Variations of In-Plane Mechanical Properties of Cellular Structures With Different Hierarchical Organizations

2021 ◽  
Author(s):  
Tanvir Faisal ◽  
Souvik Chakraborty ◽  
Dylan Hebert
Keyword(s):  
Mechanical Properties ◽  
Cellular Structures ◽  
Hierarchical Organizations

Variations of In-Plane Mechanical Properties of Cellular Structures With Different Hierarchical Organizations

2020 ◽  
Author(s):  
Souvik Chakraborty ◽  
Dylan Hebert ◽  
Tanvir Rahman Faisal
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Hierarchical Structure ◽  
Unit Cell ◽  
Cellular Structures ◽  
Initial Shape ◽  
Unit Cells ◽  
Cell Topology ◽  
Homogeneous Cell ◽  
Hierarchical Organizations

Abstract Inspired by the nature, this study analyzes in-plane compressive responses of different modes of hierarchical architected structures with varying topologies. Architected cellular structures with two different unit cell topologies — square and kagome are considered, both having a relative density of 0.25. Each unit cell topology is designed with three different configurations. The base structure is the primitive one with solid homogeneous cell wall. The nested hierarchical structure is derived from the primitive one with cellular structuring in the cell wall. The third and final one is the fractal-like hierarchical structure, where same unit cells appear on different length scales. 3D printed structures were subjected to uniaxial compression to characterize their in-plane mechanical properties. The compressive stress-strain behaviors reveal that all the structures demonstrate the classical behavior of cellular structures followed by significant recovery of their initial shape upon load withdrawal. The energy absorptions demonstrated by the plateau regions before densification are not only governed by their structural topologies, but also largely governed by the configurations of hierarchical organizations. Hence, this study suggests the application specific design of hierarchical architected structures for defined loading conditions.

scholarly journals Preparation and properties of silicone rubber materials with foam/solid alternating multilayered structures

2021 ◽  
Author(s):  
Wenhuan Zhang ◽  
Zhaoping Deng ◽  
Hongwei Yuan ◽  
Shikai Luo ◽  
Huayin Wen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Silicone Rubber ◽  
Cellular Structure ◽  
Cellular Structures ◽  
Compressive Property ◽  
Solid Layer ◽  
Multilayered Structures ◽  
Element Analysis ◽  
Morphology And Mechanical Properties

AbstractIn this paper, silicone rubber materials with foam/solid alternating multilayered structures were successfully constructed by combining the two methods of multilayered hot-pressing and supercritical carbon dioxide (SCCO2) foaming. The cellular morphology and mechanical properties of the foam/solid alternating multilayered silicone rubber materials were systematically studied. The results show that the growth of the cell was restrained by the solid layer, resulting in a decrease in the cell size. In addition, the introduction of the solid layer effectively improved the mechanical properties of the microcellular silicone rubber foam. The tensile strength and compressive strength of the foam/solid alternating multilayered silicone rubber materials reached 5.39 and 1.08 MPa, which are 46.1% and 237.5% of the pure silicone rubber foam, respectively. Finite element analysis (FEA) was applied and the results indicate that the strength and proportion of the solid layer played important roles in the tensile strength of the foam/solid alternating multilayered silicone rubber materials. Moreover, the small cellular structures in silicone rubber foam can provided a high supporting counterforce during compression, meaning that the microcellular structure of silicone rubber foam improved the compressive property compared to that for the large cellular structure of silicone rubber foam.

scholarly journals Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling

2016 ◽  
Vol 80 ◽  
pp. 26-35 ◽  
Author(s):  
Leandra Oliveira-Salmazo ◽  
Alberto Lopez-Gil ◽  
Felipe Silva-Bellucci ◽  
Aldo E. Job ◽  
Miguel A. Rodriguez-Perez
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Cellular Structures

scholarly journals Mechanics of Microfilaments Networks: A Cross-Scales Study

2014 ◽  
Vol 553 ◽  
pp. 310-315
Author(s):  
Tong Li ◽  
Yuan Tong Gu ◽  
Bao Cheng Zhang
Keyword(s):  
Mechanical Properties ◽  
Molecular Mechanisms ◽  
Mechanical Stability ◽  
Dynamics Simulation ◽  
Coarse Grained ◽  
Cellular Structures ◽  
Modelling Framework ◽  
Simulation Strategy ◽  
Mechanical Models ◽  
Mechanical Behaviours

The mechanical properties of microfilament networks are systematically summarized at different special scales in this paper. We have presented the mechanical models of single microfilaments and microfilament networks at microscale. By adopting a coarse-grained simulation strategy, the mechanical stability of microfilaments related cellular structures are analysed. Structural analysis is conducted to microfilament networks to understand the stress relaxation under compression. The nanoscale molecular mechanisms of the microfilaments deformation is also summarized from the viewpoint of molecular dynamics simulation. This paper provides the fundaments of multiscale modelling framework for the mechanical behaviours simulation of hierarchical microfilament networks.

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