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Tensile Properties and Fatigue Behavior of Geopolymer Matrix Composites with Carbon Fiber Reinforcement at Elevated Temperature.
| 题名： | Tensile Properties and Fatigue Behavior of Geopolymer Matrix Composites with Carbon Fiber Reinforcement at Elevated Temperature. |
| 作者： | Wilcox, S. M. |
| 关键词： | Stress strain relations, Tensile stress, Carbon fibers, Polymer matrix composites, Tensile strength, Mechanical properties, Carbon nanotubes, Material degradation processes, Fatigue (mechanics), Geopolymer, 300c, Geopolymer matrix composite, Inorganic matrix composite |
| 摘要： | The tensile stress-strain and tension-tension fatigue behavior of geopolymer matrix composites reinforced with 0/90 carbon fibers was investigated at 23 and 300C in laboratory air. The relative ease of synthesis and low processing temperatures, along with fire resistance make geopolymers an attractive choice as a matrix material for composite materials for use at elevated temperature. Currently, geopolymer matrix composites are being considered as possible replacements for ceramic matrix composites and high-temperature polymer matrix composites. In this work composites with two different types of geopolymer matrix were evaluated: (1) composite with a sodium-based geopolymer matrix (NaGP) and (2) composite with a potassium-based geopolymer matrix (KGP). Experimental results revealed a degrading effect of elevated temperature on tensile stress-strain behavior and tensile properties. Fatigue run-out was set to 2x105 cycles., with fatigue run-out only achieved at a low maximum stress of 30 UTS. Test specimens were examined before and after testing using an optical microscope, revealing profuse cracking of the geopolymer matrix occurred early in all tests. As a result further mechanical response of the composite was governed by the carbon fibers. The best mechanical performance was obtained from a panel of the KGP-matrix composite. |
| 报告类型： | 科技报告 |
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