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| Weighting Analysis of Factors of Spring-Back for C-Shaped Composite Spars |
| YANG Qing1,2, LIU Weiping1,2, YU Muhuo2, YAN Dongxiu1, CHEN Ping1, JIA Lijie1,XU Peng1，WEI Ran1 |
( 1. COMAC Shanghai Aircraft Manufacturing Co., Ltd , Shanghai 200436, China;
2. Collaborative Innovation Center of Civil Aviation Composite Materials, Donghua University, Shanghai 201620, China ) |
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Abstract Affect factors of spring-back for C-shaped composite spars generally include geometry, shear effect between
plies, and mold, et al. The factors often bring to process-induced distortion in composite structures which would lead
to bad geometric accuracy. Through analyzing the factors by theory approach, the FE calculation and experiment method,
the spring-back values of C-shaped spars in structures of aircraft are calculated and the weight values of the factors are also
estimated, which could be used to provide some bases for distortion prediction and control for C-shaped composite spars.
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2017, 
