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<p>A numerical evaluation of the influence of laser shock peening (LSP) on the critical distance in cylindrical specimens made of commercially pure titanium Grade 2 was conducted within the framework of the point method of the theory of critical distances (TCD). Modeling of residual stress field formation was performed using the straightforward Johnson–Cook model. Validation of the numerical model was carried out by comparing calculated residual stress profiles with experimental measurements obtained by the hole-drilling method. It was shown that LSP generates compressive residual stress up to 570&#xa0;MPa at depths up to 0.77&#xa0;mm. The critical distance increases by 12%. The validity of the TCD method was confirmed experimentally. The model yielded high accuracy for untreated specimens with a 3.5% error and correctly captured the qualitative trend toward a decrease in fracture load after LSP treatment, showing a 10% discrepancy.</p>

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Assessment of the critical distance magnitude after laser shock peening

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Igor Kudryashev,
  • Anastasia Iziumova,
  • Mariia Bartolomei,
  • Aleksei Vshivkov,
  • Mikhail Ugolnikov,
  • Alena Vedernikova,
  • Oleg Plekhov

摘要

A numerical evaluation of the influence of laser shock peening (LSP) on the critical distance in cylindrical specimens made of commercially pure titanium Grade 2 was conducted within the framework of the point method of the theory of critical distances (TCD). Modeling of residual stress field formation was performed using the straightforward Johnson–Cook model. Validation of the numerical model was carried out by comparing calculated residual stress profiles with experimental measurements obtained by the hole-drilling method. It was shown that LSP generates compressive residual stress up to 570 MPa at depths up to 0.77 mm. The critical distance increases by 12%. The validity of the TCD method was confirmed experimentally. The model yielded high accuracy for untreated specimens with a 3.5% error and correctly captured the qualitative trend toward a decrease in fracture load after LSP treatment, showing a 10% discrepancy.