An investigation of the influence of moisture on fatigue damage mechanisms in a woven glass-fibre-reinforced PA66 composite using acoustic emission and infrared thermography
| Autor: | Amélie Malpot, Fabienne Touchard, Sébastien Bergamo |
|---|---|
| Přispěvatelé: | ENDOmmagement et durabilité ENDO (ENDO), Département Physique et Mécanique des Matériaux (Département Physique et Mécanique des Matériaux), Institut Pprime (PPRIME), ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut Pprime (PPRIME), ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers, Technocentre Renault [Guyancourt], RENAULT |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Moisture Infrared Mechanical Engineering Composite number Glass fiber Fatigue damage 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Woven composite Industrial and Manufacturing Engineering 0104 chemical sciences Acoustic emission Influence of moisture Breakage Mechanics of Materials [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] Thermography Infrared thermography Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Composites Part B: Engineering Composites Part B: Engineering, Elsevier, 2017, 130, pp.11-20. ⟨10.1016/j.compositesb.2017.07.017⟩ |
| ISSN: | 1359-8368 1879-1069 |
| DOI: | 10.1016/j.compositesb.2017.07.017 |
| Popis: | International audience; A woven glass-fibre-reinforced composite with a polyamide 6,6 matrix is considered for the purpose of being integrated into an automotive part. Fatigue tests were conducted on both [(0/90)3] and [(±45)3] stacking sequences. In order to analyze the influence of moisture content on the fatigue behaviour, samples were conditioned at RH0, RH50 and RH100. Although moisture content affects the fatigue life for high stress levels, this effect tends to disappear for low stress levels. This phenomenon was confirmed by additional fatigue tests in a climatic chamber. This paper aims to investigate damage mechanisms developing within the material during fatigue test in order to understand the origin of this phenomenon. Two in-situ non-destructive techniques were used in order to detail the fatigue damage scenario: namely, acoustic emission and infrared thermography. These techniques allow locating and differentiating the main damage mechanisms: matrix cracking, fibre/matrix debonding and fibre breakages. In addition, microscopic observations and synchrotron X-ray microtomography were realized on fatigue coupons to visualize fibre breakages. Results have highlighted an increase in the amount of fibre breakage when the applied fatigue stress decreases, which explains the observed phenomenon. |
| Databáze: | OpenAIRE |
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