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Experimental and DEM investigation of axially-loaded behaviours of IWP-based structures.
- Source :
-
International Journal of Mechanical Sciences . Dec2022, Vol. 235, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • 3D IWP minimal surface structures have been modeled and validated. • 3D printed IWP specimens have been established and experimentally tested. • Structural performance of the cellular unit has been assessed thoroughly. • Failure modes have been identified for the first time. • Discrete element modeling has been established to model the damage and failure of the structure. The Schoen I-graph-wrapped package (IWP) structures are recognized as one of the best promising cellular structures because of their high specific mechanical properties and damping ratios. The axially-loaded behaviors are critical for structural safety and durability in engineering fields. In order to extend the application of IWP structures into civil engineering, this paper investigated the axially-loaded behaviors, including compressive strength, force distribution, load-deflection pattern, energy absorption and cracking pattern, of the main and secondary Skeletal-IWP structures. Firstly, a novel method for simplifying triply periodic minimal surfaces (TPMSs) has been put forward. Then the main and secondary Skeletal-IWP units are fabricated using stereolithography technology and tested. The discrete element method (DEM) is adopted, for the first time, to simulate the axially-loaded behaviors of IWP structures with different unit cell arrangements after the validation by robust experimental results. The results reveal that the secondary Skeletal-IWP structures outperform the main Skeletal-IWP structures in compressive strength. When the unit arrangement changes from single unit to 7 × 7 × 7, the compressive strength of the main and secondary Skeletal-IWP structures increases from 9 MPa to 13.4 MPa and 9.2 MPa to 14.4 MPa, respectively. The main type shows a "X"-shaped cracking pattern, and the secondary shows a "X"-shaped cracking pattern. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00207403
- Volume :
- 235
- Database :
- Academic Search Index
- Journal :
- International Journal of Mechanical Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 160048158
- Full Text :
- https://doi.org/10.1016/j.ijmecsci.2022.107738