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An Improved Theoretical Process-Zone Model for Delayed Hydride Cracking Initiation at a Blunt V-Notch

Resource type
Date created
2018-01-30
Authors/Contributors
Author: Huang, Yifan
Abstract
Delayed hydride cracking (DHC) is an important concern for pressure tubes used in nuclear reactors. In this paper, an improved analytical process-zone model is developed based on the deformation fracture criteria. A V-notch with rounded root, which is widely adopted in mechanical testing of DHC, is considered and the proposed model includes the effect of both notch angle and tip radius. Comparisons with experiments show that the proposed model has a prediction accuracy closer to the current engineering process-zone model but with slightly less conservatism. The model is extended to account for plasticity and constraint effects at the flaw tip by introducing an empirical factor that depends on key material and geometric parameters.
Document
Published as
Huang, & Rajapakse. (2018). An improved theoretical process-zone model for delayed hydride cracking initiation at a blunt V-notch. Engineering Fracture Mechanics, 192, 262-275. https://doi.org/10.1016/j.engfracmech.2018.01.005
Publication title
Engineering Fracture Mechanics
Document title
An Improved Theoretical Process-Zone Model for Delayed Hydride Cracking Initiation at a Blunt V-Notch
Date
2018
First page
262
Last page
275
Publisher DOI
10.1016/j.engfracmech.2018.01.005
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
English
Member of collection
Download file Size
yifan-efm-fv.pdf 1.26 MB

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