Numerical Study of Laser Shock Peening Effects on Alloy 600 Nozzles with Initial Residual Stresses

Ji Soo Kim, Hyun Suk Nam, Yun Jae Kim, Ju Hee Kim

研究成果: Article

5 引用 (Scopus)

抄録

This paper investigates the effect of initial residual stress and prestrain on residual stresses due to laser shock peening for Alloy 600 using numerical simulation. For simulation, the strain rate dependent Johnson-Cook hardening model with a Mie-Grüneisen equation of state is used. Simulation results are compared with published experimental data, showing good agreement. It is found that the laser shock peening (LSP) process is more effective for higher initial tensile residual stress and for larger initial prestrain in terms of compressive stress at the near surface. However, the effective depth decreases with increasing initial tensile residual stress and initial prestrain.

元の言語English
記事番号041406
ジャーナルJournal of Pressure Vessel Technology, Transactions of the ASME
139
発行部数4
DOI
出版物ステータスPublished - 2017 8 1
外部発表Yes

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Shot peening
Residual stresses
Nozzles
Lasers
Tensile stress
Compressive stress
Equations of state
Hardening
Strain rate
Computer simulation

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

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abstract = "This paper investigates the effect of initial residual stress and prestrain on residual stresses due to laser shock peening for Alloy 600 using numerical simulation. For simulation, the strain rate dependent Johnson-Cook hardening model with a Mie-Gr{\"u}neisen equation of state is used. Simulation results are compared with published experimental data, showing good agreement. It is found that the laser shock peening (LSP) process is more effective for higher initial tensile residual stress and for larger initial prestrain in terms of compressive stress at the near surface. However, the effective depth decreases with increasing initial tensile residual stress and initial prestrain.",
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AU - Kim, Ju Hee

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AB - This paper investigates the effect of initial residual stress and prestrain on residual stresses due to laser shock peening for Alloy 600 using numerical simulation. For simulation, the strain rate dependent Johnson-Cook hardening model with a Mie-Grüneisen equation of state is used. Simulation results are compared with published experimental data, showing good agreement. It is found that the laser shock peening (LSP) process is more effective for higher initial tensile residual stress and for larger initial prestrain in terms of compressive stress at the near surface. However, the effective depth decreases with increasing initial tensile residual stress and initial prestrain.

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KW - welding residual stress

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