梳状接头DFR值的疲劳试验分析方法  

Fatigue Experimental Analysis Method for DFR Values of Comb Joints

作　　者：吕毅[1] 

机构地区：[1]西安航空学院飞行器学院,陕西西安710077

出　　处：《飞机设计》2017年第1期31-34,共4页Aircraft Design

摘　　要：对2种典型梳状接头的疲劳试验进行了设计,试验结果表明,Ⅰ型试验件的破坏情况都为接头近螺栓孔边处断裂;而Ⅱ型试验件的断裂情况分为连接螺栓断裂和接头近螺栓孔边处断裂2种。为了满足梳状接头疲劳强度校核的需要,采用求解等代截面细节疲劳额定值(Detail Fatigue Rating,DFR)的方法得到了两种试验件接头的DFR值,并通过考虑螺栓的预紧力,得到了Ⅱ型试验件螺栓的DFR,从而为梳状对接结构的耐久性分析提供了试验支持。Fatigue tests of two typical comb joints have been designed, the results show that;the type I pieces of breakage occur on the joints at the edge near the bolt hole fracture, the type Ⅱ pieces of breakage are divided into two cases： bolt fracture and joints at the edge near the bolt hole fracture. In order to meet the requirement of the fatigue strength check of the comb joints, the equivalent section analysis method has been used to get the DFR values of the two test joints. And by considering the bolt preload, the bolt DFR values of the type Ⅱ test pieces is obtained. The fatigue experimental a- nalysis provides a test of durability support for comb joint.

关 键 词：梳状接头 疲劳试验 DFR 等代截面 螺栓预紧力 

分 类 号：V215.52[航空宇航科学与技术—航空宇航推进理论与工程]