CAE在提高轿车钢圈强度的方法研究中的应用

为了满足轿车高速、大功率和刹车平稳可靠的需要,轮胎扁平化成为轿车工业设计和发展的趋势.该文重点研究轮胎扁平化后钢圈轮辋的强度问题,建立了钢圈轮辋的有限元计算模型,计算了现用材料不同厚度钢圈轮辋的强度和钢圈轮辋上不同位置处的最大承载力以及采用新材料时钢圈轮辋的最大承载力,并进行了冷轧工艺对强度影响的试验,得出了一些对提高钢圈强度有意义的结论.

轮胎钢圈开裂失效分析

某公司生产的轮胎钢圈在安装服役15d左右后出现批量开裂现象,采用宏观分析、化学成分分析、力学性能测试、金相检验及断口分析等方法对轮胎钢圈的开裂原因进行了分析。结果表明:该批轮胎钢圈失效为早期疲劳开裂;轮胎钢圈轮辋侧焊缝熔合线处存在机加工刀痕,产生缺口应力集中,加之裂源处焊缝熔深不足降低了其疲劳性能,加速了疲劳裂纹的萌生和扩展,最终导致轮胎钢圈早期疲劳开裂。

A mechanical system to predict wet grip potential of pavements

A precise friction model is essential for the prediction of tyre wet grip performance and optimization of pavement surface texture design.A mechanical system for predicting the wet grip potential of asphalt pavement was systematically presented using an extended rubber material model by a time step integration scheme.This analytical approach was transferred to a 2D numerical multi-body system consisting of interconnected masses,coupling spring and elementary rubber element of a generalized Maxwell model of rubber tyre tread.The system consists of two basic modules with the same program structure and algorithm,considering the frequency-,temperature-,and strain-dependency behaviors of the complex dynamic modulus of rubber element.The dependence of penetration depth and friction coefficient on the velocity was simulated and validated.It can be concluded that this system can be used for predicting the wet grip potential of asphalt pavements.

影响SS4型机车车轮轮箍镶装过盈量的因素及相应解决措施

对影响SS4型机车车轮轮箍镶装过盈量的各种因素进行了详细的介绍。根据分体轮对轮箍镶装相关文件,与日常工作中遇到的种种问题以及多年来积攒的经验结合起来,提出了解决问题的相应措施。

利用“WA”花纹的车胎印痕推定轮胎规格

对于“WA”花纹的车胎印痕,根据其花纹的结构可以进一步推定轮胎的规格,这对于确定犯罪嫌疑车辆有着非常重要的意义.本文从胎面“WA”花纹的排布规律入手,结合外界条件的变化对花纹的影响,阐述了这种推定的可行性.