Laser forming of doubly curved plates using minimum energy principle and comprehensive strain control

Shen, Hong; Zhou, Wentao; Wang, Han

doi:10.1016/j.ijmecsci.2018.07.005

Cited by 17 publications

(5 citation statements)

References 24 publications

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“…This surface development method can be used to guide the loading trajectory for line heating method since it corresponds to forming from the planar shape to curved surface through plastic deformation. Shen et al also applied the minimum strain energy principle to guide the loading path for laser forming [19] .…”

Section: Loading Path Generationmentioning

confidence: 99%

Multi-point incremental bending of high strength steel plate with doubly curved surface under minimum strain energy loading path

Zhang

He²,

Wei³

et al. 2022

Preprint

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High strength steel plates with doubly curved surface in small batch have been widely applied in shipbuilding, aerospace, automobile and other manufacturing fields to meet the lightweight market demand. To achieve the doubly curved high strength steel plates with smaller forming force, the multi-point incremental bending process was proposed. In addition, to deform the high strength steel Q345B plates efficiently and accurately, the tools’ loading path strategy under the minimum strain energy field (that is, along the principle curvature direction) with considering the springback height was proposed. In this paper, the influence of single point bending-springback characterization at different bending positions and that with different incremental bending depths are analyzed based on experiments and numerical simulations to finally determine the whole springback height distribution for the entire high strength steel plate. Then the high strength steel plate with target doubly curved surface was deformed experimentally by the multi-point incremental bending experiments based on two kinds of tools’ loading paths according to whether considers the springback height of the high strength steel plate. The maximum loading forces and the absolute shape error were compared and analyzed. Results validated the reliability of the multi-point incremental bending experiment along the principle curvature direction with considering the springback height and the paper also puts forward the following up to be improved for the flexible incremental bending process in the future.

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Section: Loading Path Generationmentioning

confidence: 99%

Multi-point incremental bending of high strength steel plate with doubly curved surface under minimum strain energy loading path

Zhang

He²,

Wei³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The results show the dome height increased with increasing laser power, increasing line energy, increasing heat flux, decreasing beam diameter, decreasing thickness and decreasing scan speed. Shen et al [16,17] presented a scan strategy for the laser formation of double-curved shapes from single-curved shapes. By optimizing the strain energy and utilizing the minimum energy principle, the required strain distribution was calculated using finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Saddle-Shaped Surfaces by a Laser Forming Process: An Experimental and Statistical Investigation

Safari

Sousa

Joudaki

2020

Metals

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Laser forming is a powerful tool for fabricating complicated shapes economically. The pattern of laser movement (irradiating scheme) has an essential effect on the shaped form. In this article, the forming of a saddle-shaped surface will be investigated experimentally by the laser forming process. A spiral irradiating scheme is implemented to manufacture a saddle-shaped surface. The main idea of this study is the investigation of the simultaneous variations of the process parameters and their effect on the curvature of the final part. The process parameters of the study are the spiral pitch, number of spiral passes, and movement pattern (In-to-Out or reversely Out-to-In scanning path). The response surface methodology is selected for experimentation. The measurement of the deformation results shows that the deformations of laser-formed saddle-shaped surfaces decrease with an increase in the spiral pitch of the path. Additionally, the deformations of the saddle-shaped surface increase by increasing the number of spiral passes. The results demonstrate that the pattern movement has little effect on the deformations of laser-formed saddle-shaped surfaces and an Out-to-In spiral pattern movement is advised. At last, the proper input variables to obtain the maximum value of displacements for the saddle point are determined (10 mm spiral pitch, three spiral passes, and Out-to-In pattern movement).

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“…(a) Fabrication of a bowl shaped surface by laser forming[92], (Adapted from[92], with permission from Elsevier, 2020). (b) Origami Spoon[73], (Adapted from[73], with permission from Elsevier, 2020) (c) pillow, and warped shape[99], (Adapted from[99], with permission from Elsevier, 2020). (d) dome and saddle shaped surfaces[76,95].…”

mentioning

confidence: 99%

Recent Advances in the Laser Forming Process: A Review

Safari

Sousa

Joudaki

2020

Metals

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Laser forming is an emerging manufacturing process capable of producing either uncomplicated and complicated shapes by employing a concentrated heating source. The heat source movement creates local softening, and a plastic strain will be induced during the rise of temperature and the subsequent cooling. This contactless forming process may be used for the simple bending of sheets and tubes or fabrication of doubly-curved parts. Different studies have been carried out over recent years to understand the mechanism of forming and predicting the bending angle. The analysis of process parameters and search for optimized manufacturing conditions are among the most discussed topics. This review describes the main recent findings in the laser forming of single and multilayer sheets, composite and fiber-metal laminate plates, force assisted laser bending, tube bending by laser beam, the optimization technique implemented for process parameters selection and control, doubly-curved parts, and the analytical solutions in laser bending. The main focus is set to the researches published since 2015.

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Laser forming of doubly curved plates using minimum energy principle and comprehensive strain control

Cited by 17 publications

References 24 publications

Multi-point incremental bending of high strength steel plate with doubly curved surface under minimum strain energy loading path

Multi-point incremental bending of high strength steel plate with doubly curved surface under minimum strain energy loading path

Fabrication of Saddle-Shaped Surfaces by a Laser Forming Process: An Experimental and Statistical Investigation

Recent Advances in the Laser Forming Process: A Review

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