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Quasi-static combined compression-shear crushing of honeycombs: An experimental study

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posted on 2024-07-11, 12:26 authored by Dahai Zhang, Guoxing Lu, Dong RuanDong Ruan, Qingguo Fei, Wenhui Duan
The mechanical behavior of aluminum honeycombs subjected to quasi-static combined compression-shear loading was experimentally investigated. Two different deformation patterns were observed, deforming cell walls non-inclined (Mode I) and inclined (Mode II) respectively. For the first time, normal and shear forces of honeycombs deforming in Mode II were measured directly using a tri-axial load cell. It was found that the shear force behavior was very different for Modes I and II, with a negative shear force being observed for Mode II, which was not previously reported. Three aluminum hexagonal honeycombs with different cell configurations (cell size and wall thickness) were tested at two loading velocities of 5 × 10−4 and 5 × 10−3 m/s, three loading angles of 15° 30° and 45° in the two plane orientations, respectively. The effects of loading velocity, loading angle and loading plane were discussed in detail. An empirical model specifically revealing the effect of loading angle on normal plateau stress was proposed. Initial yield surface was estimated and was found to take the form of an ellipse envelop in the stress space.

Funding

ARC | DP160102612

ARC | DP180102661

Study on dynamic performance of metal-folded sandwich panel structure under impact and blast loading : National Natural Science Foundation of China | 51578361

Origami Structures and Materials: Energy Absorption and Impact Mechanics : Australian Research Council (ARC) | DP180102661

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ISSN

1873-4197

Journal title

Materials and Design

Volume

167

Article number

article no. 107632

Pagination

107632-

Publisher

Elsevier BV

Copyright statement

Copyright © 2019 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Language

eng

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