Huck铆钉铆接件拉伸性能的试验研究

EXPERIMENTAL STUDY ON TENSILE PROPERTIES OF HUCK RIVET JOINT

针对Huck铆钉在机车车辆应用中常出现脱落的现象,利用万能材料力学试验机对Huck铆钉铆接件进行准静态拉伸试验研究,得到了Huck铆钉铆接件拉伸性能曲线,并根据试验现象以及得到的拉伸性能曲线将铆接件的失效过程分为五个阶段,由此也获得了摩擦副失效载荷以及铆钉剪切性能和最大抗剪力,之后通过对在低应力低循环次数下进行疲劳实验的Huck铆钉铆接件进行准静态拉伸试验,发现在Huck铆钉剪切性能曲线后半段均出现载荷瞬时降低的趋势,但对剪切强度影响不大,并根据性能曲线将失效过程分成四个阶段,为铆钉铆接件的设计改进以及Huck铆钉疲劳试验起到一定的指导作用。

Aiming at the phenomenon that the Huck rivet often falls off in the application of rolling stock,the quasi-static tensile test of Huck rivet was carried out by using the universal mechanical testing machine. The tensile performance curve of Huck rivet is obtained. The failure process of the riveting part is divided into five stages according to the test phenomenon and the drawing performance curve. In addition,the failure load of the friction pairs and the shear behavior of the rivet and the maximum shear resistance are obtained. After that,the quasi-static tensile test was carried out on the Huck rivet of the fatigue test under low stress and low cycle times,we can found that in the second half of the Huck rivet shear performance curve,there is a trend of instantaneous load reduction,but it has little effect on the maximum shear strength. The failure process is divided into four stages according to the performance curve. In order to improve the design of rivet joint and the fatigue test of Huck rivet.