Y.X. Hu
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Z.Q. Yao
金属学报(英文版)
Finite element method is presented to attain the numerical simulation of residual stresses field in the material treated by laser shock processing. The distribution of residual stresses generated by single laser shock with square and round laser spot is predicted and validated by experimental results. With the FEM model, effects of different overlapping rates and impact sequences on the residual stresses distribution are simulated. And the results indicate that: (1) Overlapping laser shock can increase the compressive residual stresses. But it is not effective on the growth of plastically affected depth; (2) Overlapping rate should be optimized and selected carefully for the large area treatment. Appropriate overlapping rate is beneficial to obtain a homogeneous residual stress field; (3) Impact sequence has a great effect on the residual stress field. It can greatly attenuate the phenomenon of “residual stress hole” to obtain a homogeneous residual stress field.
关键词:
Laser shock processing
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H. Shen*
,
Z.Q. Yao
金属学报(英文版)
A mathematical model was established for the temperature field developed during high frequency induction heating (HFIH) by Maxwell's equations. It required solving the coupled equations of the electromagnetic and temperature fields. The numerical simulation was performed using FEMLAB. The comparison of the calculations using the proposed model with experimental results showed a very good correlation. The effects of the heating parameters in high frequency induction such as the distance between the plate and the coil, the applied current, the frequency, and the turns of the coil on the temperature profiles developed in the plate were also discussed using the established model.
关键词:
high frequency induction
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