On the behavior of crack surface ligaments
(1998) In Nuclear Engineering and Design 184(1). p.145-153- Abstract
- Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable... (More)
- Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed. (Less)
- Abstract (Swedish)
- Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable... (More)
- Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed. (C) 1998 Elsevier Science S.A. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5a4d3307-748f-48d6-a863-4978e602309c
- author
- Nilsson, P. ; Ståhle, P. LU and Sundin, K. G.
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nuclear Engineering and Design
- volume
- 184
- issue
- 1
- pages
- 9 pages
- publisher
- Elsevier
- external identifiers
-
- wos:000075803000012
- scopus:0346362871
- ISSN
- 0029-5493
- DOI
- 10.1016/s0029-5493(98)00160-5
- language
- English
- LU publication?
- no
- additional info
- Nilsson, P Stahle, P Sundin, KG Pressure Vessels and Piping Conference of the American-Society-of-Mechanical-Engineers Jul 23-27, 1995 Honolulu, hawaii Amer Soc Mech Engineers Stahle, Per/J-3590-2014
- id
- 5a4d3307-748f-48d6-a863-4978e602309c
- date added to LUP
- 2019-06-25 19:32:34
- date last changed
- 2022-02-15 21:47:02
@article{5a4d3307-748f-48d6-a863-4978e602309c,
abstract = {{Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed.}},
author = {{Nilsson, P. and Ståhle, P. and Sundin, K. G.}},
issn = {{0029-5493}},
language = {{eng}},
number = {{1}},
pages = {{145--153}},
publisher = {{Elsevier}},
series = {{Nuclear Engineering and Design}},
title = {{On the behavior of crack surface ligaments}},
url = {{http://dx.doi.org/10.1016/s0029-5493(98)00160-5}},
doi = {{10.1016/s0029-5493(98)00160-5}},
volume = {{184}},
year = {{1998}},
}