Abstract
Three-dimensional displacement fields in the neck propagation process in uniaxial tensile test of High Density Polyethylene (HDPE) and Polyethylene (PP) were evaluated by newly proposed Digital Image Correlation (DIC) method, called time-series netDIC. This method uses four images of specimen surface taken at two different times by two cameras for the identification of the three-dimensional displacements of measurement points. The displacement was obtained by minimizing the objective function, which is a summation of correlative coefficients of brightness distributions between two times and two cameras. Two cameras and a mirror were used to evaluate the three-dimensional displacement fields on both surfaces of plate-type specimen. Obtained results provided the quantitative information about degree of strain localization at the necked region of the specimen. Transverse strains in thickness and width directions were different for PP while those were almost same for HDPE. Furthermore, large positive volumetric strain was confirmed at necked region in inelastic deformation stage.
| Original language | English |
|---|---|
| Pages (from-to) | 1133-1145 |
| Number of pages | 13 |
| Journal | Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A |
| Volume | 78 |
| Issue number | 792 |
| DOIs | |
| Publication status | Published - 2012 |
| Externally published | Yes |
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Keywords
- DIC
- Non-uniform deformation
- Semi-crystalline polymer
- Three-dimensional
- Volumetric strain
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
Cite this
Three-dimensional evaluation of strain field during neck propagation process of semi-crystalline polymer by time-series net DIC. / Uchida, Makoto; Tanaka, Shohei; Kanagawa, Tomoya; Tada, Naoya.
In: Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 78, No. 792, 2012, p. 1133-1145.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Three-dimensional evaluation of strain field during neck propagation process of semi-crystalline polymer by time-series net DIC
AU - Uchida, Makoto
AU - Tanaka, Shohei
AU - Kanagawa, Tomoya
AU - Tada, Naoya
PY - 2012
Y1 - 2012
N2 - Three-dimensional displacement fields in the neck propagation process in uniaxial tensile test of High Density Polyethylene (HDPE) and Polyethylene (PP) were evaluated by newly proposed Digital Image Correlation (DIC) method, called time-series netDIC. This method uses four images of specimen surface taken at two different times by two cameras for the identification of the three-dimensional displacements of measurement points. The displacement was obtained by minimizing the objective function, which is a summation of correlative coefficients of brightness distributions between two times and two cameras. Two cameras and a mirror were used to evaluate the three-dimensional displacement fields on both surfaces of plate-type specimen. Obtained results provided the quantitative information about degree of strain localization at the necked region of the specimen. Transverse strains in thickness and width directions were different for PP while those were almost same for HDPE. Furthermore, large positive volumetric strain was confirmed at necked region in inelastic deformation stage.
AB - Three-dimensional displacement fields in the neck propagation process in uniaxial tensile test of High Density Polyethylene (HDPE) and Polyethylene (PP) were evaluated by newly proposed Digital Image Correlation (DIC) method, called time-series netDIC. This method uses four images of specimen surface taken at two different times by two cameras for the identification of the three-dimensional displacements of measurement points. The displacement was obtained by minimizing the objective function, which is a summation of correlative coefficients of brightness distributions between two times and two cameras. Two cameras and a mirror were used to evaluate the three-dimensional displacement fields on both surfaces of plate-type specimen. Obtained results provided the quantitative information about degree of strain localization at the necked region of the specimen. Transverse strains in thickness and width directions were different for PP while those were almost same for HDPE. Furthermore, large positive volumetric strain was confirmed at necked region in inelastic deformation stage.
KW - DIC
KW - Non-uniform deformation
KW - Semi-crystalline polymer
KW - Three-dimensional
KW - Volumetric strain
UR - http://www.scopus.com/inward/record.url?scp=84865965088&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84865965088&partnerID=8YFLogxK
U2 - 10.1299/kikaia.78.1133
DO - 10.1299/kikaia.78.1133
M3 - Article
VL - 78
SP - 1133
EP - 1145
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
SN - 0387-5008
IS - 792
ER -