A representative volume element model for the adhesion between a micro-pillared surface and a compliant substrate
A representative volume element model for the adhesion between a micro-pillared surface and a compliant substrate
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DOI：
10.1016/j.mechmat.2018.01.004
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发表时间：
2018-04-01
影响因子：
3.9
通讯作者：
Rentschler, Mark E.
中科院分区：
文献类型：
--
作者：
Kern, Madalyn D.;Long, Rong;Rentschler, Mark E.
建立了具有代表性的体积元（RVE）模型，以了解具有微柱阵列的有效刚性衬底与柔性衬底之间的粘附响应如何受到柱间距和长径比的影响。采取了许多验证和确认步骤来确保RVE模型是健壮的。我们发现，当柱间距足够小时，拉脱力减小，使得一个柱周围柔顺基底内部的局部变形受到相邻柱的影响。此外，当柱间距大、柱宽高比小时，当柔性衬底与柱之间的背表面接触时，拉脱力会急剧增加。我们的RVE模型可以为理解微图案表面与软基材之间的粘接接触力学提供有用的见解和定量数据。
A representative volume element (RVE) model was developed to understand how the adhesion response between an effectively rigid substrate with micro-pillar arrays and a compliant substrate is affected by the spacing and aspect ratio of pillars. A number of verification and validation steps were taken to ensure the RVE model was robust. We found that the pull-off force decreases when pillar spacing is small enough such that the local deformation within the compliant substrate around one pillar is affected by neighboring pillars. Additionally, pull off force can increase dramatically if the compliant substrate makes contact with the back surface between pillars, which occurs when the pillar spacing is large and pillar aspect ratio is small. Our RVE model can provide useful insights and quantitative data for understanding the adhesive contact mechanics between micro-patterned surfaces and soft substrates.