3D Dynamic Finite Element Analysis of the Nonuniform Residual Stress in Ultrasonic Impact Treatment Process

Hu, Shengsun; Guo, Chaobo; Wang, Dongpo; Wang, Zhijiang

doi:10.1007/s11665-016-2206-1

Cited by 10 publications

(1 citation statement)

References 15 publications

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“…They found that the increase of the pin initial velocity, the pin diameter and length led to a nonlinear increase in the depth of penetration, as well as the magnitude of the maximum compressive residual stresses. Hu et al [24] simulated the successive impacts of five impact rows with a speed-based impact model. They pointed out that the continuous impact process during UIT was not a simple overlay of the multiple one-impact, in which it made the plastic deformation more homogeneous and reduced the maximum compressive residual stresses below the previous impact.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment

et al. 2020

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In this study, the effects of ultrasonic impact treatment (UIT) on the residual stress in a repair welding joint are investigated by experimental and finite element methods. A three-dimensional numerical analysis approach including a thermomechanical-coupled welding simulation and dynamic elastic-plastic UIT simulation is developed, which has been validated by X-ray diffraction measurement and indentation strain method. The results show that longitudinal residual stresses basically turned into the small tensile stress state from the large tensile stress state, and transverse residual stresses have mainly turned into compressive stresses from large tensile stress after the UIT. In the thickness direction, the average decrease of longitudinal residual stress is 259.9 MPa, which is larger than the 149.1 MPa of transverse residual stress. The calculated residual stress distribution after the UIT of the thin plate is compared with that of the thick plate in the literature, with the results showing the stress accumulation layer inside the thick plate. The simulation results show that the elastic strains are decreased slightly and the equivalent plastic strain is increased markedly after UIT, which explains the mechanism of residual stress relaxation.

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Section: Introductionmentioning

confidence: 99%