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A New Way of Implementing the Stiffness Derivative Method for Determining Stress Intensity Factors

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Abstract

A new procedure for implementing the stiffness derivative method for evaluating stress intensity factor is proposed. Unlike the original approach, the proposed method involves the nodal displacements and strain energies of the crack-tip elements only. The undesirable need to extract element stiffness matrices in the original approach is removed. The proposed approach can be easily implemented using commercial finite element packages.

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References

  • Banks-Sills, L. and Shemian, D. (1986), Comparison of methods for calculating stress intensity factors with quarter-point elements. International Journal of Fracture¶d32, 127-140

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Authors and Affiliations

  1. Department of Mechanical Engineering, The Hong Kong Polytechnic University Hunghom, Kowloon, Hong Kong

    S.W. Ng

  2. Department of Mechanical Engineering, The Hong Kong Polytechnic University Hunghom, Kowloon, Hong Kong

    K.J. Lau

Authors
  1. S.W. Ng
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  2. K.J. Lau
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Ng, S., Lau, K. A New Way of Implementing the Stiffness Derivative Method for Determining Stress Intensity Factors. International Journal of Fracture 102, 29–32 (2000). https://doi.org/10.1023/A:1007617114446

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  • DOI: https://doi.org/10.1023/A:1007617114446

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