Micromechanical analysis of fatigue and crack growth in carbon-fiber epoxy composites based on mechanical testing
| Autor: | Milica Sekulić, Aleksandra Jelić, Marina Stamenović, Slaviša Putić, Vukašin Ugrinović |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Fiber orientation Carbon fibers 02 engineering and technology lcsh:Chemical technology Structural element static tests 0203 mechanical engineering Ultimate tensile strength sem lcsh:TP1-1185 Growth rate Composite material Dynamic strength dynamic tests General Chemistry Epoxy composite material 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports visual_art SEM visual_art.visual_art_medium crack growth 0210 nano-technology |
| Zdroj: | Hemijska Industrija, Vol 74, Iss 4, Pp 257-264 (2020) Hemijska industrija |
| ISSN: | 2217-7426 0367-598X |
| DOI: | 10.2298/hemind200615022j |
| Popis: | The paper presents static and dynamic tests of carbon/epoxy composite materials with fiber orientation at 0°/90° and ±45°. The main tensile properties were determined as a basis for subsequent dynamic tests, in which permanent dynamic strength, crack growth, and crack growth rate in the material due to the action of fatigue load were assessed. Comparisons were made regarding the structure of the tested specimens. Samples were obtained from prepregs with a specific density of 1600 kg/m3. The tests were performed at room temperature. Scanning electron microscopy (SEM) was used to analyze the damage in the material during these tests, the mechanisms of their further damage progression and, the impact on the growth and growth rate of the initial crack in the material. The analysis of numerical results and micromechanical analysis confirmed the dominant role of the reinforcing structural element in the material in all performed tests. The obtained results are of great importance in the application of composite materials of such structures under different operating conditions and load regimes. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 451-03-68/2020-14/200135] |
| Databáze: | OpenAIRE |
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