期刊
THIN-WALLED STRUCTURES
卷 169, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2021.108425
关键词
Process induced distortions (PIDs); Cure behaviour; Analytical modelling; U-shaped composite parts
资金
- National Natural Science Foundation of China [11902231]
- Fundamental Research Funds for the Central Universities [WUT:203101002, WUT:203201006]
This study proposes analytical solutions for predicting spring-in angles of U-shaped composite parts, which can quantitatively analyze the correlation between spring-in angles of different parts of the parts and material properties and geometric parameters, and its reliability is verified by comparing theoretical calculations and experimental measurements.
Analytical solutions for predicting spring-in angles of U-shaped composite parts generating in rubbery and glassy states are proposed. In the newly developed analytical solutions, the process-induced distortions of web and flange are mathematically converted to spring-in angles within the scope of small deformation theory, and then corresponding analytical expressions of web, corner, flange and total spring-in are separately derived. These new solutions can quantitatively give the correlation of web, corner, flange and total spring-in with material properties-related and geometrical configuration-dependent parameters, and evaluate the spring-in angles of multi-angle ply composite parts just using lamina properties. The reliability of newly proposed analytical solutions is checked by the comparison between the analytically calculated and experimentally measured spring-in angles for unidirectional and quasi-isotropic U-shaped composite parts. Meanwhile, numerical simulations on the U-shaped composite parts with various geometries and layups also provide a favourable agreement with analytical results.
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