Simplified semi-analytical method to calculate N-SIF of anisotropic composite plate with single edge notch

Wei Shen, Zishuo Wang, Kai Qin, Heqi Fu, Enqian Liu

Research output: Contribution to journalArticlepeer-review


In order to simplify the assessment method of notch stress and N-SIF for single edge V-notched orthotropic composite plate, a semi-analytical formula based on equivalent intensity factor was presented based on linear elastic fracture mechanics. By equating geometric parameters, opening angle and material parameters as equivalent intensity factors of anisotropic composite materials, the theoretical formulas of notch stress field and N-SIF are simplified. On the basis of theoretical simplified formula, the equivalent intensity factor formula can be obtained by fitting a large number of numerical models for rapid evaluation of notch stress field. Furthermore, the relationship between equivalent intensity factor and N-SIF is constructed to quickly calculate the N-SIF of anisotropic composite materials. The error statistical results show that the dimensionless N-SIF obtained by the simple formula in this paper has high accuracy for anisotropic materials and can be applied to composite plates with different material parameters.
Original languageEnglish
Article number114953
Number of pages21
JournalComposite Structures
Early online date10 Nov 2021
Publication statusPublished - 15 Jan 2022


  • orthotropic composite material plate
  • single edge V-notch
  • stress singularity
  • stress intensity factor (SIF)
  • notch stress intensity factor (N-SIF)
  • stress intensity factors
  • fatigue-strength
  • V-notch
  • joints
  • fields
  • front
  • crack


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