Modeling the influence of web thickness and length imperfections resulting from manufacturing processes on wound roll stresses

Mollamahmutoglu, C.; Good, J. K.

doi:10.1016/j.cirpj.2014.10.004

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…有限元法通过离散的有限单元集合体来代替真实的结构 [35] , 通过有限元模型的建立, 可以探究芯筒几何不均匀 [30] 、薄膜几何厚度分布 [36,37] 以及料卷内部的层间滑移 [38] 对收卷内应力的影响. 并且利用有 [39,40] .…”

Section: 利用有限元法建立收卷模型unclassified

“…对于柔性基板沿轴向厚度分布不均匀的情形,可分别采用"伪3D"模型 [27] 和基于最小能量原理的有限元方法 [34,37] 进行建模, 两者结果较为一致, 表明在厚度较大的位置, 其径向应力与周向应力相对更大. 对于弹性模量较小的材料可视为大变形性材料, 小变形理论不再适用, 需要针对大变形材料建立了大变形模型 [41,42] , 结果表明大变形模型下的结果更接近于实验结果.…”

Section: 膜物理参数对内应力的影响unclassified

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Review of wound roll stress in roll-to-roll manufacturing of flexible electronics

Chen¹,

Jin²,

Yin³

2019

Chin. Sci. Bull.

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Section: 利用有限元法建立收卷模型unclassified

Section: 膜物理参数对内应力的影响unclassified

Review of wound roll stress in roll-to-roll manufacturing of flexible electronics

Chen¹,

Jin²,

Yin³

2019

Chin. Sci. Bull.

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“…One of the most important parameters in the R2R process is the uniformity of the web obtained in the transverse direction. As such, the material of the web used to coat the electrolyte should be a thin, flexible, nonbreakable plastic film such as polyethylene terephthalate (PET) or polyimide (PI) [10][11][12]. Moreover, the web can be easily deformed by external forces due to the roll eccentricity and temperature fluctuations of the heater in the dryer during the movement of the web, which could deteriorate coating quality.…”

Section: Introductionmentioning

confidence: 99%

Web Unevenness Due to Thermal Deformation in the Roll-to-Roll Manufacturing Process

Lee

Kim

et al. 2020

Applied Sciences

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In roll-to-roll (R2R) processing, web uniformity is a crucial factor that can guarantee high coating quality. To understand web defects due to thermal deformation, we analyzed the effect of web unevenness on the coating quality of an yttria-stabilized zirconia (YSZ) layer, a brittle electrolyte of solid oxide fuel cells (SOFCs). We used finite-element analysis to study thermal and mechanical deformations at different drying temperature levels. A YSZ layer was also coated using R2R slot-die coating to observe the effect of web unevenness on coating quality. Web unevenness was generated by thermal deformation due to conduction and convection heat from the dryer. Because of varying web unevenness with time, the YSZ layer developed cracks. At higher drying temperatures, more coating defects with larger widths were generated. Results indicated that web unevenness at the coating section led to coating defects that could damage the SOFCs and decrease yield in the R2R process. Coating defects generated by web unevenness caused by convection and conduction heat should be considered in the high-volume production of brittle electrolytes using the R2R process.

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“…One of the most important parameters in the R2R process is the uniformity of the web obtained in the transverse direction. As such, the material of the web used to coat the electrolyte should be a thin, flexible and non-breakable plastic film like polyethylene terephthalate (PET) or polyimide (PI) [10][11][12]. Moreover, the web can be easily deformed by external forces due to the roll eccentricity and temperature fluctuations of the heater in the dryer during the movement of web, which could deteriorate the coating quality.…”

Section: Introductionmentioning

confidence: 99%

Web Unevenness due to Thermal Deformation in Roll–to–Roll Manufacturing Process

Jo¹,

Lee²,

Kim³

et al. 2020

Preprint

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In roll-to-roll (R2R) processing, uniformity of the web is a crucial factor that can guarantee high coating quality. To understand web defects due to thermal deformation, we analyzed the effects of web unevenness on the coating quality of an yttria-stabilized zirconia (YSZ) layer, a brittle electrolyte of solid oxide fuel cells (SOFCs). We used finite element analysis to analyze the thermal and mechanical deformations at different drying temperatures. A YSZ layer was also coated using R2R slot-die coating to observe effects of web unevenness on the coating quality. It was seen that web unevenness was generated by thermal deformation due the conduction and convection heat from the dryer. Owing to varying web unevenness with time, the YSZ layer developed cracks. At higher drying temperatures, more coating defects having larger widths were generated. Results indicated that web unevenness at the coating section led to coating defects, which could damage the SOFC and decrease its yield in the R2R process. From this study, we suggest that coating defects, generated by the web unevenness owing to the convection and conduction heat, should be considered for the high-volume production of brittle electrolytes using the R2R process.

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Modeling the influence of web thickness and length imperfections resulting from manufacturing processes on wound roll stresses

Cited by 10 publications

References 3 publications

Review of wound roll stress in roll-to-roll manufacturing of flexible electronics

Review of wound roll stress in roll-to-roll manufacturing of flexible electronics

Web Unevenness Due to Thermal Deformation in the Roll-to-Roll Manufacturing Process

Web Unevenness due to Thermal Deformation in Roll–to–Roll Manufacturing Process

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