Dry adhesive structures designed to reduce the effective stiffness

摘要：

In the fabrication of dry adhesive structure,increasing contact-points or contact-area is the primary goal since the adhesive force grows in proportion to the contact-area.The simplest way to extend the contact surface is to utilize a column-array structure made of soft materials.However,the column-array structure could suffer from matting phenomenon where columns are stuck together.Therefore,we need a novel design to reduce the effective stiffness with adequate stiff materials like a gecko’s setae.In this study,we propose a novel design for the dry adhesive structure.The contact behavior between the proposed adhesive structure and a randomly rough surface is analyzed based on finite element method which includes the nonbonding interaction as a body force term.In order to demonstrate the usefulness of the proposed design,the dry adhesive structures made of SU8 are fabricated using optical lithography technique and the resulting adhesive forces are measured using a displacement-controlled indentation technique.

关键词： dry adhesive structure effective stiffness finite element method van der waals force

作者: Y.-S. Cho D.-H. Jung H. Han J.-H. Kim W.-D. Kim H.O. Kang

作者单位: Korea Institute of Machinery and Materials (KIMM),Republic of Korea Young-Sam Cho (phone:[phone]- Korea Institute of Machinery and Materials (KIMM),Republic of Korea National NanoFab Center (NNFC),Republic of Korea

会议类型: 国际会议

会议名称: The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)

会议地点: 重庆·南京

会议语种:英文

在线出版日期: 2007-05-01（万方平台首次上网日期，不代表论文的发表时间）