Analytical modeling for suction cup designs for skin-interfaced wearable devices.

Area of Science:

• Biomedical Engineering
• Materials Science
• Mechanical Engineering

Background:

• Stable mounting is crucial for skin-interfaced wearable biomedical devices.
• Existing mounting methods face challenges with prolonged wear, sweat, and skin irritation.
• Suction-based mounting offers adhesive-free attachment but lacks mechanical understanding.

Purpose of the Study:

• To establish analytical models for suction cup deformation and force.
• To provide direct relations between suction performance and design parameters.
• To offer a quantitative foundation for designing improved wearable device mounting.

Main Methods:

• Developed explicit analytical models for cone and ring suction cups.
• Formulated direct relationships between geometry, material properties, and loading conditions.
• Validated models against numerical solutions and derived scaling laws.

Main Results:

• The analytical models accurately predict suction cup performance.
• Identified key geometry and material parameters governing suction.
• Derived compact scaling laws for suction performance.
• Established direct relations between design parameters and suction performance.

Conclusions:

• The developed models provide a physically transparent foundation for suction-based mounting.
• This work enables the rational design of wearable biomedical devices with enhanced mounting capabilities.
• Offers a pathway to optimize device attachment for clinical utility and user comfort.