Justification for a 2D versus 3D fingertip finite element model during static contact simulations

Area of Science:

• Biomechanics
• Biomedical Engineering
• Human Factors

Background:

• Investigating human hand biomechanics during product interaction is crucial.
• Excessive contact pressure can lead to discomfort, pain, and cumulative traumatic disorders.

Purpose of the Study:

• To compare the benefits and limitations of 2D and 3D finite element models (FEM) of human fingertips.
• To evaluate the suitability of simplified versus anatomically correct models for biomechanical analysis.

Main Methods:

• Development and comparison of a simplified 2D FEM and an anatomically correct 3D FEM of a human fingertip.
• Analysis of contact pressure and displacement under load.

Main Results:

• 2D FEM are adequate for analyzing peak contact pressure and displacement in a specific cross-section.
• 3D FEM provide a more comprehensive contact pressure distribution that reflects fingertip anatomy.
• 3D models offer additional insights into biomechanical behavior.

Conclusions:

• The choice of FEM (2D vs. 3D) depends on the specific biomechanical parameters of interest.
• Anatomically correct 3D fingertip models are superior for understanding detailed contact pressure distribution.
• 3D models enhance the understanding of fingertip biomechanics during interaction.