Crack length measurements with a potential drop method : A finite element simulation
(1993) In International Journal for Numerical Methods in Engineering 36(18). p.3205-3220- Abstract
A potential drop method, as used for estimations of crack lengths during three‐point‐beind experiments, is studied. The mechanical state is calculated using a finite element method. The deformed body obtained is used for a subsequent calculation of the electrostatic state. Calculations are performed for both two‐ and three‐dimensional models. The material is assumed to be elastic, linearly hardening plastic and electrostatically linear. Large deformations are considered. Further, the non‐linearity caused by the load, depending on the contact area between the cylinder on which the load is applied and the specimen, is considered. The increased contact area did not influence the mechanical state very much but had a direct impact on the... (More)
A potential drop method, as used for estimations of crack lengths during three‐point‐beind experiments, is studied. The mechanical state is calculated using a finite element method. The deformed body obtained is used for a subsequent calculation of the electrostatic state. Calculations are performed for both two‐ and three‐dimensional models. The material is assumed to be elastic, linearly hardening plastic and electrostatically linear. Large deformations are considered. Further, the non‐linearity caused by the load, depending on the contact area between the cylinder on which the load is applied and the specimen, is considered. The increased contact area did not influence the mechanical state very much but had a direct impact on the electrostatic state. The changes in the potential drop recordings due to deformation and electrical current passing through the load cylinder were shown to be considerable. The study explains, at least partly, the experimental observations. A more reliable registration of crack growth initiation is the main outcome of the analysis.
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- author
- Ke, Y. and Stahle, P. LU
- publishing date
- 1993-09-30
- type
- Contribution to journal
- publication status
- published
- subject
- in
- International Journal for Numerical Methods in Engineering
- volume
- 36
- issue
- 18
- pages
- 16 pages
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:0027666629
- scopus:84987044300
- ISSN
- 0029-5981
- DOI
- 10.1002/nme.1620361809
- language
- English
- LU publication?
- no
- id
- 504acc65-a195-400c-aef5-41a721565722
- date added to LUP
- 2019-11-30 00:43:08
- date last changed
- 2024-01-02 00:50:11
@article{504acc65-a195-400c-aef5-41a721565722,
abstract = {{<p>A potential drop method, as used for estimations of crack lengths during three‐point‐beind experiments, is studied. The mechanical state is calculated using a finite element method. The deformed body obtained is used for a subsequent calculation of the electrostatic state. Calculations are performed for both two‐ and three‐dimensional models. The material is assumed to be elastic, linearly hardening plastic and electrostatically linear. Large deformations are considered. Further, the non‐linearity caused by the load, depending on the contact area between the cylinder on which the load is applied and the specimen, is considered. The increased contact area did not influence the mechanical state very much but had a direct impact on the electrostatic state. The changes in the potential drop recordings due to deformation and electrical current passing through the load cylinder were shown to be considerable. The study explains, at least partly, the experimental observations. A more reliable registration of crack growth initiation is the main outcome of the analysis.</p>}},
author = {{Ke, Y. and Stahle, P.}},
issn = {{0029-5981}},
language = {{eng}},
month = {{09}},
number = {{18}},
pages = {{3205--3220}},
publisher = {{John Wiley & Sons Inc.}},
series = {{International Journal for Numerical Methods in Engineering}},
title = {{Crack length measurements with a potential drop method : A finite element simulation}},
url = {{http://dx.doi.org/10.1002/nme.1620361809}},
doi = {{10.1002/nme.1620361809}},
volume = {{36}},
year = {{1993}},
}