Fabrication and finite element simulation of micro-laser shock peening for micro dents

Michael P. Sealy, Y. B. Guo

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

An innovative surface treatment process micro laser shock peening ( -LSP) has been developed in this study to fabricate micro dents on Ti-6Al-4V surfaces for improving tribology performance. A 3D finite element simulation model was also developed to investigate transient laser/material interactions at nano timescale during peening. The dynamic mechanical behavior was modeled using a user material subroutine of the internal state variable plasticity model. The temporal and spatial peening pressure was modeled using a user load subroutine. The simulated dent geometry agrees with the measured ones in terms of profile and depth. The results suggested that there is an optimal peening time for the deepest dent. The maximum transient stress in peening direction occurred at a certain pulse time.

Original languageEnglish (US)
Pages (from-to)134-142
Number of pages9
JournalInternational Journal of Computational Methods in Engineering Science and Mechanics
Volume10
Issue number2
DOIs
StatePublished - Mar 1 2009

Fingerprint

Shot peening
Finite Element Simulation
Shock
Fabrication
Tribology
Laser
Surface Treatment
Lasers
Mechanical Behavior
Plasticity
Dynamic Behavior
Subroutines
Simulation Model
Time Scales
Internal
Interaction
Surface treatment
Model
Geometry
Profile

Keywords

  • FEA
  • Laser Shock Peening
  • Mechanical Behavior
  • Shock Pressure
  • Surface Texture

ASJC Scopus subject areas

  • Computational Mechanics
  • Computational Mathematics

Cite this

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abstract = "An innovative surface treatment process micro laser shock peening ( -LSP) has been developed in this study to fabricate micro dents on Ti-6Al-4V surfaces for improving tribology performance. A 3D finite element simulation model was also developed to investigate transient laser/material interactions at nano timescale during peening. The dynamic mechanical behavior was modeled using a user material subroutine of the internal state variable plasticity model. The temporal and spatial peening pressure was modeled using a user load subroutine. The simulated dent geometry agrees with the measured ones in terms of profile and depth. The results suggested that there is an optimal peening time for the deepest dent. The maximum transient stress in peening direction occurred at a certain pulse time.",
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AB - An innovative surface treatment process micro laser shock peening ( -LSP) has been developed in this study to fabricate micro dents on Ti-6Al-4V surfaces for improving tribology performance. A 3D finite element simulation model was also developed to investigate transient laser/material interactions at nano timescale during peening. The dynamic mechanical behavior was modeled using a user material subroutine of the internal state variable plasticity model. The temporal and spatial peening pressure was modeled using a user load subroutine. The simulated dent geometry agrees with the measured ones in terms of profile and depth. The results suggested that there is an optimal peening time for the deepest dent. The maximum transient stress in peening direction occurred at a certain pulse time.

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