Simulation on deforming progress and stress evolution during laser shock forming with finite element method

Zhang, Xingquan; She, Jianping; Li, Shengzhi; Duan, Shiwei; Zhou, Yu; Yu, Xiaoliu; Zheng, Rong; Zhang, Biao

doi:10.1016/j.jmatprotec.2015.01.004

Cited by 35 publications

(7 citation statements)

References 26 publications

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“…Meanwhile, in Figure 6, as can be seen, the region on the track contains a higher concentration of defects than at region between the tracks, therefore, Zhang et al and Kalita [19,27] reported a similar result. In Figure 6b, the distance between the tracks is approximately 300 μm, in this region we can note presence of several nanopores, which may be attributed to volatilization of inclusions or vaporization of the substrate itself, caused by hydrogen and moisture in atmospheric air, which they are absorbed in laser-treated region, favoring thus the formation of pores, these results are consistent such as reported by Yilbas et al and Pariona and Micene [5,8].…”

Section: Workpiece Microstructure By the Multi-track Overlapping By L...mentioning

confidence: 54%

Multi-Track Overlapping by Laser-Treated and Its Effects on the Microstructural Behavior of Al-Fe Alloy Assessed by FEM

Pariona¹

2023

Heat Transfer - Fundamentals, Enhancement and Applications

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In this work, a numerical simulation by finite element method (FEM) and optimized multigrid technology was applied. In order to study the influence of multi-track overlapping on the microstructure processed by laser surface remelting (LSR) and so, the validation of the experimental and the numerical simulation results of the multi-track overlapping were accomplished, which was the goal. It was verified in this work, multi-track overlapping and thermal cycling allied to high-speed cooling of liquid metalinfluence the liquid flow, mechanism of heat transport, and microstructure evolution in the molten pool of laser-treated alloy, promoting so a nanostructure characteristic. Thus, FEM is capable of accurately simulating the multi-track overlapping of the workpiece LSR-treated. Results of the overlapping ratio, as well as, the depth where the phase transformation occurs from liquid to solid was very nearby, therefore, simulation and experimental results agree quite well. This type of laser-treated alloy has very special characteristics and it is of innovative character, then, in aerospace, aeronautical, and automobile industries can be applied.

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Section: Workpiece Microstructure By the Multi-track Overlapping By L...mentioning

confidence: 54%

Multi-Track Overlapping by Laser-Treated and Its Effects on the Microstructural Behavior of Al-Fe Alloy Assessed by FEM

Pariona¹

2023

Heat Transfer - Fundamentals, Enhancement and Applications

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“…Therefore, prior to practical application of the dented parts, the mild polishing process is needed after laser shocking to remove or diminish the pile-up effect within the dented region. Obviously, if the pressure was applied to the thin plate, the whole section will be plastic deformed, and the flat sheet will be bulged (Zhang et al, 2018;Nagarajan et al, 2017;Zhang, She, Li, Duan, Zhou, Yu, Zheng and Zhang, 2015).…”

Section: Further Discussionmentioning

confidence: 99%

Experiment and numerical simulation of micro dent fabricated by laser shocking 2024 aluminum alloy

Fang

Zhang

et al. 2019

MMMS

Self Cite

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Purpose The purpose of this paper is to investigate the dynamic forming process of the micro dent fabricated by laser shock processing on 2024-T3 aluminum alloy. The effect of laser pluse energy on the deformation of micro dent was also discussed in detail. Design/methodology/approach It uses finite element analysis method and the corresponding laser shocking experiment. Findings The results demonstrate that the dynamic formation process of micro dent lasts longer in comparison with the shock wave loading time, and the depths of micro dents increase with the increasing laser energy. In addition, laser shocking with higher energy can result in more obvious pileup occurred at the outer edge of micro dent. Originality/value Surface micro dents can serve as fluid reservoirs and traps of the wear debris, which can decrease the effects of the wear and friction in rolling and sliding interfaces. The investigations can not only be propitious to comprehensively understand the forming mechanism of laser-shocked dent, but also be beneficial to get sight into the residual stress field induced by laser shocking.

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“…A spring back occurred because of the elasticity of the nickel and copper foils after the laser embossing. In addition, Zhang et al [49] also found the spring back in the simulation during the laser shock forming (LSF) process. They revealed that the workpiece will spring back to release the stored elastic energy and it acquires kinetic energy again.…”

Section: Deformation Depthmentioning

confidence: 99%

Experimental and Numerical Investigations of a Novel Laser Impact Liquid Flexible Microforming Process

Liu

Jiang

et al. 2018

Metals

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A novel high strain rate microforming technique, laser impact liquid flexible embossing (LILFE), which uses laser induced shock waves as an energy source, and liquid as a force transmission medium, is proposed by this paper in order to emboss three-dimensional large area micro arrays on metallic foils and to overcome some of the defects of laser direct shock microembossing technology. The influences of laser energy and workpiece thickness on the deformation characteristics of the pure copper foils with the LILFE process were investigated through experiments and numerical simulation. A finite element model was built to further understand the typical stages of deformation, and the results of the numerical simulation are consistent with those achieved from the experiments. The experimental and simulation results show that the forming accuracy and depth of the embossed parts increases with the increase in laser energy and decrease in workpiece thickness. The thickness thinning rate of the embossed parts increases with the decrease of the workpiece thickness, and the severest thickness thinning occurs at the bar corner region. The experimental results also show that the LILFE process can protect the workpiece surface from being ablated and damaged, and can ensure the surface quality of the formed parts. Besides, the numerical simulation studies reveal the plastic strain distribution of embossed microfeatures under different laser energy.

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Simulation on deforming progress and stress evolution during laser shock forming with finite element method

Cited by 35 publications

References 26 publications

Multi-Track Overlapping by Laser-Treated and Its Effects on the Microstructural Behavior of Al-Fe Alloy Assessed by FEM

Multi-Track Overlapping by Laser-Treated and Its Effects on the Microstructural Behavior of Al-Fe Alloy Assessed by FEM

Experiment and numerical simulation of micro dent fabricated by laser shocking 2024 aluminum alloy

Experimental and Numerical Investigations of a Novel Laser Impact Liquid Flexible Microforming Process

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