Study on the mechanism of belt cord angle contribution to tire cornering power

Lihong Sun, Dang Lu
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Abstract

In this study, tests on the cornering and self-aligning stiffness of tires with various belt cord angles were conducted. Subsequently, a new cornering power model was developed to analyze the mechanism of the belt cord angle’s influence. It was observed that the cornering stiffness is influenced by the combined effect of the length of contact patch and the lateral stiffness of the belt, both of which are affected by the belt cord angle. Specifically, an increase in the belt cord angle leads to a longer contact patch, which results in an increase in the cornering stiffness. Additionally, an increase in the belt cord angle causes a decrease in the lateral stiffness of the belt. Consequently, the lateral flexibility of the carcass increases, leading to a decrease in cornering stiffness. Furthermore, the influence of the lateral flexibility of the carcass becomes more prominent with an increase in the load. As a result, under heavy loads, the cornering stiffness decreases with an increasing belt cord angle. It was also observed that the influence of the belt cord angle on self-aligning stiffness is mainly achieved through the impact on contact length, with self-aligning stiffness increasing as contact length increases. The torsional stiffness of the carcass, influenced by variations in the belt cord angle, does not significantly impact the self-aligning stiffness of the tire. These findings provide valuable insights into tire mechanics and offer guidance for the design and development of tires with enhanced cornering performance.
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带帘线角度对轮胎转弯力贡献的机理研究
本研究对不同带帘线角度轮胎的转弯刚度和自对准刚度进行了测试。随后,建立了一个新的转弯动力模型,以分析带帘线角度的影响机理。研究发现,转弯刚度受接触片长度和带侧刚度的共同影响,而这两个因素都受带帘线角度的影响。具体来说,皮带帘线角度增大会导致接触面积变长,从而增加转弯刚度。此外,传动带帘线角的增大会导致传动带横向刚度的减小。因此,胎体的横向柔韧性增加,导致转弯刚度降低。此外,随着载荷的增加,胎体横向柔韧性的影响会变得更加突出。因此,在重载情况下,转弯刚度会随着带绳角度的增大而降低。另外还观察到,带帘线角度对自对准刚度的影响主要是通过对接触长度的影响来实现的,自对准刚度随着接触长度的增加而增加。胎体的扭转刚度会受到带束帘线角度变化的影响,但对轮胎的自调心刚度影响不大。这些发现为轮胎力学提供了宝贵的见解,并为设计和开发具有更强转弯性能的轮胎提供了指导。
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