铝锂合金自动化铆接过程应力应变特性研究与分析

Study and Analysis of Stress-strain Characteristics of Aluminum Lithium Alloy During Automatic Riveting Process

为研究铝锂合金铆接过程中的力学特性,为铆接工艺参数优化设计提供理论依据。针对铝锂合金的自动化铆接过程,建立有限元仿真分析模型,分析自动化钻铆过程中工艺参数对铆接干涉量、残余应力的影响,从而构建工艺参数与应力应变的关系模型。利用自动化钻铆设备MPAC,制作自动铆接试样并进行残余应力检测试验,并从铆接干涉量和残余应力两个方面验证了该模型的有效性。

In order to study the mechanical characteristics of aluminum lithium alloy during riveting process, the theoretical basis for the optimization design of riveting process parameters is provided. For the automatic riveting process of aluminum lithium alloy, a finite element analysis model, analysis of process parameters in the process of automatic drilling and riveting interference effect, residual stress of riveting, thus constructing the process parameters and the relationship between stress and strain of the model should be. The automatic riveting specimen was manufactured by automatic drilling and riveting equipment MPAC, and the residual stress test was carried out. The validity of the model was verified from two aspects of riveted interference quantity and residual stress.