Hydroforming of Sandwich Panels

研究的目的是为了提高对液压成形夹层材料力学的理解。由两个面板和一个多孔芯构成的夹层材料已被用于减轻重量、改善隔热、减少噪音和振动以及增加能量吸收。传统的成型夹芯板的制造方法成本高、耗时长。该项目将研究一种新的方法来制造成型夹层板的基础上使用片材液压成形技术。该项目将解决具有挑战性的问题，包括：夹层板的成分的有效表征和建模;了解面板褶皱/断裂，芯剪切/断裂以及面板和芯之间的分层之间的竞争失效模式;确定夹层材料的成形极限;并进行实验以验证模型预测。如果成功，这项研究将有助于人们对夹层板的变形机理有一个基本的了解，并将拓宽夹层材料的应用范围用于各种行业的减重应用。研究成果对提高汽车燃油效率、减少有害排放等具有重要意义。该项目还将为学生提供良好的机会，积极参与具有实际应用的研究项目。

The objective of the research is to advance the understanding of the mechanics of hydroforming sandwich materials. Sandwich materials, constructed from two face sheets and a porous core, have been used to reduce weight, improve thermal insulation, reduce noise and vibration, and increase energy absorption. The traditional method of constructing shaped sandwich panels is costly and time consuming. The proposed project will investigate a new approach to manufacture shaped sandwich panels based using sheet hydroforming techniques. The project will address challenging issues including: effective characterization and modeling of the constituents of the sandwich panel; understanding the competing failure modes among face sheet wrinkle/fracture, core shear/fracture, and de-lamination between the face sheet and the core; determining the forming limit of the sandwich materials; and conducting experiments to validate model predictions.If successful, this research will lead to a fundamental understanding of the deformation mechanics of sandwich panels and will broaden the use of sandwich materials for weight reduction applications in various industries. The research results can generate significant impact such as improving vehicle fuel efficiency and decreasing harmful emissions. The project will also provide excellent opportunities for students to actively participate in a research project that has practical applications.