Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 106, Issue -, Pages 15-19Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2014.10.008
Keywords
Residual stress; Microwave processing; Polymer-matrix composites (PMCs)
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Funding
- National Natural Science Foundation of China [51305195]
- Outstanding Talents Cultivation Fund [NE2012003]
- Major Breeding Project [NP2014201]
- Fundamental Research Funds for the Central Universities of Nanjing University of Aeronautics and Astronautics [NZ2014201]
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Carbon fiber reinforced bismaleimide composites provide many outstanding properties and are widely used in aerospace applications. However, cure-induced strains are present in virtually all composites that severely impact on the whole service lifecycle of composite components. This paper will demonstrate that the cure-induced strains can be drastically reduced in fiber/bismaleimide composites using the microwave curing process. Nearly 95% reduction of cure-induced strains has been achieved compared with the conventional thermal heating process. The microwave manufacturing cycle for composites was only 36% of the thermal processing cycle. When using the microwave process, the spring-in angle of an L-shaped part was reduced by about 1.2 degrees compared by using thermal heating. (C) 2014 Elsevier Ltd. All rights reserved.
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