Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Decomposition of Interfacial Crack Driving Forces in Dissimilar Joints

  • Kim, Yun-Jae (GKSS Research Center, Institute of Materials Research, Germany) ;
  • Lee, Hyung-Yil (Department of Mechanical Engineering, Sogang University)
  • Published : 2000.01.01
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Abstract

This paper presents a framework how to estimate crack driving forces in terms of crack-tip opening displacement and J-integral for mismatched dissimilar joints with interface cracks. The mismatch in elastic, thermal, and plastic hardening properties is not considered, but the mismatch in plastic yield strengths is emphasized here. The main outcome of the present work is that the existing methods to estimate crack driving forces for homogeneous materials can be used with slight modification. Such modification includes (i) mismatch- corrected limit load solutions, and (ii) evaluating the contribution of each material in dissimilar joints to the total crack driving force, which depends on the strength mismatch of the dissimilar joints.

Keywords

References

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