Ni（_18）CO－9Mo_5Ti马氏体时效钢的金相组织与性能

论述了Ｎｉ１８ＣＯ９Ｍｏ５Ｔｉ马氏体时效钢时效热处理时的相变规律及金相组织与机械性能的关系，提出了最佳的热处理工艺参数。     

Analysis Approach to Durability Based on Material Initial Fatigue Quality and S-N Curve

Based on probabilistic fracture mechanics approach, a new concept of material initial fatigue quality (MIFQ) is developed. Then, the relation between S-N curve and crack propagation curve is studied. From the study, a new durability analysis method is presented. In this method, S-N curve is used to determine crack growth rate under constant amplitude loading and evaluate the effects of different factors on durability and then the structural durability is analyzed. The tests and analyses indicate that this method has lower dependence on testing, and higher accuracy, reliability and generality and is convenient for application.     

Damping of Ni-Mn-Ga epoxy resin composites

By combining the advantages of effcient damping and high mechanical properties,Ni-Mn-Ga particle composites have a very good prospect for applications in damping structure design.In this paper,a ferromagnetic shape memory alloy Ni-Mn-Ga composite is prepared.Ni-Mn-Ga particle/bisphenol-A epoxy composite cantilever beam vibration tests under a magnetic feld and without the magnetic feld are conducted to analyze the structural damping ratios n.Meanwhile,the damping characteristics of the Ni-Mn-Ga composite are studied through the axial loading-unloading method and the acoustic emission signals method.The damping coeffcient of the composite for different Ni-Mn-Ga volume fractions is obtained.The interface properties of the composite are discussed by micro examination and axial loading.The relationships between the damping of the composite and that of the component materials are discussed.The specifc damping capacity（SDC）and acoustic emission counts diagram of different specimens with different Ni-Mn-Ga volume fractions are analyzed.     

星用材料静电放电信号分析

地球同步轨道卫星的在轨故障分析表明,ESD(静电放电)是导致卫星故障的重要原因之一,它约占故障总数的30%左右。文章叙述了ESD 信号的定量分析方法并报导了若干星用材料的充电和放电特性,其中包括Ag-SiO_2微晶玻璃、S-853白漆、SB-3消光黑漆、阳极化铝等材料。     

不同因素对高锁螺母锁紧力矩影响的研究

在直升机的实际装配过程中,一种高锁螺母会与多种高锁螺栓进行装配,而高锁螺母的锁紧力矩与稳定性不能保证.首先,从螺纹副精度、润滑条件、收口尺寸、材料、表面处理等方面对高锁螺母的锁紧力矩变化规律进行了定性分析.然后,通过试验的方法研究了不同材料、润滑条件及表面处理情况下,高锁螺母锁紧力矩的变化.试验结果表明:同规格下,硬度越大的材料,锁紧力矩愈大,稳定性愈差;在同样条件下,有润滑的高锁螺母配合,其锁紧力矩愈小,稳定性有明显加强;不同表面处理对高锁螺母的锁紧力矩的大小有一定影响,但稳定性变化很小.     

航空工业仿真数据管理解决方案

本文分析了航空航天行业企业对于仿真数据管理（SDM）平台建设的普遍需求和挑战,总结了与之对应的SDM平台方案建设的要素与益处。提出了采用多学科CAEBOM来进行仿真业务数据的结构化管理这一概念,强调了SDM如何与设计流程协同、平台如何同外部工具联合构建自动化流程两个平台建设的关键要素。最后,通过用户案例说明了国外宇航工业在这方面的最佳实践。     

功能梯度材料夹芯板的后屈曲

基于Reddy高阶剪切理论及Von-Karman大挠度理论,针对以功能梯度材料为面材的夹芯板的后屈曲行为进行了研究,数值算例给出了完善、非完善功能梯度材料夹芯板的后屈曲荷载-挠度曲线以及后屈曲荷载-端部缩短曲线。讨论了初始几何缺陷、材料组分指数、温度相关性、面内边界约束条件等各参数变化所带来的影响。     

星用非金属材料出气污染性质原位测试设备研制

成功研制了星用非金属材料出气污染性质原位测试设备，设备可原位、连续、定量测试星用非金属材料出气可凝挥发物率，给出全过程的出气数据、设备测控稳定、测试仪器灵敏，测试数据可靠；整体设计和技术教研室达到国际先进水平，并有所创新、是中国目前唯一的多功位星用非金属材料出气污染高灵敏度原位测试设备。     

民用飞机规范EBOM的生成方法及工具的研究

飞机行业的工程物料清单(EBOM)是飞机工程设计部门提供给制造、采购等部门作为生产控制及采购的依据,因此EBOM应具备信息全面、格式规范、简单易读等特点.以某民用飞机项目中实际应用的较为规范的EBOM格式为蓝本,以Excel电子表格为应用平台,定制EBOM所需包含的属性信息,利用Excel提供的功能定制一套生成规范的EBOM的方法及工作流程,通过Excel开发平台及VBA语言、函数的运用将EBOM的排版过程进行程序化,实现了规范EBOM的自动生成.