Constraint in the failure assessment diagram approach for fracture assessment

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.2842121· OSTI ID:100887

Ainsworth, R A ^[1]; O`Dowd, N P ^[2]

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1. Nuclear Electric plc, Berkeley (United Kingdom). Berkeley Technology Centre
2. Imperial Coll. of Science, Technology and Medicine, London (United Kingdom). Dept. of Mechanical Engineering

This paper presents a framework for including constraint effects in the failure assessment diagram approach for fracture assessment. As parameters for describing constraint are still the subject of development, the framework is illustrated using both the elastic T-stress and the hydrostatic Q-stress. It is shown that constraint effects can be treated by modifying the shape of the failure assessment curves. In their simplest form, the modifications involve only two parameters: one quantifying the magnitude of structural constraint which depends on geometry and crack size; and the second quantifying the influence of constraint on fracture toughness.

• Sponsoring Organization: USDOE
• OSTI ID: 100887
• Journal Information: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 3 Vol. 117; ISSN 0094-9930; ISSN JPVTAS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CALCULATION METHODS
CRACK PROPAGATION
FAILURES
FRACTURE PROPERTIES
MATERIALS
MECHANICAL STRUCTURES
STRESSES