Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states
The deformation behaviour and fracture mechanisms of highdensity polyethylene (HDPE), polypropylene (PP) and polyamide 6 (PA 6) are investigated experimentally under different stress states and at different crosshead speeds of 1, 20 and 200 mm/min. Fracture surface morphologies were investigated in...
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Gruppo Italiano Frattura
2019-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero47/numero_47_art_8.pdf |
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| _version_ | 1841562302471471104 |
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| author | Jo�o P. Manaia Francisco A. Pires Ab�lio M. P. de Jesus |
| author_facet | Jo�o P. Manaia Francisco A. Pires Ab�lio M. P. de Jesus |
| author_sort | Jo�o P. Manaia |
| collection | DOAJ |
| description | The deformation behaviour and fracture mechanisms of highdensity polyethylene (HDPE), polypropylene (PP) and polyamide 6 (PA 6) are investigated experimentally under different stress states and at different crosshead speeds of 1, 20 and 200 mm/min. Fracture surface morphologies were investigated in a series of specimens tested at 200 mm/min under combined tension/shear loading at three different loading angles ( ? = 0, 30deg and 90deg) at room temperature (RT) and 50 �C. In addition, the effects of notch profile radii (stress triaxiality) on HDPE, PP and PA 6 fracture behaviour have been studied at RT, using flat and cylindrical notched specimens. Specimens� geometries were carefully designed to achieve various loading conditions and allowing to explore initial stress triaxialities ranged from 0 in pure shear loading ( ? = 0�) to a maximum of 0.84 for flat notched specimens with radius of 5 mm. The yield load shows an explicit dependency on temperature and crosshead speed. The fracture surfaces analysed reveals damage mechanisms such as crazing, void and cavitation formation. Two or more mechanisms are predominant, which means that the stresses along fracture process are not uniform. |
| format | Article |
| id | doaj-art-38fa054630a444c8b35a65efe3a38834 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-38fa054630a444c8b35a65efe3a388342025-01-03T01:02:44ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-01-0113478210310.3221/IGF-ESIS.47.0810.3221/IGF-ESIS.47.08Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress statesJo�o P. ManaiaFrancisco A. PiresAb�lio M. P. de JesusThe deformation behaviour and fracture mechanisms of highdensity polyethylene (HDPE), polypropylene (PP) and polyamide 6 (PA 6) are investigated experimentally under different stress states and at different crosshead speeds of 1, 20 and 200 mm/min. Fracture surface morphologies were investigated in a series of specimens tested at 200 mm/min under combined tension/shear loading at three different loading angles ( ? = 0, 30deg and 90deg) at room temperature (RT) and 50 �C. In addition, the effects of notch profile radii (stress triaxiality) on HDPE, PP and PA 6 fracture behaviour have been studied at RT, using flat and cylindrical notched specimens. Specimens� geometries were carefully designed to achieve various loading conditions and allowing to explore initial stress triaxialities ranged from 0 in pure shear loading ( ? = 0�) to a maximum of 0.84 for flat notched specimens with radius of 5 mm. The yield load shows an explicit dependency on temperature and crosshead speed. The fracture surfaces analysed reveals damage mechanisms such as crazing, void and cavitation formation. Two or more mechanisms are predominant, which means that the stresses along fracture process are not uniform.http://www.gruppofrattura.it/pdf/rivista/numero47/numero_47_art_8.pdfSemi-crystalline polymers Fracture SEM Stress triaxiality Multiaxial loading Butterfly specimen |
| spellingShingle | Jo�o P. Manaia Francisco A. Pires Ab�lio M. P. de Jesus Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states Fracture and Structural Integrity Semi-crystalline polymers Fracture SEM Stress triaxiality Multiaxial loading Butterfly specimen |
| title | Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states |
| title_full | Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states |
| title_fullStr | Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states |
| title_full_unstemmed | Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states |
| title_short | Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states |
| title_sort | elastoplastic and fracture behaviour of semi crystalline polymers under multiaxial stress states |
| topic | Semi-crystalline polymers Fracture SEM Stress triaxiality Multiaxial loading Butterfly specimen |
| url | http://www.gruppofrattura.it/pdf/rivista/numero47/numero_47_art_8.pdf |
| work_keys_str_mv | AT joopmanaia elastoplasticandfracturebehaviourofsemicrystallinepolymersundermultiaxialstressstates AT franciscoapires elastoplasticandfracturebehaviourofsemicrystallinepolymersundermultiaxialstressstates AT abliompdejesus elastoplasticandfracturebehaviourofsemicrystallinepolymersundermultiaxialstressstates |