Vol. 16, No. 5, 2021

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Equivalent mechanical properties of additively manufactured octagonal honeycombs: theoretical and experimental analysis

Sen Zhang, Shuheng Wang, Jiaxin Cai, Yongbin Ma and Zichen Deng

Vol. 16 (2021), No. 5, 655–675
DOI: 10.2140/jomms.2021.16.655
Abstract

Equivalent mechanical properties are presented for additively manufactured octagonal honeycomb structures in this paper. Based on classical beam theory, the stiffness matrix of octagonal honeycomb structure is obtained analytically. Based on this, the analytical expressions of elastic modulus, Poisson’s ratio and yield strength of octagonal honeycomb structures are derived. The octagonal honeycomb structures are printed by fused deposition modeling (FDM) technology, and the mechanical properties are obtained by uniaxial quasistatic compression test. In addition, the quasistatic compression finite element model of octagonal honeycomb structure is established. Finally, the comparisons of the theoretical results with the numerical results, the experimental results and the literature results verify the accuracy and effectiveness of the analytical expressions derived in this paper for the mechanical properties of octagonal honeycomb structures.

Keywords
octagonal honeycomb, equivalent mechanical properties, additive manufacturing, stiffness matrix
Milestones
Received: 28 February 2021
Revised: 25 August 2021
Accepted: 31 August 2021
Published: 31 August 2022
Authors
Sen Zhang
School of Mechanics, Civil Engineering and Architecture and MIIT Key Laboratory of Dynamics and Control of Complex Systems
Northwestern Polytechnical University
127 West Youyi Road, Xi’an
Xi’an, 710072
China
Shuheng Wang
School of Mechanics, Civil Engineering and Architecture and MIIT Key Laboratory of Dynamics and Control of Complex Systems
Northwestern Polytechnical University
127 West Youyi Road, Xi’an
Xi’an, 710072
China
Jiaxin Cai
School of Mechanics, Civil Engineering and Architecture and MIIT Key Laboratory of Dynamics and Control of Complex Systems
Northwestern Polytechnical University
127 West Youyi Road, Xi’an
Xi’an, 710072
China
Yongbin Ma
School of Mechanics, Civil Engineering and Architecture and MIIT Key Laboratory of Dynamics and Control of Complex Systems
Northwestern Polytechnical University
127 West Youyi Road, Xi’an
Xi’an, 710072
China
Zichen Deng
School of Mechanics, Civil Engineering and Architecture and MIIT Key Laboratory of Dynamics and Control of Complex Systems
Northwestern Polytechnical University
127 West Youyi Road, Xi’an
Xi’an, 710072
China