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Bending behavior of sandwich beam with tailored hierarchical honeycomb cores
Abstract It is challenging to maintain the lightweight performance of sandwich structure while at the same time to obtain high bending stiffness and strength. In this study, sandwich beams with hierarchical honeycomb cores were proposed. Corresponding mechanical responses bsubjected to three-point bending load were explored and compared with that of the sandwich equipped with conventional honeycomb core by means of numerical simulation. Theoretical solutions of equivalent bending stiffness coincide well with numerical results. Scaling effect of vertex cell and cell size on the hierarchical honeycomb sandwich was investigated. Two tailored hierarchical patterns were proposed by replacing the hexagonal vertex cells with circular and square cells. Compared with the conventional counterpart, the hierarchical sandwich beams offer higher load-bearing capacity. Distinctions of bending strength of each configuration demonstrate different influences of tailored hierarchical cores on enhancing bending resistance ability. There are more local interactions of cells for hierarchical structures. The local improvement promotes more cells to withstand load and the whole sandwich beam can be globally strengthened.
Highlights Sandwich beams with tailored hierarchical honeycomb cores were proposed. Bending performance of tailored hierarchical sandwiches is superior to that of the conventional counterpart. Equivalent bending stiffness and bending strength were obtained and analyzed. Strengthening mechanism of each tailored hierarchical structure was revealed.
Bending behavior of sandwich beam with tailored hierarchical honeycomb cores
Abstract It is challenging to maintain the lightweight performance of sandwich structure while at the same time to obtain high bending stiffness and strength. In this study, sandwich beams with hierarchical honeycomb cores were proposed. Corresponding mechanical responses bsubjected to three-point bending load were explored and compared with that of the sandwich equipped with conventional honeycomb core by means of numerical simulation. Theoretical solutions of equivalent bending stiffness coincide well with numerical results. Scaling effect of vertex cell and cell size on the hierarchical honeycomb sandwich was investigated. Two tailored hierarchical patterns were proposed by replacing the hexagonal vertex cells with circular and square cells. Compared with the conventional counterpart, the hierarchical sandwich beams offer higher load-bearing capacity. Distinctions of bending strength of each configuration demonstrate different influences of tailored hierarchical cores on enhancing bending resistance ability. There are more local interactions of cells for hierarchical structures. The local improvement promotes more cells to withstand load and the whole sandwich beam can be globally strengthened.
Highlights Sandwich beams with tailored hierarchical honeycomb cores were proposed. Bending performance of tailored hierarchical sandwiches is superior to that of the conventional counterpart. Equivalent bending stiffness and bending strength were obtained and analyzed. Strengthening mechanism of each tailored hierarchical structure was revealed.
Bending behavior of sandwich beam with tailored hierarchical honeycomb cores
Li, Zhendong (author) / Wang, Zhonggang (author) / Wang, Xinxin (author) / Zhou, Wei (author)
Thin-Walled Structures ; 157
2020-07-26
Article (Journal)
Electronic Resource
English
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