Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene
Isotactic polybutene-1 (i-PB1) is a polymer used for the manufacturing of pressurized pipes. In this work two grades of i-PB1 with a different degree of isotacticity have been investigated; they have been supplied by Basell Polyolefins. Fracture tests have been performed at various temperatures a...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2013-04-01
|
| Series: | Fracture and Structural Integrity |
| Online Access: | https://212.237.37.202/index.php/fis/article/view/14 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841564257438662656 |
|---|---|
| author | Luca Andena Marta Rink Roberto Frassine |
| author_facet | Luca Andena Marta Rink Roberto Frassine |
| author_sort | Luca Andena |
| collection | DOAJ |
| description | Isotactic polybutene-1 (i-PB1) is a polymer used for the manufacturing of pressurized pipes.
In this work two grades of i-PB1 with a different degree of isotacticity have been investigated; they have
been supplied by Basell Polyolefins.
Fracture tests have been performed at various temperatures and testing speeds. Two configurations have
been used, single edge notch bending (SENB) and double cantilever beam (DCB), the latter only to study
crack propagation. Optical methods have been used to detect crack initiation and measure propagation
speed.
From the phenomenological point of view, the formation of highly stretched material regions has been observed
during crack propagation. A continuous tearing of these regions as the crack advances has often been
interrupted by their sudden rupture, with the load decreasing accordingly. This partial instability has been
observed on both material grades, with both testing configurations.
Results of the tests have been interpreted using the fracture mechanics framework; a time-temperature superposition
scheme has been adopted to represent viscoelastic behavior over several decades. An analytical
model has been applied to predict the lifetime of pressurized pipes. A good agreement has been reported between
model predictions and experimental data obtained from tests on polybutene pipes. |
| format | Article |
| id | doaj-art-8fb7e8f7dbc64f26b65a64f1bde5543e |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2013-04-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-8fb7e8f7dbc64f26b65a64f1bde5543e2025-01-02T23:01:23ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932013-04-0112Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibuteneLuca Andena0Marta Rink1Roberto Frassine2Politecnico di Milano, Dipartimento di ChimicaPolitecnico di Milano, Dipartimento di ChimicaPolitecnico di Milano, Dipartimento di ChimicaIsotactic polybutene-1 (i-PB1) is a polymer used for the manufacturing of pressurized pipes. In this work two grades of i-PB1 with a different degree of isotacticity have been investigated; they have been supplied by Basell Polyolefins. Fracture tests have been performed at various temperatures and testing speeds. Two configurations have been used, single edge notch bending (SENB) and double cantilever beam (DCB), the latter only to study crack propagation. Optical methods have been used to detect crack initiation and measure propagation speed. From the phenomenological point of view, the formation of highly stretched material regions has been observed during crack propagation. A continuous tearing of these regions as the crack advances has often been interrupted by their sudden rupture, with the load decreasing accordingly. This partial instability has been observed on both material grades, with both testing configurations. Results of the tests have been interpreted using the fracture mechanics framework; a time-temperature superposition scheme has been adopted to represent viscoelastic behavior over several decades. An analytical model has been applied to predict the lifetime of pressurized pipes. A good agreement has been reported between model predictions and experimental data obtained from tests on polybutene pipes.https://212.237.37.202/index.php/fis/article/view/14 |
| spellingShingle | Luca Andena Marta Rink Roberto Frassine Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene Fracture and Structural Integrity |
| title | Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene |
| title_full | Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene |
| title_fullStr | Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene |
| title_full_unstemmed | Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene |
| title_short | Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene |
| title_sort | applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene |
| url | https://212.237.37.202/index.php/fis/article/view/14 |
| work_keys_str_mv | AT lucaandena applicazionedellameccanicadellafratturaviscoelasticaallaprevisionedellavitaditubiinpolibutene AT martarink applicazionedellameccanicadellafratturaviscoelasticaallaprevisionedellavitaditubiinpolibutene AT robertofrassine applicazionedellameccanicadellafratturaviscoelasticaallaprevisionedellavitaditubiinpolibutene |