Deformation and Failure Behavior of Wooden Sandwich Composites with Taiji Honeycomb Core under a Three-Point Bending Test

Authors

Jingxin Hao, Central South University of Forestry and Technology
Xinfeng Wu, West Virginia University
Gloria Oporto, West Virginia UniversityFollow
JIngxin Wang, West Virginia UniversityFollow
Gregory Dahle, West Virginia University
Nan Nan, West Virginia University

Author ORCID Identifier

https://orcid.org/0000-0002-5566-4723

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https://orcid.org/0000-0001-7115-1154

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Document Type

Article

Publication Date

2018

College/Unit

Davis College of Agriculture, Natural Resources and Design

Department/Program/Center

Division of Forestry and Natural Resources

Abstract

A new type of Taiji honeycomb structure bonded outside with wood-based laminates was characterized from a mechanical standpoint. Both theoretical and experimental methods were employed to analyze comprehensively the deformation behavior and failure mechanism under a three-point bending test. The analytical analysis reveals that a Taiji honeycomb has 3.5 times higher strength in compression and 3.44 times higher strength in shear compared with a traditional hexagonal honeycomb. Considering the strength-weight issue, the novel structure also displays an increase in compression strength of 1.75 times and shear strength of 1.72 times. Under a three-point bending test, indentation and core shear failure played the dominant role for the total failure of a wooden sandwich with Taiji honeycomb core. Typical face yield was not observed due to limited thickness-span ratio of specimens. Large spans weaken the loading level due to the contribution of global bending stress in the compressive skin to indentation failure. A set of analytical equations between mechanical properties and key structure parameters were developed to accurately predict the threshold stresses corresponding to the onset of those deformation events, which offer critical new knowledge for the rational structure design of wooden sandwich composites.

Digital Commons Citation

Hao, Jingxin; Wu, Xinfeng; Oporto, Gloria; Wang, JIngxin; Dahle, Gregory; and Nan, Nan, "Deformation and Failure Behavior of Wooden Sandwich Composites with Taiji Honeycomb Core under a Three-Point Bending Test" (2018). Faculty & Staff Scholarship. 1339.
https://researchrepository.wvu.edu/faculty_publications/1339

Source Citation

Hao, J., Wu, X., Oporto, G., Wang, J., Dahle, G., & Nan, N. (2018). Deformation and Failure Behavior of Wooden Sandwich Composites with Taiji Honeycomb Core under a Three-Point Bending Test. Materials, 11(11), 2325. https://doi.org/10.3390/ma11112325

Comments

1. © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).