Transactions of Materials and Heat Treatment

Title：Springback prediction on vacuum negative pressure forming for high precision panel of double-curvature sandwich structure with honeycomb core

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ClassificationCode：TG306

year,vol(issue):pagenumber：2020,45(7):41-45

Abstract：

For the precision control problem of vacuum negative pressure forming for double-curvature sandwich structure panel with honeycomb core, a method of springback prediction was established based on semi-analytical and semi-numeric simulation. Firstly, the finite element model of compression analysis for single-layer aluminum plate was established by the finite element method, and the membrane stress of large deflection bending for aluminum plate was obtained. Then, the critical membrane pressure of single-layer aluminum plate was solved by the large deflection bending equilibrium equation of thin plate, and the finite element model of springback prediction for vacuum negative pressure forming of sandwich structure panel was established by the critical membrane pressure, and the springback prediction of double-curvature sandwich structure panel with honeycomb core was accomplished. Finally, the vacuum negative pressure forming experiment of sandwich structure panel was carried out, and the deviation of surface accuracy for panel obtained by finite element simulation and forming experiment was 9.3%, which indicated that the established springback prediction model had higher prediction accuracy.

Funds：

国家自然科学基金资助项目(51575028)

王明明(1989-)，男，博士研究生 E-mail：bzwangmm@126.com 通讯作者：李东升(1965-)，男，工学博士，教授 E-mail：lidongss@buaa.edu.cn

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