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- W2000319400 abstract "In this study, fracture and failure behavior of multilayered polymer composite used as thermal insulator in subsea pipe line was investigated at various strain rates (e) with and without simulated cracks. For this study, polymer composites samples were obtained from field pipes used in the North Sea. The multilayered polypropylene composite materials were tested in four-point bending with and without notch at various displacement rates. Also the fracture behavior of the polymer composite materials was investigated in direct tension at various loading rates with and without pinholes. A three dimensional (3D) digital image correlation (DIC) system was used to monitor the deformation field near the crack tip, which provided the strain field distribution with the crack initiation and growth with time. The polymer composite material was viscoplastic and the tensile strength and failure strain increased and decreased respectively with the increasing strain rate. The tensile strain intensity factor γ (a new concept) was determined to govern the fracture behavior of the materials due to the strain concentration at the crack tip. In the range of strain rates (e) investigated in this study, the strain intensity factor γ was over 30 for the unfilled polypropylene (PP) and polypropylene composite with 65% glass filler." @default.
- W2000319400 created "2016-06-24" @default.
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- W2000319400 date "2014-07-30" @default.
- W2000319400 modified "2023-09-23" @default.
- W2000319400 title "Fracture Behavior and Digital Image Correlation (DIC) Characterization of Multilayered Polymer Insulation Composite Coating Used in Subsea Pipelines" @default.
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- W2000319400 doi "https://doi.org/10.1061/9780784413692.207" @default.
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