Experimental and Computer Simulation Studies on Badminton Racquet Strings

Area of Science:

• Sports Engineering
• Materials Science
• Biomechanics

Background:

• Badminton racquet performance is influenced by string material, tension, and impact dynamics.
• Understanding these factors is crucial for optimizing player performance and equipment design.

Purpose of the Study:

• To experimentally, numerically, and analytically investigate the performance of different badminton racquet string materials.
• To determine the impact of string material, tension, and diameter on racquet vibration and impact response.

Main Methods:

• Vibration and impact tests were conducted on carbon graphite racquets with Kevlar, synthetic gut, natural gut, and polyester strings at various tensions.
• Analytical calculations and finite element analysis (FEA) using ANSYS® were performed on modeled racquets and shuttlecocks.
• String elasticity was measured, and its relationship with string diameter was analyzed.

Main Results:

• String elasticity decreased with increasing diameter, ranging from 0.529 to 0.447 for diameters 0.62–0.70 mm.
• FEA and analytical results showed good agreement (within 5% accuracy).
• Kevlar strings resulted in significantly higher racquet natural frequencies (23.0%–36.2% higher) compared to synthetic gut, natural gut, and polyester.

Conclusions:

• Kevlar is identified as a preferred material for badminton racquet strings due to its superior natural frequency characteristics.
• String tension variations, particularly for off-centered strings, had minimal impact on stress distribution.
• The study provides valuable insights for optimizing badminton equipment for enhanced player performance.