Plastic flow and failure in single point incremental forming of PVC sheets
This paper presents an innovative and effective methodology to characterize plastic flow and failure in single point incremental forming (SPIF) of polymers that allows determining the stresses and the accumulated values of ductile damage directly from the experimental values of strain at various pos...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2014-05-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0004976&mi=cd |
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| author | P. A. F. Martins S. Alkas Yonan M. B. Silva A. E. Tekkaya |
| author_facet | P. A. F. Martins S. Alkas Yonan M. B. Silva A. E. Tekkaya |
| author_sort | P. A. F. Martins |
| collection | DOAJ |
| description | This paper presents an innovative and effective methodology to characterize plastic flow and failure in single point incremental forming (SPIF) of polymers that allows determining the stresses and the accumulated values of ductile damage directly from the experimental values of strain at various positions over the deformed polymer sheets. The approach traces the deformation path of material elements in conical and pyramidal SPIF parts, undergoing linear strain loading paths from beginning until failure, and is built upon the generalization of the analytical framework conditions assumed by Glover et al. [1] to the pressure-sensitive yield surfaces of polymers under incompressible, non-associated, plastic flow. Experimentation in conventional and multi-stage SPIF of Polyvinylchloride (PVC) sheets confirms the effectiveness of the proposed methodology and demonstrates that standard non-coupled damage models currently utilized in sheet metal forming are inapplicable to describe failure in polymers. Instead fracture forming limit lines (FFL’s) should be employed. |
| format | Article |
| id | doaj-art-3f03cd2687e542a78f6f38fff8f3e93e |
| institution | DOAJ |
| issn | 1788-618X |
| language | English |
| publishDate | 2014-05-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-3f03cd2687e542a78f6f38fff8f3e93e2025-08-20T02:52:37ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2014-05-018530131110.3144/expresspolymlett.2014.34Plastic flow and failure in single point incremental forming of PVC sheetsP. A. F. MartinsS. Alkas YonanM. B. SilvaA. E. TekkayaThis paper presents an innovative and effective methodology to characterize plastic flow and failure in single point incremental forming (SPIF) of polymers that allows determining the stresses and the accumulated values of ductile damage directly from the experimental values of strain at various positions over the deformed polymer sheets. The approach traces the deformation path of material elements in conical and pyramidal SPIF parts, undergoing linear strain loading paths from beginning until failure, and is built upon the generalization of the analytical framework conditions assumed by Glover et al. [1] to the pressure-sensitive yield surfaces of polymers under incompressible, non-associated, plastic flow. Experimentation in conventional and multi-stage SPIF of Polyvinylchloride (PVC) sheets confirms the effectiveness of the proposed methodology and demonstrates that standard non-coupled damage models currently utilized in sheet metal forming are inapplicable to describe failure in polymers. Instead fracture forming limit lines (FFL’s) should be employed.http://www.expresspolymlett.com/letolt.php?file=EPL-0004976&mi=cdProcessing technologiesIncremental sheet formingPolyvinylchloride (PVC)DamageFracture |
| spellingShingle | P. A. F. Martins S. Alkas Yonan M. B. Silva A. E. Tekkaya Plastic flow and failure in single point incremental forming of PVC sheets eXPRESS Polymer Letters Processing technologies Incremental sheet forming Polyvinylchloride (PVC) Damage Fracture |
| title | Plastic flow and failure in single point incremental forming of PVC sheets |
| title_full | Plastic flow and failure in single point incremental forming of PVC sheets |
| title_fullStr | Plastic flow and failure in single point incremental forming of PVC sheets |
| title_full_unstemmed | Plastic flow and failure in single point incremental forming of PVC sheets |
| title_short | Plastic flow and failure in single point incremental forming of PVC sheets |
| title_sort | plastic flow and failure in single point incremental forming of pvc sheets |
| topic | Processing technologies Incremental sheet forming Polyvinylchloride (PVC) Damage Fracture |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0004976&mi=cd |
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