Evaluation of Failure Behaviour of Coated Anisotropic Materials for Dental Implants

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This paper presents the results of an experimental procedure where a grid is applied to the edge of a specimen and the local crack-tip displacement fields are calculated using finite element technique. Increasingly, the objective of finite element simulations is to predict the response of the mechanics of material failure are related to microstructural process that occur in the materials as a result of the loading conditions. At the same time, The influences of coating thickness, coating stiffness, and assume crack pattern on the stresses concentration between the neighbouring layers of material are evaluated. Consequently, one approach to simulating the response of structures is to explicity model the mechanisms of damage and failure in the material.

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Edited by:

M. Gupta and Christina Y.H. Lim

Pages:

23-26

Citation:

B. Punantapong et al., "Evaluation of Failure Behaviour of Coated Anisotropic Materials for Dental Implants", Journal of Metastable and Nanocrystalline Materials, Vol. 23, pp. 23-26, 2005

Online since:

January 2005

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$38.00

[1] D. Broek, Elementary Engineering fracture mechanics, Martinus Nijhoff Publishers, (1987).

[2] G.P. Carman, R.C. Averill, K.L. Reifsnider, and J.N. Reddy, Optimization of fiber coatings to minimize stress concentrations in composite materials, J. Comp. Mater, 27(1993), pp.589-611.

DOI: https://doi.org/10.1177/002199839302700603

[3] T.J. Copponnex, M. Desaeger, I. Verpoest, Determination of the interfacial fracture toughness of composites by the use of the fragmentation test., Proc. of ECCM-7, Woodhead Publishing, London, UK, Vol. 2, (1996) pp.23-28.

[4] J.H. Giovanola, S.W. Kirkpatrick, Using the local approach to investigate scaling effects in ductile fracture, Int. J. of Fracture, Vol. 92, No. 2 (1998) pp.101-107.

[5] B.S. Holmes, S.W. Kirkpatrick, J.W. Simons, J.H. Giovanola, L. Seaman, Modeling the process of failure in structures, Structural Crashworthiness and Failure, Elsevier Publishing Co. (1993).

[6] E. Jacobs, I. Verpoest., Finite element modeling of the stresses near a broken coated fibre in a unidirectional composite, Proc. of ECCM-7, Woodhead Publishing, London, UK, Vol. 1 (1996).

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[12] [10] 8642.

[14] [12] [10] [8] [6] [4] [2] G = 121 J/m2 G = 22 J/m2 r1/2 COD (microns) r (microns)x102 Fig. 3 Plots of crack opening displacement profiles as a function of r at different of GI and GIB which showing increase in displacements with addition of small load. Fig. 4 Plots of crack opening displacement profiles as a function of r at different of GIB which showing decrease in displacements with addition of small load. Fig. 5 Failure map of coated material. Normalised critical load P* = P/R2 dependent on ratio of layer thickness h to indenter radius R (h* = h/R) for a substrate yield strength of 1. 5 GPa and a film fracture strength of 15 GPa.

DOI: https://doi.org/10.1520/stp27210s

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[12] [10] 8642.

[7] [6] [5] [4] [3] [2] [1] GI = 35 J/m2 COD (microns) r (microns)x102 GIB = 62 J/m2 GI = 22 J/m2 GIB = 58 J/m2.

[14] [12] [10] 8642.

[4] [3] [2] [1] [2] [1] GIB = 33 J/m2 COD (microns) r (microns)x102 GIIB = 155 J/m2 GIB = 33 J/m2.

1000. 0 100. 0 10. 0 1. 0 0. 1 Normalized critical load, P*x106 in N/m2 Normalized layer thickness, h* 0. 1 1. 0 10. 0 100. 0 1000. 0 elestic region plastic deformation of substrate coating failure.

[2] / Eσ 2* hσ 2* hσ.

[2] / Eσ.