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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Effect of strain rate on bending and transmission characteristics of injection molded polyamide 66 spur gears
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Effect of strain rate on bending and transmission characteristics of injection molded polyamide 66 spur gears

机译：应变率对注塑成型聚酰胺66正齿轮弯曲弯曲和传动特性的影响

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摘要

Polymer material exhibits time-dependent mechanical behavior due to its viscoelastic characteristics. Thus, unlike steel gears, polymer gears exhibit complex behavior when transmitting loads at various rotational speeds. In general, gear tooth surfaces exhibit complex stress due to their nonconformal geometry. Hence, the nonlinear material and nonlinear geometric aspects of polymer gear mesh prompted an investigation of the bending and transmission characteristics of injection molded polyamide 66 gears at various strain rate conditions. The injection molded tensile specimens made from the gear material were subjected to various rates of loading. The stress-strain performance at various rates of loading was evaluated and used to model linear and nonlinear gear materials for the numerical analysis. The numerical investigation was carried out on the steel-polyamide gear pair with the commercial finite element analysis tool ABAQUS (R) to predict the bending stress and static transmission error. The predicted static transmission error of the gear pair was compared with the experimental results obtained using an in-house developed gear test rig. The bending stress with the linear material models was higher than that of the nonlinear material models. An increase in bending stress with the strain rate was observed in the case of the nonlinear material models. The static transmission error predicted with the nonlinear material model at a higher strain rate was lower for both the single tooth contact and the double teeth contacts.
机译：由于其粘弹性特性，聚合物材料表现出时间依赖的机械行为。因此，与钢齿轮不同，聚合物齿轮在以各种旋转速度传递负载时表现出复杂的行为。通常，由于不规成形的几何形状，齿轮齿表面具有复杂的应力。因此，聚合物齿轮网的非线性材料和非线性几何方面促使在各种应变速率条件下对注射模塑聚酰胺66齿轮的弯曲和传输特性进行研究。对由齿轮材料制成的注塑的拉伸标本进行各种载荷速率。评估各种负载率下的应力 - 应变性能，并用于模拟用于数值分析的线性和非线性齿轮材料。用商业有限元分析工具ABAQUS（R）对钢 - 聚酰胺齿轮对进行数值研究，以预测弯曲应力和静态传输误差。将齿轮对的预测静态传输误差与使用内部开发的齿轮试验台获得的实验结果进行了比较。具有线性材料模型的弯曲应力高于非线性材料模型的弯曲应力。在非线性材料模型的情况下，观察到具有应变速率的弯曲应力的增加。对于单齿触头和双齿触点，用非线性材料模型预测的静态传输误差较低。

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