Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
818352 | Composites Part B: Engineering | 2013 | 10 Pages |
Abstract
In the present work, the time-dependent mechanical behavior of three materials from the fluorocarbon family, including PTFE without filler, 15Â vol.% regenerated graphite particles-filled PTFE, and 32Â vol.% carbon and 3Â vol.% graphite particles-filled PTFE, was investigated using cylindrical macroindentation. Indentation relaxation experiments with a cylindrical flat-tip indenter having a diameter of 1Â mm were performed at three different strain levels. The generalized Maxwell model in terms of the Prony series and a time-dependent solution based on the power-law creep equation were used to model the viscoelastic response and to extract the time-dependent properties. The stress relaxation properties were found to improve with the addition of fillers. The unfilled PTFE exhibited the lowest stress-relaxation properties, whereas the 32Â vol.% carbon and 3Â vol.% graphite particles-filled PTFE composite showed the highest stress-relaxation properties.
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Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Felicia Stan, Catalin Fetecau,