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<p>Traditional non-pneumatic tires (NPTs) still face challenges in modeling theory and load capacity optimization. Drawing inspiration from the remarkable mechanical adaptability of feline limbs, this study proposes a bio-inspired spoke structure (C-NPT). We hypothesize that the C-NPT design can enhance both static and dynamic load-bearing performance, a premise validated through theoretical modeling and experimental testing. The research methodology integrates bionic principles with advanced engineering analysis. First, we propose a cat-leg-inspired spoke element and establish its dynamic model and finite element model. Subsequent parametric optimization and comparative stress–strain analysis reveal performance differences between C-NPT and conventional NPT designs. To precisely characterize deformation behavior, we develop a full-field non-contact strain measurement system to quantify the full-field strain distribution of C-NPT, revealing its characteristics and variation patterns. Theoretical modeling and experiments demonstrate that the static load capacity of C-NPT is increased by 11% on average, and the vertical displacement amplitude under dynamic conditions is reduced by 38%, verifying the hypothesis. This study provides a bionic solution for designing high-performance NPTs.</p>

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Modeling and experimental investigation of the mechanical properties of a novel bionic spoke-based non-pneumatic tire

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Xueliang Gao,
  • Sitan Wu,
  • Hongbo Zhang,
  • Lili Sun,
  • Qiji Huang

摘要

Traditional non-pneumatic tires (NPTs) still face challenges in modeling theory and load capacity optimization. Drawing inspiration from the remarkable mechanical adaptability of feline limbs, this study proposes a bio-inspired spoke structure (C-NPT). We hypothesize that the C-NPT design can enhance both static and dynamic load-bearing performance, a premise validated through theoretical modeling and experimental testing. The research methodology integrates bionic principles with advanced engineering analysis. First, we propose a cat-leg-inspired spoke element and establish its dynamic model and finite element model. Subsequent parametric optimization and comparative stress–strain analysis reveal performance differences between C-NPT and conventional NPT designs. To precisely characterize deformation behavior, we develop a full-field non-contact strain measurement system to quantify the full-field strain distribution of C-NPT, revealing its characteristics and variation patterns. Theoretical modeling and experiments demonstrate that the static load capacity of C-NPT is increased by 11% on average, and the vertical displacement amplitude under dynamic conditions is reduced by 38%, verifying the hypothesis. This study provides a bionic solution for designing high-performance NPTs.