内套筒对预紧力齿连接接头预紧力的影响

The Influence of The Inner Sleeve on The Pre-tightening Force of The Pretightening Tooth Connection Joint

为了研究内套筒材料性能与几何尺寸等参数对预紧力影响规律,本文首先通过实验对不同内套筒材料与壁厚对预紧力的影响规律进行研究。然后通过有限元软件ANSYS建立了接头预紧力施加的数值模型,模拟结果与实验实测值吻合较好,并通过有限元对实验现象进行了分析。结果表明:相同挤压量下,接头壁厚越高,所产生预紧力越高;对于塑性材料的内套筒接头,当外部挤压量超过一定值时,塑性材料完全进入塑性,变形增加,但应力值不再显著增长,预紧力趋于稳定;而对于弹性材料的内套筒接头,弹性材料应力一直随着应变线性增长,因此预紧力随着挤压量增加不断增加。

In order to study the influence law of the inner sleeve material properties and geometric dimensions on the pre-tightening force,this paper firstly studied the influence law of different inner sleeve material and wall thickness on the pre-tightening force through experiments.Then,the numerical model of the joint pre-tightening force was established by the finite element software ANSYS,the simulation results were in good agreement with the experimental values,and the experimental phenomena were analyzed by the finite element.The results show that under the same extrusion amount,the higher the joint wall thickness,the higher pre-tightening force generated;for the inner sleeve joint of plastic material,when the external extrusion amount exceeds a certain value,the plastic material completely enters plasticity and deforms increase,but the stress value no longer increases significantly,and the pre-tightening force tends to be stable;for the inner sleeve joint of elastic material,the elastic material stress has been increasing linearly with the strain,so the pre-tightening force continues to increase with the increase of the extrusion amount.