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| Natural Aging and Life Prediction of Glass Fiber Reinforced Composite Material in Xiamen |
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| DOI：10.7643/issn.1672-9242.2023.03.018 |
| KeyWord:glass fiber reinforced unsaturated polyester resin natural aging aging mechanism bending strength life prediction |
| Author | Institution |
| AN Qi |
Norinco Group 53rd Institute, Jinan , China |
| WANG Deng-xia |
Norinco Group 53rd Institute, Jinan , China |
| SUN Yan |
Norinco Group 53rd Institute, Jinan , China |
| XIE Ke-yong |
Norinco Group 53rd Institute, Jinan , China |
| LI Hui |
Norinco Group 53rd Institute, Jinan , China |
| WANG Xin-bo |
Norinco Group 53rd Institute, Jinan , China |
| DUAN Jian |
Norinco Group 53rd Institute, Jinan , China |
| LIU Guo-dong |
The First Company of China Construction Eighth Engineering Division Corp.Ltd., Jinan , China |
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| Abstract: |
| The work aims to study the natural aging mechanism of the glass fiber reinforced unsaturated polyester resin, and predict the service life of the composite in Xiamen. The change rules of surface and mechanical properties of the glass fiber reinforced unsaturated polyester resin after natural aging for 3 years under 3 modes of atmospheric corrosion, seawater splashing and seawater immersion in Xiamen coastal area were studied. The microstructures of the samples under different aging modes were observed by scanning microscope and infrared spectrometer to explain the aging mechanism of composite material. The service life of the composite material was predicted by the liner regression equation method. The change rules of tensile strength and bending strength of the composite material during aging were obtained. The liner regression equation of samples under atmospheric corrosion was determined and the service life when the bending strength dropped to the failure index of 75% was calculated.The natural aging degree of the composite material is the greatest under atmospheric corrosion, while the degree is minimal under seawater immersion. During the aging process, the unsaturated polyester resin of the surface is aged and separated. The life of the composite material when the bending strength drops to the failure index of 75% is 93.3 months. |
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