Friction is an ever-present force in our lives, affecting the interaction between objects in numerous ways. The common hypothesis of frictionless contact between a foreign rigid object (needle) and a target material during puncturing leads to a constant penetration force. However, experimental observations reveal a linear increase in penetration force as the needle tip delves deeper. This force increment arises from the interplay of friction and adhesion at needle-solid interface. The present work provides an insight into the measure of friction and adhesion quasi-static characteristics at the needle-solid interface through puncture experiments. To this end, an axisymmetric hyperelastic model is presented to describe the expansion of a cavity under the contact pressure of the penetrating needle. In addition, the competing mechanisms of cavity expansion and mode I cracking during needle penetration in a soft solid are discussed.

Exploring the influence of friction in the puncture mechanics of soft solids / Montanari, M.; Spagnoli, A.. - In: MECCANICA. - ISSN 0025-6455. - (2024). [10.1007/s11012-024-01767-5]

Exploring the influence of friction in the puncture mechanics of soft solids

Montanari M.;Spagnoli A.
2024-01-01

Abstract

Friction is an ever-present force in our lives, affecting the interaction between objects in numerous ways. The common hypothesis of frictionless contact between a foreign rigid object (needle) and a target material during puncturing leads to a constant penetration force. However, experimental observations reveal a linear increase in penetration force as the needle tip delves deeper. This force increment arises from the interplay of friction and adhesion at needle-solid interface. The present work provides an insight into the measure of friction and adhesion quasi-static characteristics at the needle-solid interface through puncture experiments. To this end, an axisymmetric hyperelastic model is presented to describe the expansion of a cavity under the contact pressure of the penetrating needle. In addition, the competing mechanisms of cavity expansion and mode I cracking during needle penetration in a soft solid are discussed.
2024
Exploring the influence of friction in the puncture mechanics of soft solids / Montanari, M.; Spagnoli, A.. - In: MECCANICA. - ISSN 0025-6455. - (2024). [10.1007/s11012-024-01767-5]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2980654
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