at...

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Bibliographic Details
Published in:The International journal of pressure vessels and piping 1998-06, Vol.75 (7), p.575-580
Main Authors: Xue, H.E., Shi, Yaowu
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fracture mechanics, fatigue and cracks
Fundamental areas of phenomenology (including applications)
Measurement and testing methods
Measurement methods and techniques in continuum mechanics of solids
Physics
Plastic zone
Solid mechanics
Strength mismatching
Structural and continuum mechanics
Three-point bending test
Welded joint
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Summary:In this paper an elastic–plastic finite element method has been utilized to compute the evolution of the plastic zones in welded three-point bend specimens. The investigation includes the effects of the crack depth, strength mismatching, weld width and crack location on the plastic-zone evolution at the crack tip. The main results indicate that the strength mismatching and geometry of the welded specimens have evident effects on the evolution of the plastic zones. The crack growth driving force curve and material fracture toughness may be affected during three-point bending tests.
ISSN:0308-0161
1879-3541
DOI:10.1016/S0308-0161(98)00057-X