To address the poor heat dissipation and inadequate impact protection of traditional martial arts protective gear, this study proposes a protective gear design based on PCM, creating a synergistic system of thermal energy storage and impact cushioning. Paraffin-based PCM parameters (phase change temperature 33-35?C, latent heat 180 J/g) were determined through DSC testing. A coupled protective gear-human thermal model and a multimedia impact model were established. Simulations were performed using MATLand ANSYS/LS-DYNA, and experimental verification was conducted. The simulation results showed that with 30% PCM filling, a 6 mm PCM layer, and an 8 mm base layer, the thermal storage efficiency, temperature control time was 123 minutes, maximum impact force was 4.4 kN, and energy absorption were 87%, 123 minutes, 4.4 kN, and 84%, respectively. The corresponding experimental data showed a thermal storage efficiency of 85%, temperature control time of 120 min, maximum impact force of 4.2 kN, and energy absorption of 78%, with errors of ?5%. The optimal parameter protective gear achieved an overall score of 89, a 53.4% improvement over the pure EVA control group (58 points). This score meets athletes? needs for "high performance protection + high comfort" and provides a basis for the development of new protective gear (318 words).
Mao et al. (Thu,) studied this question.