| Autor: |
Maximilian Jux, Thorsten Mahrholz, Wibke Exner, Till Julian Adam, Peter Wierach |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Acting Principles of Nano-Scaled Matrix Additives for Composite Structures ISBN: 9783030685225 |
| DOI: |
10.1007/978-3-030-68523-2_20 |
| Popis: |
Nanoparticles are proven to enhance the material characteristics of carbon fiber reinforced composites. But these scientific findings are only verified at a lab-scale level. This chapter investigates the extent to which the material performance of nanoparticle-modified resins can be transferred from the coupon level to a larger-scale component. To this end, L-brackets and C-frames are manufactured and the corresponding mechanical performance and matrix-induced distortions are compared. The results for the L-brackets reveal a reduction of the spring-in by 17 wt.% by adding boehmite nanoparticles. This results mostly from the decrease of the matrix’s chemical shrinkage. The effect can also be found for the C-frame, but here standard deviations are high and negate the positive effect of the particles. Even though clear evidence is missing, for larger components it seems likely that deviations in fiber volume content and defects in the fiber orientation are more relevant than the impact of the particles. The analysis of the mechanical performance involved 4-point bending tests of impacted C-frames. This was carried out to investigate the upscaling effects of compression after impact tests. Interestingly, the C-frames with nanoparticles show significant decrease in damage areas after impact in comparison to the unmodified specimen. However, this difference does not result in increased mechanical performance in the bending test. The most likely explanation is that the known enhancements of the matrix material only play a subordinate role in case of abrupt structural stability failure without a preceding period of rising damage. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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