摘要
弯曲疲劳寿命是钢制车轮的一项重要性能指标,但制造过程中的过盈配合和轮辐板厚变化对车轮疲劳寿命的影响规律尚不清楚。本文通过测定轮辐板厚变化规律,并建立考虑过盈配合和轮辐板厚变化的钢制车轮弯曲疲劳有限元模型,比较了是否考虑这两种因素对车轮疲劳热点位置应力水平的影响,最后采用比例双轴疲劳方法预测车轮疲劳寿命。结果表明,过盈配合及轮辐板厚变化均会带来车轮弯曲疲劳寿命的下降,在有限元分析中不可忽略。
Fatigue life in cornering test is one important performance of steel wheel,but the influences of interference fit and disk thickness variation on fatigue life are still unknown.Based on the measurement of disk thickness variation and the finite element model considering interference fit and thickness variation,this paper researches the influence of these two factors on the stress distribution in the fatigue hot spots,and predicts the fatigue life of wheel by using proportional multiaxial fatigue approach.The results indicate that both interference fit and disk thickness variation lead to reduce the fatigue life in cornering test,and these factors shouldn＇t be ignored in finite element analysis.
出处
《机械设计与研究》
CSCD
北大核心
2011年第2期44-47,51,共5页
Machine Design And Research
关键词
弯曲疲劳寿命
钢制车轮
轮辐板厚变化
过盈配合
有限元
cornering fatigue life
steel wheel
disk thickness variation
interference fit
finite element
