Assessment of Failure Strength of Real Alumina Foams with Use of the Periodic Structure Model

• Autorzy: Nowak M. , Nowak Z. , Pęcherski R. B. , Potoczek M. , Śliwa R. E.

Identyfikatory

DOI

10.24425/amm.2018.125122

• Języki publikacji: EN

Abstrakty

EN

The subject of the study are alumina foams produced by gelcasting method. The results of micro-computed tomography of the foam samples are used to create the numerical model reconstructing the real structure of the foam skeleton as well as the simplified periodic open-cell structure models. The aim of the paper is to present a new idea of the energy-based assessment of failure strength under uniaxial compression of real alumina foams of various porosity with use of the periodic structure model of the same porosity. Considering two kinds of cellular structures: the periodic one, for instance of fcc type, and the random structure of real alumina foam it is possible to justify the hypothesis, computationally and experimentally, that the same elastic energy density cumulated in the both structures of the same porosity allows to determine the close values of fracture strength under compression. Application of finite element computations for the analysis of deformation and failure processes in real ceramic foams is time consuming. Therefore, the use of simplified periodic cell structure models for the assessment of elastic moduli and failure strength appears very attractive from the point of view of practical applications.

Słowa kluczowe

EN

periodic cell structure; alumina open-cell foam; Young modulus; strength of alumina foams; Burzyński limit criterion

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 4
• Strony: 1903--1908
• Opis fizyczny: Bibliogr. 19 poz., fot., rys., tab., wzory

Twórcy

autor

Nowak M.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5b, 02-106 Warsaw, Poland

autor

Nowak Z.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5b, 02-106 Warsaw, Poland

autor

Pęcherski R. B.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5b, 02-106 Warsaw, Poland

autor

Potoczek M.

• Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Śliwa R. E.

• Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

Bibliografia

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Uwagi

EN

Financial support of Structural Funds in the Operational Program Innovative Economy (IE OP) financed from the European Regional Development Fund Project ”Modern material technologies in aerospace industry”, Nr POIG.01.01.02-00-015/08-00 is gratefully acknowledged.