孔的挤胀销棒应力压印工艺

本文主要分析孔的挤胀销棒应力压印工艺特点 ,挤压孔的受力机理分析 ,并通过疲劳试验观察不同条件下的寿命。

应力压印技术在西飞干线机项目上的应用

结合干线机试制，扼要介绍应力压印技术的强化机制，国内外技术现状和攻关过程出现的新老技术关键，并通过ＰＳＲ３－１４工艺评审鉴定和干线机４００１架机试制，介绍了西飞公司首次应用麦道应力压印技术的实践与体会。

挤胀销棒应力压印法及其疲劳性能分析

本文介绍了孔的挤胀销棒应力压印工艺，进行了压印之后孔周围的残余应力和压印前后孔的疲劳寿命计算，并通过计算结果说明了挤胀销棒应力压印对结构疲劳寿命的影响。

MD90飞机尾段装配的新工艺方法研究

主要分析了在MD90飞机尾段装配过程中的新工艺———销棒压印工艺和要求,以及在有无衬套挤压情况下的使用寿命,论述了通过冷加工方法,在不改变结构件尺寸和不增加重量的前提下,在高应力区对孔壁进行挤胀销棒应力压印,使孔周围材料产生塑性变形,改变应力,并在反复拉伸载荷作用下降低孔边应力峰值,从而提高结构件疲劳寿命。

Influence of Residual Stress on the Elastic-plastic Response to Indentation

The indentation method is useful in determining the residual stress according to the elastic-plastic properties of materials.So the effect of the residual stress on the elastic-plastic indentation properties of materials was studied by using the finite element method to find better indentation parameters which are strongly induced by the residual stress.The results show that load-depth curve,plastic pile-up,indentation shape,indentation contact stress and indentation residual stress are affected by different residual stress,and these parameters can be used to deduce the residual stress.Also,a special indentation equipment was developed to analyze the elastic-plastic properties of materials with different residual stress,and the experimental results show a good agreement with the FEM results.For practical application,the elastic-plastic indentation properties of materials with unknown residual stress could be obtained by the developed equipment to deduce the residual stress comprehensively.