Coating Interface Fracture Toughness Evaluation by a Combination of Edge Compression and Slinging Load

Abstract:

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Previous methods to measure interface fracture toughness between coating and substrate can't easily vary a phase angle as a mixed mode parameter. So that, the new coating interface fracture toughness test method, by which phase angle at interface crack tip can be varied due to applying a combination of compression loading to the coating edge and slinging such as beam bending, is proposed. The simple formula, which connects to complex stress intensity factors and double loading is firstly derived on the basis of the cracked beam model proposed by Suo and Hutchinson [1]. As an application of the method and associated formula, thermal barrier coating/super-alloy interface toughness is evaluated based on numerical analysis.

Info:

Periodical:

Key Engineering Materials (Volumes 261-263)

Edited by:

Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka

Pages:

435-440

DOI:

10.4028/www.scientific.net/KEM.261-263.435

Citation:

M. Arai et al., "Coating Interface Fracture Toughness Evaluation by a Combination of Edge Compression and Slinging Load", Key Engineering Materials, Vols. 261-263, pp. 435-440, 2004

Online since:

April 2004

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Price:

$35.00

[1] Z. Suo and J.W. Hutchinson, International Journal of Fracture, 43(1990) pp.1-18.

[2] P.G. Charalambides, J. Lund, A.G. Evans and R.M. McMeeking, Journal of Applied Mechanics, 56(1989) pp.77-82.

[3] H.C. Cao and A.G. Evans, Mechanics of Materials, 7(1989) pp.298-304.

[4] J.R. Rice, Transactions of the ASME, 55(1988) pp.98-103.

[5] J.G. Williams, Composites Science and Technology 35(1989) pp.367-376.

[6] C.F. Shih and R.J. Asaro, Journal of Applied Mechanics, 55(1988) pp.299-316.

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