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Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison
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| Zeitschriftentitel: | Polymer Engineering & Science |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Polymer Engineering & Science, 27, 1987, 18, S. 1390-1398 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
|
| Schlagwörter: |
| author_facet |
Wei, K. H. Nordberg, M. E. Winter, H. H. Wei, K. H. Nordberg, M. E. Winter, H. H. |
|---|---|
| author |
Wei, K. H. Nordberg, M. E. Winter, H. H. |
| spellingShingle |
Wei, K. H. Nordberg, M. E. Winter, H. H. Polymer Engineering & Science Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison Materials Chemistry Polymers and Plastics General Chemistry Materials Chemistry Polymers and Plastics General Chemistry |
| author_sort |
wei, k. h. |
| spelling |
Wei, K. H. Nordberg, M. E. Winter, H. H. 0032-3888 1548-2634 Wiley Materials Chemistry Polymers and Plastics General Chemistry Materials Chemistry Polymers and Plastics General Chemistry http://dx.doi.org/10.1002/pen.760271807 <jats:title>Abstract</jats:title><jats:p>A numerical method is described for calculating the stress a viscoelastic melt exhibits in a flow, based on approximate kinematics. The method assumes that the kinematics are reasonably close to those of a shear‐thinning fluid such as the Carreau model. The strain history of a given flow and the resulting stress are calculated via a tracking method from finite element kinematics. Fullfield flow birefringence experiments were done for lowdensity polyethylene and polystyrene flowing past a thin plate divider in a 1.254‐mm planar slit die. By digitally analyzing birefringence photographs of the flow field, the birefringence was measured over two dimensions. These birefringence results are in good agreement with birefringence fields calculated from the numerical simulations and the stress‐optical law. The flow fields were most highly oriented in a region surrounding the weld interface just downstream of the plate divider. This orientation relaxed farther downstream, with polystyrene relaxing faster than low‐density polyethylene.</jats:p> Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison Polymer Engineering & Science |
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10.1002/pen.760271807 |
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Wiley, 1987 |
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Wiley, 1987 |
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Wiley |
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Polymer Engineering & Science |
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| title |
Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_unstemmed |
Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_full |
Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_fullStr |
Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_full_unstemmed |
Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_short |
Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_sort |
simulation of planar welding flows: part 2. strain history, stress calculation, and experimental comparison |
| topic |
Materials Chemistry Polymers and Plastics General Chemistry Materials Chemistry Polymers and Plastics General Chemistry |
| url |
http://dx.doi.org/10.1002/pen.760271807 |
| publishDate |
1987 |
| physical |
1390-1398 |
| description |
<jats:title>Abstract</jats:title><jats:p>A numerical method is described for calculating the stress a viscoelastic melt exhibits in a flow, based on approximate kinematics. The method assumes that the kinematics are reasonably close to those of a shear‐thinning fluid such as the Carreau model. The strain history of a given flow and the resulting stress are calculated via a tracking method from finite element kinematics. Fullfield flow birefringence experiments were done for lowdensity polyethylene and polystyrene flowing past a thin plate divider in a 1.254‐mm planar slit die. By digitally analyzing birefringence photographs of the flow field, the birefringence was measured over two dimensions. These birefringence results are in good agreement with birefringence fields calculated from the numerical simulations and the stress‐optical law. The flow fields were most highly oriented in a region surrounding the weld interface just downstream of the plate divider. This orientation relaxed farther downstream, with polystyrene relaxing faster than low‐density polyethylene.</jats:p> |
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| author | Wei, K. H., Nordberg, M. E., Winter, H. H. |
| author_facet | Wei, K. H., Nordberg, M. E., Winter, H. H., Wei, K. H., Nordberg, M. E., Winter, H. H. |
| author_sort | wei, k. h. |
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| description | <jats:title>Abstract</jats:title><jats:p>A numerical method is described for calculating the stress a viscoelastic melt exhibits in a flow, based on approximate kinematics. The method assumes that the kinematics are reasonably close to those of a shear‐thinning fluid such as the Carreau model. The strain history of a given flow and the resulting stress are calculated via a tracking method from finite element kinematics. Fullfield flow birefringence experiments were done for lowdensity polyethylene and polystyrene flowing past a thin plate divider in a 1.254‐mm planar slit die. By digitally analyzing birefringence photographs of the flow field, the birefringence was measured over two dimensions. These birefringence results are in good agreement with birefringence fields calculated from the numerical simulations and the stress‐optical law. The flow fields were most highly oriented in a region surrounding the weld interface just downstream of the plate divider. This orientation relaxed farther downstream, with polystyrene relaxing faster than low‐density polyethylene.</jats:p> |
| doi_str_mv | 10.1002/pen.760271807 |
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| imprint | Wiley, 1987 |
| imprint_str_mv | Wiley, 1987 |
| institution | DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-D161 |
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| physical | 1390-1398 |
| publishDate | 1987 |
| publishDateSort | 1987 |
| publisher | Wiley |
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| recordtype | ai |
| series | Polymer Engineering & Science |
| source_id | 49 |
| spelling | Wei, K. H. Nordberg, M. E. Winter, H. H. 0032-3888 1548-2634 Wiley Materials Chemistry Polymers and Plastics General Chemistry Materials Chemistry Polymers and Plastics General Chemistry http://dx.doi.org/10.1002/pen.760271807 <jats:title>Abstract</jats:title><jats:p>A numerical method is described for calculating the stress a viscoelastic melt exhibits in a flow, based on approximate kinematics. The method assumes that the kinematics are reasonably close to those of a shear‐thinning fluid such as the Carreau model. The strain history of a given flow and the resulting stress are calculated via a tracking method from finite element kinematics. Fullfield flow birefringence experiments were done for lowdensity polyethylene and polystyrene flowing past a thin plate divider in a 1.254‐mm planar slit die. By digitally analyzing birefringence photographs of the flow field, the birefringence was measured over two dimensions. These birefringence results are in good agreement with birefringence fields calculated from the numerical simulations and the stress‐optical law. The flow fields were most highly oriented in a region surrounding the weld interface just downstream of the plate divider. This orientation relaxed farther downstream, with polystyrene relaxing faster than low‐density polyethylene.</jats:p> Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison Polymer Engineering & Science |
| spellingShingle | Wei, K. H., Nordberg, M. E., Winter, H. H., Polymer Engineering & Science, Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison, Materials Chemistry, Polymers and Plastics, General Chemistry, Materials Chemistry, Polymers and Plastics, General Chemistry |
| title | Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_full | Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_fullStr | Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_full_unstemmed | Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_short | Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| title_sort | simulation of planar welding flows: part 2. strain history, stress calculation, and experimental comparison |
| title_unstemmed | Simulation of planar welding flows: Part 2. Strain history, stress calculation, and experimental comparison |
| topic | Materials Chemistry, Polymers and Plastics, General Chemistry, Materials Chemistry, Polymers and Plastics, General Chemistry |
| url | http://dx.doi.org/10.1002/pen.760271807 |