Kavite Boşluk Basıncını Düzenleyerek Elastik Çubuğun Ayarlanabilir Sürtünme Kuvveti

Öz

Bu çalışmanın amacı, polimerik malzemeden yapılmış kavite içeren elastik bir çubuk ile sert, pürüzsüz, düz bir yüzey arasında ayarlanabilir bir sürtünme kuvvetinin araştırılması ve elde edilmesidir. Polimerlerden yapılan elastik silindirik çubuklar genellikle yüzey desenleme bileşeni olarak kullanılır. Bu çalışmada, düz ve rijit bir yüzeyle temas halinde olan düz uçlu elastik silindirik çubukların sürtünme kuvveti pnömatik tabanlı eyleyici sistemi ile ayarlanmıştır. Silindirik çubukların sürtünme kuvvetini çubukların iç kaviteye basınç uygulayarak ayarlamak için sonlu elemanlar tabanlı simülasyon gerçekleştirilmiştir. Elastik çubuklar ile karşıt rijit yüzey arasındaki sürtünme kuvveti, adeziv katkısı ihmal edilerek Amontons-Coulomb Sürtünme Kanunu kullanılarak modellenmiştir. Sürtünme kuvvet genliği, elastik çubukların farklı kavite boyutları ve farklı kavite basınç değerleri ile hesaplanmıştır. Bulgular; kaviteye sahip olmanın sürtünme kuvvetini azalttığını, kavite çapının sürtünme kuvvetinin azalması üzerinde kavite uzunluğundan daha fazla etkiye sahip olduğunu göstermektedir. Sonuç olarak, kavite içindeki basıncı düzenlemenin sürtünme kuvvetini ayarlamak için etkili bir yöntem olduğu gösterilmiştir.

Anahtar Kelimeler

• Sürtünme
• Ayarlanabilir Sürtünme
• Elastik Çubuk
• Basınçlı Kavite
• Eğilme Rijitliği

Adjustable Friction Force of Elastic Post via Regulating Internal Cavity Pressure

Öz

The objective of this study is to investigate and obtain an adjustable friction force between an elastic polymeric post with cavity and a rigid, smooth, flat surface. Elastic cylindrical posts made of polymers are generally used as surface texturing components. In this study, the friction force of the elastic cylindrical posts with a flat tip in contact with a smooth and rigid surface was adjusted by a pneumatic-based actuation system. Finite-element based simulation was performed to adjust the friction force of the cylindrical posts by pressurizing the inner cavity of the posts. The frictional contact between the elastic posts and the counter rigid surface was modeled using the Amontons-Coulomb friction law, neglecting the adhesive contribution. The friction force amplitude was calculated with different cavity dimensions of the elastic posts and different cavity pressure values. The results show that the presence of an internal cavity reduces the friction force, and the cavity diameter has more influence on the reduction of the friction force than the cavity height. In conclusion, regulating the cavity pressure was shown to be an effective method of adjusting the friction force.

Anahtar Kelimeler

• Friction
• Adjustable Friction
• Elastic Post
• Pressurized Cavity
• Bending Rigidity

Kaynakça

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