Effect of strain rate, thickness, welding on the J–R curve for polyethylene pipe materials
| Autor: | Hossam El-Din M. Sallam, Tarek M. A. A. EL-Bagory, Maher Y. A. Younan |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Applied Mathematics Mechanical Engineering technology industry and agriculture Welding respiratory system Strain rate Condensed Matter Physics Crosshead law.invention Linear low-density polyethylene Fracture toughness law Ultimate tensile strength Fracture (geology) General Materials Science High-density polyethylene Composite material |
| Zdroj: | Theoretical and Applied Fracture Mechanics. 74:164-180 |
| ISSN: | 0167-8442 |
| DOI: | 10.1016/j.tafmec.2014.09.008 |
| Popis: | The main purpose of the present paper is to investigate the effect of strain rate, specimen thickness and welding on the fracture toughness for the specimens made from high-density polyethylene (HDPE). The welds at the pipe junction are produced by butt-fusion (BF) welding. Tensile tests specimens are cut longitudinally from the pipe with thickness, T = 30 mm, and are tested at different crosshead speeds (10–500 mm/min), and gauge lengths, G = 20 mm, to determine the mechanical properties of welded and unwelded specimens. Curved three-point bend (CTPB) fracture specimens are used. The effect of specimen thickness variation for welded and unwelded specimens is studied at room temperature, ( T a = 23 °C), and at different crosshead speeds, V C . H , (10–500 mm/min). The study reveals that the crosshead speed has a significant effect on the fracture toughness of both welded and unwelded specimens. The fracture toughness, J IC , is greater for unwelded than welded specimen. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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