Numerical analysis of contact pressure between rolls of Sendzimir mill based on double influence function method and conjugate gradient techniques

Zhao, Weimin; Qin, Xizhong; Haixia, Qu; Wu, Qiong; Chen, Wei; Liu, Fengbin; Wang, Hui; Li, Feng

doi:10.1016/j.advengsoft.2022.103388

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…One is that mature AFP products are not widely available, and the other is that the contact mechanics of AFP is more complex. In practical applications, accurate modeling of rolling contact has always been a significant issue, [28][29][30] diversity of contact materials, nonlinear properties of materials, complex boundary conditions, and geometric constraints all greatly increase the difficulty of analysis. 31,32 The above issues are more acute in the AFP process, where the physical properties of the composite material are more complicated, the contact surfaces are irregular, and the material properties of the rubber roller and prepreg are also affected by the laying temperature.…”

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confidence: 99%

Modeling of contact mechanics and defects investigation in automated fiber placement

Miao,

Zhu,

Guo

et al. 2024

Polymer Composites

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The layup quality of prepreg fibers onto complex surfaces is the most concerned issue in automated fiber placement (AFP), which is intimately related to the contact stress in tractive rolling contact. An analytical model of tractive rolling contact is proposed in this paper to clarify the defects mechanism during the AFP process, which considers the mold curvatures, mechanical properties of contacted objects, and pose information to make it suitable for irregular surfaces and arbitrary conditions. Classical Hertz theory in this model is expanded to 3D contact area, and multi‐scale deformations are united in the accurate calculation of contact stress under geometric constraints. Based on the model, the phenomena of adhesion, microslip, and the transition between them in AFP are systematically analyzed. For engineering applications, a discrete processing strategy is proposed to quickly obtain the local curvatures of the mold. Additionally, an algorithm is designed to calculate the contact stress of any path. Experimental results on an aircraft component demonstrate the accuracy of the proposed model in restoring the contact stress distribution during AFP. In conjunction with specific layup information, this model exhibits utility in forecasting laying defects and parameter optimization.Highlights An analytical modeling approach based on Hertz theory is proposed to calculate the contact stress in automated fiber placement. A model‐based algorithm is designed and combined with the proposed discrete scheme to quickly restore the contact stress distribution. Contact states related to stress are systematically investigated and defects analysis based on computational mechanics results is illustrated.

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mentioning

confidence: 99%

Modeling of contact mechanics and defects investigation in automated fiber placement

Miao,

Zhu,

Guo

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

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An optimization framework for hot-rolled strip crown control based on model-driven digital twin

Wang,

Liu,

et al. 2024

J. Iron Steel Res. Int.

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Study on roll shape control characteristics of electromagnetic control sleeve support roll

Chen,

Xu,

Bai

et al. 2024

Metall. Res. Technol.

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The paper proposed a new type of electromagnetic control support roll to obtain a better ability of controlling the plate shape. According to the principle of induction heating, the bulge shape of the support roll and the contact pressure between the rolls are changed to control the crown of the work roll. To analyze the shape control characteristics of the electromagnetic control sleeve support roll, the roll system model of the four-high mill was established and the no-load bulging experiment was carried out. The simulation results show that under different roll sleeve thickness, current frequency and current intensity, the bulge amount of support roll, contact pressure between rolls and work roll crown increase with heating time, but the growth rate gradually decreases to zero. The bulge of the support roll, the contact pressure between the rolls, the crown of the work roll change quasi-linearly with the current frequency and parabolically with the current intensity. The bulging amount of the support roll and contact pressure decrease with the increase of the thickness of the roll sleeve, and the crown of the work roll increases first and then decreases. This paper verifies the feasibility of adjusting the shape of roll gap by electromagnetic control sleeve support roll, which provides a basis for multi-zone joint control.

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Numerical analysis of contact pressure between rolls of Sendzimir mill based on double influence function method and conjugate gradient techniques

Cited by 7 publications

References 12 publications

Modeling of contact mechanics and defects investigation in automated fiber placement

Modeling of contact mechanics and defects investigation in automated fiber placement

An optimization framework for hot-rolled strip crown control based on model-driven digital twin

Study on roll shape control characteristics of electromagnetic control sleeve support roll

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