Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Nowak, Z.; Nowak, Marcin; Pȩcherski, R.B.; Potoczek, Marek; Śliwa, R. E.

doi:10.1515/amm-2015-0333

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…As seen in Fig. 16 , the results of this current work generally are also in a good agreement with the experimental data by Z. Nowak et al, who studied the elastic responses of alumina foams with porosity of 74-90% under compression loadings [42]. For smaller values of ε, however, Fig.…”

Section: Effec Ts Of Porosity (Or Relative Density)supporting

confidence: 90%

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Archives of Metallurgy and Materials

Nie

Lin

Tong

2018

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The work reports on the development of random three-dimensional Laguerre-Voronoi computational models for open cell foams. The proposed method can accurately generate foam models having randomly distributed parameter values. A three-dimensional model of ceramic foams having pre-selected cell volumes distribution with stochastic coordinates and orientations was created in the software package ANSYS TM . Different groups of finite element models were then generated using the developed foam modeling procedure. The size sensitivity study shows that each of foam specimens at least contains 125 LV-cells. The developed foam models were used to simulate the macroscopic elastic properties of open cell foams under uni-axial and bi-axial loading and were compared with the existing open cell foam models in the literature. In the high porosity regime, it is found that the elastic properties predicted by random Laguerre-Voronoi foam models are almost the same as those predicted by the perfect Kelvin foam models. In the low porosity regime the results of the present work deviate significantly from those of other models in the literature. The results presented here are generally in better agreement with experimental data than other models. Thus, the Laguerre-Voronoi foam models generated in this work are quite close to real foam topology and yields more accurate results than other open cell foam models.

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Section: Effec Ts Of Porosity (Or Relative Density)supporting

confidence: 90%

“…Ceramic foams made of alumina were investigated in this work. The Young's modulus E s and Poisson's ratio v s of the alumina were, respectively, taken to be 370 GPa and 0.22 [42]. Each strut of the foams was modeled by Timoshenko beam elements (i.e., element type Beam189 in ANSYS which is a three-node beam element).…”

Section: Finite Element Analysismentioning

confidence: 99%

Archives of Metallurgy and Materials

Nie

Lin

Tong

2018

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“…In the list above, several parameters appear: the distortional strain energy

, the volumetric strain energy

, and the thermal strain energy

. These classical energies are corrected by the influence functions

and

which are a kind of factors introducing new parameters into the criterion [ 12 , 16 , 26 , 27 ].…”

Section: The Materials Effort Description By the Energy Approachmentioning

confidence: 99%

Principles of Stress-Strength Modelling of the Highly Thermally Loaded Materials—The Influence of an Effect of Strength Differential on the Material Effort

et al. 2021

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This paper presents an improvement in the Huber–Mises–Hencky (HMH) material effort hypothesis proposed by Burzyński. Unlike the HMH hypothesis, it differentiates the plastic effort between compression and tensile load states, and links shear with tensile limit. Furthermore, it considers the fact that construction materials do not have infinite resistance in the pure tensile hydrostatic load state, which was proved by the static load experiment performed on St12T heat-resistant steel. The asymmetry between tensile and compressive loads is captured by the elastic region asymmetry coefficient ϰ, which was established by experiment for St12T steel in the temperature range between 20 °C and 800 °C.

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“…First, so‐called 3‐3 group was discovered and evaluated. Composites of this group consist of the ceramic skeleton, fabricated via replamine, 10 BURPS, 11 or gel‐casting 12,13 processes, which is further infiltrated by the polymer matrix. They possess some beneficial properties, such as a decoupling negative contribution from lateral stress, but their production process is rather complex 9 .…”

Section: Introductionmentioning

confidence: 99%

Design of piezoelectric nanogenerator based onBiFeO₃/epoxy resin with potential application for wearable electronic devices

Godzierz,

Masiuchok,

Talaniuk

et al. 2023

J of Applied Polymer Sci

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Growing demand for electric energy in newly developed electronic systems causes increasing interest in research on piezoelectric nanogenerators (PENGs). Design and fabrication of such devices is challenging, considering cost of materials used in their construction. This is the main reason why intensive research has begun on 0‐3 composites with piezoelectric properties. One of the most promising constituent materials for composites fabrication are polymers, due to their low cost and easy processing. Herein, we present fabricated wearable PENG with good impact and vibration energy conversion properties. Correlation between matrix stiffness and piezoelectric properties of 0‐3 type composite is proposed. It was found that composite with 10 wt.% of BiFeO3 particles exhibits power output density for vibrations, finger tapping, and air stream pressure P = 11.12 nW cm−3, P = 4.83 μW cm−3, and P = 769.2 μW cm−3, respectively. Decrease in stiffness of epoxy matrix results at least in two‐times lower power output density for this same PENG. The obtained results demonstrate that the fabricated BFO/epoxy composites show the wide applicability and potential to be integrated with other functional devices, for example, as a part of wearable devices in smart shoes.

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Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Cited by 9 publications

References 12 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Principles of Stress-Strength Modelling of the Highly Thermally Loaded Materials—The Influence of an Effect of Strength Differential on the Material Effort

Design of piezoelectric nanogenerator based onBiFeO₃/epoxy resin with potential application for wearable electronic devices

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Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Cited by 9 publications

References 12 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Principles of Stress-Strength Modelling of the Highly Thermally Loaded Materials—The Influence of an Effect of Strength Differential on the Material Effort

Design of piezoelectric nanogenerator based onBiFeO3/epoxy resin with potential application for wearable electronic devices

Contact Info

Product

Resources

About

Design of piezoelectric nanogenerator based onBiFeO₃/epoxy resin with potential application for wearable electronic devices