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| Experimental Study on Strength of Bolted Joint of Composites at Elevated Temperature |
| Received:April 22, 2017 Revised:September 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.09.010 |
| KeyWord:resin matrix composites bolted joint damage mode load-displacement curve |
| Author | Institution |
| XU Lu-bing |
China Aviation Powerplant Research Institute CAPI, Zhuzhou , China |
| ZHANG Hong-jian |
College of Energy & Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| LYU Wen-li |
College of Energy & Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| WEN Wei-dong |
College of Energy & Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China |
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| Abstract: |
| Objective To study effects rules of high temperature on strength and damage modes in bolted joints made of composites. Methods Various tensile tests for bolted joints of T300/BMP316 composites with different W/D were conducted at indoor temperature-310 ℃. Results Change rules on strength and failure mode of bolted joints made of resin matrix composites with different W/D and temperature were obtained. Conclusion There are common features and apparent differences in load-displacement curves of bolted joints with different W/D which has apparent influences on the tensile strength and damage mode of bolted joints made of composites. At the same temperature, the tensile strength decreases with the increase of W/D. The damage mode changes from tensile-crushing failure mode to shear-crushing failure mode. When W/D increases, the domination mode changes from tensile failure to shear failure. The damage modes of joints are insensitive to the temperature, but the strength of joints decreases greatly when the temperature increases, which is because it is easy to cause the tensile failure and crushing failure in joints due to the mechanical properties degradation of resin at elevated temperature. |
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