Role of cell regularity and relative density on elasto-plastic compression response of random honeycombs generated using Voronoi diagrams

Sotomayor, Oscar; Tippur, Hareesh V.

doi:10.1016/j.ijsolstr.2014.07.009

Cited by 32 publications

(18 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More cell walls were bent when the materials were subjected to an external force. Therefore, more energy was absorbed [34]. Further increases of SC concentrations caused an excessive growth of cells, resulting in cell merger and collapse.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Porous Polyamide 6 by Solution Foaming: Synthesis, Characterization and Properties

Wang

et al. 2018

Polymers

View full text Add to dashboard Cite

Porous polym er materials have received great interest in both academic and industrial fields due to their wide range of applications. In this work, a porous polyamide 6 (PA6) material was prepared by a facile solution foaming strategy. In this approach, a sodium carbonate (SC) aqueous solution acted as the foaming agent that reacted with formic acid (FA), generating CO2 and causing phase separation of polyamide (PA). The influence of the PA/FA solution concentration and Na2CO3 concentration on the microstructures and physical properties of prepared PA foams were investigated, respectively. PA foams showed a hierarchical porous structure along the foaming direction. The mean pore dimension ranged from hundreds of nanometers to several microns. Low amounts of sodium salt generated from a neutralization reaction played an important role of heterogeneous nucleation, which increased the crystalline degree of PA foams. The porous PA materials exhibited low thermal conductivity, high crystallinity and good mechanical properties. The novel strategy in this work could produce PA foams on a large scale for potential engineering applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Hierarchical Porous Polyamide 6 by Solution Foaming: Synthesis, Characterization and Properties

Wang

et al. 2018

Polymers

View full text Add to dashboard Cite

show abstract

“…The properties of non-homogeneous materials depend on the links between the different length scales and the complexity of each substructure [31][32][33]. For instance, heterogeneities induce randomness and affect both the local and the overall mechanical behavior of materials.…”

Section: Constitutive Formulationmentioning

confidence: 99%

Stochastic finite element analysis of the diametral compression test of powder compacts and porous materials

Alvarado-Contreras¹,

Lopez-Inojosa²

2021

Preprint

View full text Add to dashboard Cite

This paper presents a stochastic finite element approach for modeling the mechanical behavior of powder compacts and porous materials under diametral compression test conditions. The main goal is assessing the validity of the diametral compression test as an indirect technique to estimate tensile strengths of brittle or quasi-brittle materials exhibiting porosity heterogeneity. Thus, the study seeks to predict the influence of porosity randomness on stress distributions and the spatial location of the highest tensile stress on thin disc-shaped specimens. The proposed formulation uses a stochastic framework that couples a random spatial field to the finite element analysis to include non-deterministic features. Two case studies consider comparable targets for the mean porosity but different coefficients of variations. For each case study, a total of 1000 realizations are conducted under identical loading and boundary conditions. The predicted stress distributions are compared to the ones from homogenous closed-form solutions from the literature. Then, the expected magnitude and location of the maximum tensile stress are evaluated by statistical means. Findings from the stochastic model show that porosity randomness induces stress concentration around less dense volumes and location deviation of the maximum tensile stress from the center of the discs. Likewise, porosity heterogeneity could affect the accuracy of experimental diametral compression tests even for small variance cases; and so, the reliability of the mechanical properties derived from models based exclusively on the classic assumption of material homogeneity.

show abstract

“…These studies all illustrate that the shock wave theory can capture the impact crushing response of foam materials effectively. Numerically, finite element (FE) analyses based on the periodic Voronoi model [14][15][16] and hollow spheres model [17] were carried out to explain the dynamic crushing behavior of foam materials. In addition, various dynamic compression and impact experiments on foam materials were also conducted to quantify their impact responses and energy absorption characteristics [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Impact response and energy absorption of functionally graded foam under temperature gradient environment

Liu

Ding

2019

Composites Part B: Engineering

View full text Add to dashboard Cite

Role of cell regularity and relative density on elasto-plastic compression response of random honeycombs generated using Voronoi diagrams

Cited by 32 publications

References 24 publications

Hierarchical Porous Polyamide 6 by Solution Foaming: Synthesis, Characterization and Properties

Hierarchical Porous Polyamide 6 by Solution Foaming: Synthesis, Characterization and Properties

Stochastic finite element analysis of the diametral compression test of powder compacts and porous materials

Impact response and energy absorption of functionally graded foam under temperature gradient environment

Contact Info

Product

Resources

About