TITLE

Modelling of micromechanical fracture using a cohesive finite element method

AUTHOR(S)
Zhou, Min; Zhai, Jun
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p623
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A micromechanical model is used to characterize material failure at the meso length scale. Numerical simulations are based on a cohesive finite element model. A bilinear cohesive law is used to characterize the process of material separation. This paper discusses the solution convergence of the numerical model. Crack tip cohesive zone size and the stiffness reduction introduced by embedded cohesive surfaces are found to significantly influence the solution convergence in the numerical implementation. Upper and lower bounds for the finite element size needed for mesh independence are obtained. Numerical examples are given to illustrate the solution convergence. The effect of interphase bounding strength on damage and failure mode in a ceramic composite microstructure is analyzed.
ACCESSION #
5985443

 

Related Articles

  • Strength and Fracture Toughness of Ceramic Materials for Metal-Ceramic Prosthetic Dentistry. Ostrovoi, D.; Gogotsi, G.; Gorban’, S.; Oshkaderov, S.; Stepkin, V.; Bobokal, A. // Strength of Materials;May2005, Vol. 37 Issue 3, p323 

    The strength in biaxial flexure and the fracture toughness on indentation of the specimens of ceramic materials for the coverage of metal-ceramic prostheses were studied. The strength was established to be mainly determined by their microstructure and sintering conditions. Comparative studies...

  • Does the casting mode influence microstructure, fracture and properties of different metal ceramic alloys? de Oliveira Bauer, José Roberto; Grande, Rosa Helena Miranda; Rodrigues-Filho, Leonardo Eloy; Pinto, Marcelo Mendes; Loguercio, Alessandro Dourado // Brazilian Oral Research;May/Jun2012, Vol. 26 Issue 3, p190 

    The aim of the present study was to evaluate the tensile strength, elongation, microhardness, microstructure and fracture pattern of various metal ceramic alloys cast under different casting conditions. Two Ni-Cr alloys, Co-Cr and Pd-Ag were used. The casting conditions were as follows:...

  • Modeling of ceramic microstructures: Dynamic damage initiation and evolution. Espinosa, Horacio D.; Zavattieri, Pablo D. // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p333 

    A model is presented for the dynamic finite element analysis of ceramic microstructures subjected to multi-axial dynamic loading. This model solves an initial-boundary value problem using a multi-body contact scheme integrated with interface elements to simulate microcracking at grain boundaries...

  • A numerical simulation of the R-curve behavior in microcracking materials. Murat, Michael; Englman, Robert; Jaeger, Zeev // Journal of Applied Physics;7/1/1991, Vol. 70 Issue 1, p158 

    Presents a study which proposed several models for crack propagation in ceramic materials with microcrack formation and coalescence. Method of the study; Results and discussion; Conclusion.

  • Effect of fine andalusite on the properties and microstructure of low-cement cordierite-mullite castables. Khezrabadi, M.; Arianpour, F.; Naghizadeh, R.; Nassiri, A.; Assadollahpour, P.; Mirhosseini, S. // Refractories & Industrial Ceramics;Nov2012, Vol. 53 Issue 4, p220 

    Results are presented from the development and study of cordierite-mullite panels which are based on low-cement refractory castables (LCC) and can be used as kiln furniture. Cordierite powder was synthesized from talc, kaolin, and alumina. Synthetic cordierite aggregate was used as the main...

  • Crack behavior of ballistically impacted ceramic. Meyer, Hubert W.; Abeln, Terri; Bingert, Sherri; Bruchey, William J.; Brannon, Rebecca M.; Chhabildas, Lalit C.; Dienes, John K.; Middleditch, John // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p1109 

    A hot isostatically pressed (HIP) assembly of titanium alloy encapsulated AD995 ceramic, subjected to ballistic impact, is studied in detail. The crack behavior of ceramic confined in this way is studied in a combined experimental and computational effort. Fabrication of the HIP assembly is...

  • Fracture mechanical analysis of open cell ceramic foams under multi-axial mechanical loading. Settgast, Christoph; Abendroth, Martin; Kuna, Meinhard // Archive of Applied Mechanics;Jan2016, Vol. 86 Issue 1/2, p335 

    Ceramic foams made by replica techniques contain sharp edged cavities, which are potential crack initiators. This paper presents an approach to analyse such structures with respect to their fracture mechanical properties. A fundamental domain of an open cell Kelvin foam is used to model the...

  • Failure mode transition in ceramics under dynamic multiaxial compression. Chen, W.; Ravichandran, G. // International Journal of Fracture;Jan2000, Vol. 101 Issue 1/2, p141 

    n experimental technique based on the Kolsky pressure bar has been developed to investigate the behavior of ceramics under dynamic multiaxial compression. Experimental results for aluminum nitride (AlN), together with data available in the literature, indicate that a Mohr-Coulomb criterion and...

  • Comparative study on indentation fracture toughness measurements of cemented carbides. Sergejev, Fjodor; Antonov, Maksim // Proceedings of the Estonian Academy of Sciences, Engineering;Dec2006, Vol. 12 Issue 4, p388 

    Majority of the fracture toughness studies of metallic materials typically use the Chevron notch technique, compact specimens and round notched tensile specimens. These methods require considerable time for sample preparation and for the notch geometry control. Only a few of them can be applied...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics