Detail publikace

Computational Analysis of Crack-Like Defects Influence on the Open Cell Ceramic Foam Tensile Strength

ŠEVEČEK, O. MAJER, Z. MARCIÁN, P. BERTOLLA, L. KOTOUL, M.

Originální název

Computational Analysis of Crack-Like Defects Influence on the Open Cell Ceramic Foam Tensile Strength

Anglický název

Computational Analysis of Crack-Like Defects Influence on the Open Cell Ceramic Foam Tensile Strength

Jazyk

en

Originální abstrakt

This work deals with a computational analysis and quantification of the influence of processing (primarily crack-like) defects of various amount on the (tensile) strength of open cell ceramic foam structures. This information is essential e.g. for application of these materials in the mechanically loaded application, where a design with certain reliability to operating conditions is required. The analysed ceramic foam structures are composed of both regular and irregular cells and crack-like defects (pre-cracked struts) are simulated inside them. The foam structure is modelled using a 3D FE beam element based model created by utilization of the Voronoi tessellation technique. The tensile strength upon presence of various amount of pre-cracked struts is analysed based upon an iterative FE simulation on whose base the critical failure force leading to specimen fracture is determined. The performed parametric study relates the tensile strength of the foam structure to the amount of initial defects. With increasing amount of these defects, the foam strength decreases by approximately 30% with every 10% of broken struts. This information can be directly used for a fast estimation of the foam tensile strength if the fraction of broken struts to the intact ones is known (e.g. from a microscopic analysis).

Anglický abstrakt

This work deals with a computational analysis and quantification of the influence of processing (primarily crack-like) defects of various amount on the (tensile) strength of open cell ceramic foam structures. This information is essential e.g. for application of these materials in the mechanically loaded application, where a design with certain reliability to operating conditions is required. The analysed ceramic foam structures are composed of both regular and irregular cells and crack-like defects (pre-cracked struts) are simulated inside them. The foam structure is modelled using a 3D FE beam element based model created by utilization of the Voronoi tessellation technique. The tensile strength upon presence of various amount of pre-cracked struts is analysed based upon an iterative FE simulation on whose base the critical failure force leading to specimen fracture is determined. The performed parametric study relates the tensile strength of the foam structure to the amount of initial defects. With increasing amount of these defects, the foam strength decreases by approximately 30% with every 10% of broken struts. This information can be directly used for a fast estimation of the foam tensile strength if the fraction of broken struts to the intact ones is known (e.g. from a microscopic analysis).

Dokumenty

BibTex


@inproceedings{BUT149860,
  author="Oldřich {Ševeček} and Zdeněk {Majer} and Petr {Marcián} and Luca {Bertolla} and Michal {Kotoul}",
  title="Computational Analysis of Crack-Like Defects Influence on the Open  Cell Ceramic Foam Tensile Strength",
  annote="This work deals with a computational analysis and quantification of the influence of processing (primarily crack-like) defects of various amount on the (tensile) strength of open cell ceramic foam structures. This information is essential e.g. for application of these materials in the mechanically loaded application, where a design with certain reliability to operating conditions is required. The analysed ceramic foam structures are composed of both regular and irregular cells and crack-like defects (pre-cracked struts) are simulated inside them. The foam structure is modelled using a 3D FE beam element based model created by utilization of the Voronoi tessellation technique. The tensile strength upon presence of various amount of pre-cracked struts is analysed based upon an iterative FE simulation on whose base the critical failure force leading to specimen fracture is determined. The performed parametric study relates the tensile strength of the foam structure to the amount of initial defects. With increasing amount of these defects, the foam strength decreases by approximately 30% with every 10% of broken struts. This information can be directly used for a fast estimation of the foam tensile strength if the fraction of broken struts to the intact ones is known (e.g. from a microscopic analysis).",
  address="Trans Tech Publications",
  booktitle="Advances in Fracture and Damage Mechanics XVII",
  chapter="149860",
  doi="10.4028/www.scientific.net/KEM.774.271",
  howpublished="online",
  institution="Trans Tech Publications",
  number="1",
  year="2018",
  month="august",
  pages="271--276",
  publisher="Trans Tech Publications",
  type="conference paper"
}