Effects of unloading of multiple necking in tensile bars
(2002) PACAM VII 9. p.213-216- Abstract
- The distribution of necks in slender structures obtained using high rate deformation often differs from the distribution obtained under quasistatic conditions. Initial thickness imperfections are often used to initiate necking at certain locations along a specimen surface. At sufficiently large deformation rates, necks may develop at sites that correlate weakly or not at all with the sites of the initial thin points. In the present study the time evolution of necks in round tensile bars with initial surface imperfections is visualized for a range of deformation velocities. The purpose of the study is to compare the necking patterns obtained using two different plasicity theories, J2-flow theory and J2-deformation theory. The effects of... (More)
- The distribution of necks in slender structures obtained using high rate deformation often differs from the distribution obtained under quasistatic conditions. Initial thickness imperfections are often used to initiate necking at certain locations along a specimen surface. At sufficiently large deformation rates, necks may develop at sites that correlate weakly or not at all with the sites of the initial thin points. In the present study the time evolution of necks in round tensile bars with initial surface imperfections is visualized for a range of deformation velocities. The purpose of the study is to compare the necking patterns obtained using two different plasicity theories, J2-flow theory and J2-deformation theory. The effects of unloading on multiple necking in tensile bars are of particular interest. In addition, results of simulations near the ideal-plastic limit are presented. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/776614
- author
- Nilsson, Kristina LU
- organization
- publishing date
- 2002
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- multiple necking, unloading, J2-flow theory, J2-deformation theory
- host publication
- Applied Mechanics in the Americas
- editor
- Kittl, Pablo ; Diaz, Gerardo ; Mook, Dean and Geer, James
- volume
- 9
- pages
- 4 pages
- publisher
- American Academy of Mechanics
- conference name
- PACAM VII
- conference location
- Temuco, Chile
- conference dates
- 2002-01-02
- ISSN
- 1523-2719
- language
- English
- LU publication?
- yes
- id
- c15bd235-b035-4c66-b93b-26759b75fcb9 (old id 776614)
- date added to LUP
- 2016-04-01 16:53:38
- date last changed
- 2020-03-18 16:03:22
@inproceedings{c15bd235-b035-4c66-b93b-26759b75fcb9,
abstract = {{The distribution of necks in slender structures obtained using high rate deformation often differs from the distribution obtained under quasistatic conditions. Initial thickness imperfections are often used to initiate necking at certain locations along a specimen surface. At sufficiently large deformation rates, necks may develop at sites that correlate weakly or not at all with the sites of the initial thin points. In the present study the time evolution of necks in round tensile bars with initial surface imperfections is visualized for a range of deformation velocities. The purpose of the study is to compare the necking patterns obtained using two different plasicity theories, J2-flow theory and J2-deformation theory. The effects of unloading on multiple necking in tensile bars are of particular interest. In addition, results of simulations near the ideal-plastic limit are presented.}},
author = {{Nilsson, Kristina}},
booktitle = {{Applied Mechanics in the Americas}},
editor = {{Kittl, Pablo and Diaz, Gerardo and Mook, Dean and Geer, James}},
issn = {{1523-2719}},
keywords = {{multiple necking; unloading; J2-flow theory; J2-deformation theory}},
language = {{eng}},
pages = {{213--216}},
publisher = {{American Academy of Mechanics}},
title = {{Effects of unloading of multiple necking in tensile bars}},
volume = {{9}},
year = {{2002}},
}