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The effect of first nonsingular stress term of elastic stress field on fracture toughness around bi-material notch tip is studies in this paper. First, a modified maximum tangential stress criterion (MMTS) is proposed for determination of the fracture toughness at the tip of the interface notches. | A modified maximum tangential stress criterion for determination of the fracture toughness in bi-material notches Part 1 Theory Engineering Solid Mechanics 2 2014 277-282 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm A modified maximum tangential stress criterion for determination of the fracture toughness in bi-material notches Part 1 Theory M. M. Mirsayar Zachry Department of Civil Engineering Texas A amp M University College Station TX 77843-3136 USA ARTICLE INFO ABSTRACT Article history The effect of first nonsingular stress term of elastic stress field on fracture toughness around bi- Received June 6 2014 material notch tip is studies in this paper. First a modified maximum tangential stress criterion Accepted 2 August 2014 MMTS is proposed for determination of the fracture toughness at the tip of the interface Available online notches. The proposed criterion takes into account the effect of first nonsingular stress term as 4 August 2014 Keywords well as the singular stress terms. Then the effect of I-stress on determination of the fracture Bi-material toughness is studied analytically. Finally the proposed criterion is applied on a finite element Notch FE simulated laboratory specimen. A very good correlation was observed between the FE Modified MTS criterion results and theoretical predictions. Fracture toughness 2014 Growing Science Ltd. All rights reserved. 1. Introduction Bi-material joints can be seen in many engineering applications ranging from civil and mechanical engineering to the microelectronics industries Chen et al. 1997 Dunn et al . 2000 Labossierea et al. 2002 Lu et al. 2002 . For instance ceramic metal ceramics and ceramic ceramic bonded joints are extensively used in airplane and aircraft bodies. At the interface of these bonded joints stress singularities exist as a result of geometrical configuration and or material discontinuity. Therefore the study of stress field around .
