Constitutive modeling and deformation analysis for the ultrasonic-assisted incremental forming process

Li, Yanle; Cheng, Zinan; Chen, Xiaoxiao; Long, Yangyang; Li, Xiaoqiang; Li, Fangyi; Li, Jianfeng; Twiefel, Jens

doi:10.1007/s00170-019-04031-3

Cited by 24 publications

(4 citation statements)

References 28 publications

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“…(3) A similar work was carried out by Li et al [9]. An exponential function was used to correct the dislocation storage coefficient, k 1 :…”

Section: Models Based On Physical Mechanismmentioning

confidence: 99%

“…The predicted stress-strain response of the vibrationassisted upsetting agreed well with the experimental results. To reflect the influence of the dislocation density on the acoustic softening effect, Li and Deshpande et al [9,36] modified k 1 and k 2 , which are respectively the coefficients of the dislocation storage term that causes thermal hardening and the dislocation annihilation term accounting for the dynamic recovery. The relationship between the mechanical threshold τ and dislocation density ρ was established based on the K-M model.…”

Section: Comparison Of Different Modelsmentioning

confidence: 99%

“…With the development of advanced technologies, such as microscopic observation and numerical simulation, there has been extensive ongoing research on the mechanism and modeling of ultrasonic-assisted forming. In addition, UV has been applied to an increasing number of advanced forming processes, such as incremental forming, spinning, and microforming [9][10][11]. Therefore, it is necessary to systematically summarize the latest developments in the field of ultrasonic-assisted forming and to analyze their advantages and limitations in order to facilitate fast referencing for researchers.…”

Section: Introductionmentioning

confidence: 99%

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A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

Shao

Zhan

2021

Chin. J. Mech. Eng.

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Compared with conventional forming processes, ultrasonic-assisted forming technology with a high frequency and small amplitude can significantly improve the forming quality of materials. Owing to the advantages of reduced forming force, improved surface quality, avoidance of forming defects, and strengthened surface structure, ultrasonic-assisted forming technology has been applied to increasingly advanced forming processes, such as incremental forming, spinning, and micro-forming. However, in the ultrasonic-assisted forming process, there are multiple ultrasonic mechanisms, such as the volume effect and surface effect. The explanation of the effect of ultrasonic vibration (UV) on plastic deformation remains controversial, hindering the development of related technologies. Recently, many researchers have proposed many new theories and technologies for ultrasonic-assisted forming. To summarize these developments, systematic discussions on mechanisms, theoretical models, and forming performances are provided in this review. On this basis, the limitations of the current study are discussed. In addition, an outlook for ultrasonic-assisted forming is proposed: efficient and stable UV systems, difficulty forming components with complex geometry, explanation of the in-depth mechanism, a systematic theoretical prediction model, and multi-field-coupling energy-assisted forming are considered to be hot spots in future studies. The present review enhances existing knowledge of ultrasonic-assisted forming, and facilitates a fast reference for related researchers.

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“…(3) A similar work was carried out by Li et al [9]. An exponential function was used to correct the dislocation storage coefficient, k 1 :…”

Section: Models Based On Physical Mechanismmentioning

confidence: 99%

Section: Comparison Of Different Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

Shao

Zhan

2021

Chin. J. Mech. Eng.

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“…Amini [24] analyzed the impacts of process parameters including the sheet material, ultrasonic power, feeding speed, and tool diameter on the force reduction and temperature increment. Li and Cheng [25] built a theoretical model describing the relationship between the stress and strain during the ultrasonic-assisted incremental sheet forming to facilitate an accurate prediction. However, the modified model only considering the softening effect is insufficient and provides limited improvement in the prediction accuracy.…”

Section: Introductionmentioning

confidence: 99%

Surface Mechanical Properties and Micro-Structure Evolution of 7075 Aluminum Alloy Sheet for 2-Dimension Ellipse Ultrasonic Vibration Incremental Forming: A Pretreatment for Laser Shock Peening

et al. 2022

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In this paper, a composite technique of ultrasonic incremental forming and laser shock peeing is proposed. The former process is mainly used for the manufacturing of complex-shaped sheet and strengthening coating that is prepared for subsequent laser treatment. The latter is applied for secondary surface reinforcement with ultra-high energy. This work focused on the novel ultrasonic incremental forming method and its effects on surface mechanical properties and micro-structure of a 7075 aluminum alloy. First, a kind of 2-dimension ellipse ultrasonic vibration incremental forming process and the unique double-mechanism method of sectionalized cooperative control of plastic deformation and mechanical performance were designed. Second, the single-point incremental forming, the longitudinal ultrasonic vibration incremental forming, and the 2 dimension ellipse ultrasonic vibration incremental forming were performed for the manufacture of conical components of 7075 aluminum alloy. Third, the Vickers micro-hardness testing results and images of the fracture morphology of the machined part for the novel technique confirm that softening mechanisms become dominant inside the metal sheet. Furthermore, a strengthening coating with excellent mechanical properties and a residual compressive stress field were created on its surface simultaneously. In a word, the research shows potential values of the proposed technique for the manufacture of aircraft panels of complex shape and excellent surface properties.

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Deformation Analysis in Ultrasonic-Assisted Multi-stage Incremental Sheet Forming

Cheng

et al. 2021

Forming the Future

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Constitutive modeling and deformation analysis for the ultrasonic-assisted incremental forming process

Cited by 24 publications

References 28 publications

A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

Surface Mechanical Properties and Micro-Structure Evolution of 7075 Aluminum Alloy Sheet for 2-Dimension Ellipse Ultrasonic Vibration Incremental Forming: A Pretreatment for Laser Shock Peening

Deformation Analysis in Ultrasonic-Assisted Multi-stage Incremental Sheet Forming

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