Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates
Polyetheretherketone (PEEK) is used in several engineering applications where it has to bear impact loads. Nevertheless, the tensile behavior has only been studied in the quasi-static range of loading rates. To address the lack of data in the impact strain rate range, the tensile mechanical behavior...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2015/275937 |
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| author | Zakaria El-Qoubaa Ramzi Othman |
| author_facet | Zakaria El-Qoubaa Ramzi Othman |
| author_sort | Zakaria El-Qoubaa |
| collection | DOAJ |
| description | Polyetheretherketone (PEEK) is used in several engineering applications where it has to bear impact loads. Nevertheless, the tensile behavior has only been studied in the quasi-static range of loading rates. To address the lack of data in the impact strain rate range, the tensile mechanical behavior of PEEK is investigated at room temperature over a large range of strain rates (from 0.001 to 1000/s). The macroscopic volume change is studied under uniaxial tension using digital image correlation (DIC) method, showing a significant dilatation that reaches 16% at a logarithmic axial strain of 40%. The true stress-strain behavior is therefore established based on the measured volume change. Elsewhere, the yield stress shows a significant sensitivity to strain rate. Besides, a new constitutive equation is proposed to take into account the increase in strain rate sensitivity at high strain rates. It assumes an apparent activation volume which decreases as the strain rate increases. The new constitutive equation gives similar results when compared to the Ree-Eyring equation. However, only three material constants are to be identified and are physically interpreted. |
| format | Article |
| id | doaj-art-aec4d147e50e4ace9f8cfc49c093a5c4 |
| institution | Kabale University |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-aec4d147e50e4ace9f8cfc49c093a5c42025-02-03T05:57:45ZengWileyInternational Journal of Polymer Science1687-94221687-94302015-01-01201510.1155/2015/275937275937Tensile Behavior of Polyetheretherketone over a Wide Range of Strain RatesZakaria El-Qoubaa0Ramzi Othman1Institut de Recherche en Génie Civil et Mécanique, UMR CNRS 6183, École Centrale de Nantes, L’UNAM, 1 rue de la Noe, BP 92101, 44321 Nantes Cedex 3, FranceMechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, P.O. Box 80248, Jeddah 21589, Saudi ArabiaPolyetheretherketone (PEEK) is used in several engineering applications where it has to bear impact loads. Nevertheless, the tensile behavior has only been studied in the quasi-static range of loading rates. To address the lack of data in the impact strain rate range, the tensile mechanical behavior of PEEK is investigated at room temperature over a large range of strain rates (from 0.001 to 1000/s). The macroscopic volume change is studied under uniaxial tension using digital image correlation (DIC) method, showing a significant dilatation that reaches 16% at a logarithmic axial strain of 40%. The true stress-strain behavior is therefore established based on the measured volume change. Elsewhere, the yield stress shows a significant sensitivity to strain rate. Besides, a new constitutive equation is proposed to take into account the increase in strain rate sensitivity at high strain rates. It assumes an apparent activation volume which decreases as the strain rate increases. The new constitutive equation gives similar results when compared to the Ree-Eyring equation. However, only three material constants are to be identified and are physically interpreted.http://dx.doi.org/10.1155/2015/275937 |
| spellingShingle | Zakaria El-Qoubaa Ramzi Othman Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates International Journal of Polymer Science |
| title | Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates |
| title_full | Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates |
| title_fullStr | Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates |
| title_full_unstemmed | Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates |
| title_short | Tensile Behavior of Polyetheretherketone over a Wide Range of Strain Rates |
| title_sort | tensile behavior of polyetheretherketone over a wide range of strain rates |
| url | http://dx.doi.org/10.1155/2015/275937 |
| work_keys_str_mv | AT zakariaelqoubaa tensilebehaviorofpolyetheretherketoneoverawiderangeofstrainrates AT ramziothman tensilebehaviorofpolyetheretherketoneoverawiderangeofstrainrates |