Mismatch Constraint Effect for Bimaterial Interfacial Creep Crack

Abstract:

Mismatch effect of weldments is important for the assessment of structural integrity at elevated temperature. The interfacial creep crack is a common model which can be found in lots of engineering practices. Recently, the constraint effect is also considered to be significant for the evaluation of creep crack growth under high temperature. In this paper, a model for bimaterial interfacial creep crack is introduced to study the mismatch constraint effect. The stress field for bimaterial interfacial creep crack is investigated. An M^*-parameter is proposed to characterize the constraint effect caused by material mismatch for bimaterial creep crack. A comparison is made between the geometry constraint caused by specimen loading and mismatch constraint caused by inhomogeneous material.

• Periodical: Applied Mechanics and Materials (Volume 853)
• Pages: 286-290
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.853.286
• Online since: September 2016
• Authors: Yan Wei Dai, Ying Hua Liu*, Hao Feng Chen
• Keywords: Bimaterial Interfacial Crack, Constraint Effect, Creeping Mismatch, M¤-Parameter

References

[1] Yang J, Wang G, Xuan F, Tu S, Liu C. Out-of-plane constraint effect on local fracture resistance of a dissimilar metal welded joint. Materials & Design. 55(2014)542-50.

DOI: 10.1016/j.matdes.2013.10.034

[2] Budden P, Ainsworth R. The effect of constraint on creep fracture assessments. International Journal of Fracture. 87 (1997)139-49.

[3] Biner SB. A numerical analysis of time dependent stress fields ahead of stationary interface cracks at creep regime—Part I. Interface cracks in bimaterials. Engineering Fracture Mechanics. 56(1997)513-29.

DOI: 10.1016/s0013-7944(96)00116-6

[4] Hui C-Y, Saif M. Asymptotic stress field of a mode III crack growing along an elastic/elastic power-law creeping bimaterial interface. Journal of Applied Mechanics. 61 (1994) 384-9.

DOI: 10.1115/1.2901455

[5] Lee H, Kim Y-J. Interfacial crack-tip constraints and J-integrals in plastically mismatched bi-materials. Engineering Fracture Mechanics. 68(2001)1013-31.

DOI: 10.1016/s0013-7944(01)00007-8

[6] Ngampungpis K, Kitamura T, Hirakata H. Effect of Material Thickness on the Singular Stress Field in Elastic-creep Bi-material Interface. Journal of Solid Mechanics and Materials Engineering. 1(2007)744-54.

DOI: 10.1299/jmmp.1.744

[7] Yoon K, Kim K. High temperature fracture parameter for a weld interface crack. Theoretical and Applied Fracture Mechanics. 32(1999)27-35.

DOI: 10.1016/s0167-8442(99)00023-3

[8] Zerbst U, Ainsworth RA, Beier HT, Pisarski H, Zhang ZL, Nikbin K, et al. Review on fracture and crack propagation in weldments – A fracture mechanics perspective. Engineering Fracture Mechanics. 132(2014)200-76.

DOI: 10.1016/j.engfracmech.2014.05.012

[9] Yang J, Wang G, Xuan F, Tu S. Unified correlation of in-plane and out-of-plane constraint with fracture resistance of a dissimilar metal welded joint. Engineering Fracture Mechanics. 115(2014)296-307.

DOI: 10.1016/j.engfracmech.2013.11.018

[10] Yamamoto M, Miura N, Ogata T. Effect of constraint on creep crack propagation of mod. 9Cr-1Mo steel weld joint. ASME 2009 Pressure Vessels and Piping Conference: ASME (2009)1533-1539.

DOI: 10.1115/pvp2009-77862

[11] Dai Y, Liu D, Liu Y. Mismatch Constraint effect of creep crack with modified boundary layer model. Journal of Applied Mechanics. 83(2016)031008-16.

DOI: 10.1115/1.4032025

[12] Dai Y, Liu Y, Chen H. Characterization of mismatch constraint effect for interfacial creep crack with two parameters approach. Engineering Fracture Mechanics. 2016: under review.

[13] Zhang Z, Hauge M, Thaulow C. Two-parameter characterization of the near-tip stress fields for a bi-material elastic-plastic interface crack. International Journal of Fracture. 79(1996)65-83.

DOI: 10.1007/bf00017713