Pressure distribution in crowned roller contacts

Torstenfelt, Bo; Fredriksson, Billy

doi:10.1016/0264-682x(84)90007-8

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Therefore, geometric shape adjustments have been proposed to eliminate this phenomenon, namely, the crowned roller. In this case, the diameter of the roller to be machined is smaller at both ends and larger at the center [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Multi-Geometry Parameters Optimization of Large-Area Roll-to-Roll Nanoimprint Module Using Grey Relational Analysis and Artificial Neural Network

Nguyen

Gafurov

et al. 2023

Polymers

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Micro- and nanofabrication on polymer substrate is integral to the development of flexible electronic devices, including touch screens, transparent conductive electrodes, organic photovoltaics, batteries, and wearable devices. The demand for flexible and wearable devices has spurred interest in large-area, high-throughput production methods. Roll-to-roll (R2R) nanoimprint lithography (NIL) is a promising technique for producing nano-scale patterns rapidly and continuously. However, bending in a large-scale R2R system can result in non-uniform force distribution during the imprinting process, which reduces pattern quality. This study investigates the effects of R2R imprinting module geometry parameters on force distribution via simulation, using grey relational analysis to identify optimal parameter levels and ANOVA to determine the percentage of each parameter contribution. The study also investigates the length and force ratio on a backup roller used for bending compensation. The simulation results and the artificial neural network (ANN) model enable the prediction of nip pressure and force distribution non-uniformity along the roller, allowing the selection of the optimal roller geometry and force ratio for minimal non-uniformity on a specific R2R system. An experiment was conducted to validate the simulation results and ANN model.

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Section: Introductionmentioning

confidence: 99%

Multi-Geometry Parameters Optimization of Large-Area Roll-to-Roll Nanoimprint Module Using Grey Relational Analysis and Artificial Neural Network

Nguyen

Gafurov

et al. 2023

Polymers

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Cylindrical Roller Bearings with Optimized Profile Taking into Account the Material Structure and Operating Temperature

Popescu

2022

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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The present paper proposes a method for an almost uniform pressure distribution between the rolling elements, based on the modification of the roller’s initial straight profile and accounting for material parameters related to the operating temperature. The optimization process is analyzed by including the possible misalignment and/or tilting angles of the roller due to operating conditions. A computer program was developed in the Borland C++ programming language. The contact pressure distribution is evaluated by using a three-dimensional contact analysis model based on the Boussinesq force-displacement relations for a half-space combined with the flexibility approach. For a fast analysis, the algorithm uses a Conjugate Gradient Method in deriving the contact pressures and the real contact area.

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Pressure distribution in crowned roller contacts

Cited by 2 publications

References 7 publications

Multi-Geometry Parameters Optimization of Large-Area Roll-to-Roll Nanoimprint Module Using Grey Relational Analysis and Artificial Neural Network

Multi-Geometry Parameters Optimization of Large-Area Roll-to-Roll Nanoimprint Module Using Grey Relational Analysis and Artificial Neural Network

Cylindrical Roller Bearings with Optimized Profile Taking into Account the Material Structure and Operating Temperature

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