期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 103, 期 -, 页码 219-229出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2017.09.019
关键词
Cure behavior; Residual/internal stress; Analytical modeling; Process monitoring
资金
- JSPS [26-5837, 26220912]
- SIP (Cross-ministerial Strategic Innovation Promotion Program) - SM4I (Structural Materials for Innovation) by Council for Science, Technology and Innovation (CSTI), Japan
- Grants-in-Aid for Scientific Research [26220912] Funding Source: KAKEN
Process-induced shape distortion is generated in curved composite parts. In the accompanying paper, the authors developed a fiber-optic monitoring method and confirmed that chemical cure shrinkage induces through-thickness shear deformation, which is the key deformation affecting final shape. The present paper first investigated the effects of thickness, flange length, and shape on internal states and process-induced deformation. Shear deformation was suppressed as the part thickness decreased and the flange length increased, resulting in larger spring-in. The shape effect was evaluated by comparing L- and U-shaped components. Larger warpage and spring-in were generated in the U-shaped part, indiacting that deformation in a U-shaped part is not a simple superposition of two L-shaped parts. Finally, a curved ply drop-off structure was investigated as a practical example. Internal strain was uniform in parts of different thickness, whereas residual deformation was non-uniform in the longitudinal direction due to mechanical coupling between the two parts. (C) 2017 Elsevier Ltd. All rights reserved.
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