[Numerical finite element modeling of custom car seat using computer aided design]

Area of Science:

• Biomechanics
• Biomedical Engineering
• Computer-Aided Design

Background:

• Cushions improve comfort and reduce hip pressure, mitigating disease incidence.
• Accurate pressure distribution analysis is crucial for effective cushion design.

Purpose of the Study:

• To present a computer-aided design (CAD) modeling method for buttocks cushions.
• To utilize numerical finite element (FE) simulation for predicting pressure distribution.
• To optimize cushion design for enhanced user comfort and health outcomes.

Main Methods:

• Acquired buttock and cushion geometry using laser scanning.
• Developed a solid model using CAD software.
• Created a finite element (FE) model of a seated individual, including pelvis and soft tissue.
• Simulated pressure distribution using a vertical force of 520N on the pelvis.

Main Results:

• The study successfully modeled buttocks-cushion interaction using FE analysis.
• Predicted pressure distribution patterns on the buttocks-cushion interface.
• Provided a foundation for designing cushions that effectively manage pressure.

Conclusions:

• The developed CAD and FE simulation method enables accurate prediction of pressure distribution.
• This approach facilitates the design of advanced cushions for improved comfort and reduced disease risk.
• The methodology offers a valuable tool for biomechanical research and product development in seating solutions.