关键词
浅析飞机线路中的焊接技术
作者: 施娟   方利   来源: 内燃机与配件 年份: 2021 文献类型 : 期刊 关键词: 虚焊   焊接   假焊  
描述: 端接技术。而目前的端接方式主要有焊接和压接两种。本文主要选取端接技术中一种方式——焊接技术进行深入研究,并制订可靠性的预防手段,在一定程度上降低了焊接风险。
航空发动机零部件焊接过程仿真
作者: 唐心武   来源: 北京航空航天大学 年份: 2016 文献类型 : 学位论文 关键词: 焊接   仿真  
描述: Welds are often an essential part of aero space engineering structures. Residual stresses introduced in the welded regions, due to the nonlinear thermal processes during welding, can have detrimental effects, such as stress corrosion cracking, hydrogen-induced cracking and reduced fatigue strength. It is therefore pertinent to simulate the process of welding to predict the behaviour of welded structures from finite element residual stress and deformation result. The base metal is Nickel based-supper alloy (INCONEL Alloy 718) of thin combustion chamber outer casing (CCOC). The simulations are performed with the commercial software SYSWELD+, which includes moving heat sources, material deposit, metallurgical properties, metal plasticity and elasticity, transient heat transfer and mechanical analyses. One-way thermo-mechanical coupling is assumed, which means that the thermal analysis is completed first, followed by a separate mechanical analysis based on the thermal history.This paper introduces finite element methods for the modeling of welds and it depicts a brief history of the simulation of welds. The processes, procedures, and metallurgy of gas-metal arc welding of nickel based alloy are presented in Chapter 2. In Chapter 3, the previous finite element analyses of welding are reviewed. The energy and constitutive equations governing a welding simulation are outlined in Chapter 4, while performing welding simulations utilizing the SYSWELD+ software is described in Chapter 5. The residual stress results for outer combustion casing are reported in Chapter6. The conclusion is described in chapter 7.Welding simulations to predict residual stress states require three-dimensional analysis in the vicinity of the joint and these analyses are computationally intensive and difficult. Although the state of the art in welding simulations using finite elements is improve as an advanced method.
航空发动机零部件焊接过程仿真
作者: 唐心武   来源: 北京航空航天大学 年份: 2016 文献类型 : 学位论文 关键词: 焊接   仿真  
描述: Welds are often an essential part of aero space engineering structures. Residual stresses introduced in the welded regions, due to the nonlinear thermal processes during welding, can have detrimental effects, such as stress corrosion cracking, hydrogen-induced cracking and reduced fatigue strength. It is therefore pertinent to simulate the process of welding to predict the behaviour of welded structures from finite element residual stress and deformation result. The base metal is Nickel based-supper alloy (INCONEL Alloy 718) of thin combustion chamber outer casing (CCOC). The simulations are performed with the commercial software SYSWELD+, which includes moving heat sources, material deposit, metallurgical properties, metal plasticity and elasticity, transient heat transfer and mechanical analyses. One-way thermo-mechanical coupling is assumed, which means that the thermal analysis is completed first, followed by a separate mechanical analysis based on the thermal history.This paper introduces finite element methods for the modeling of welds and it depicts a brief history of the simulation of welds. The processes, procedures, and metallurgy of gas-metal arc welding of nickel based alloy are presented in Chapter 2. In Chapter 3, the previous finite element analyses of welding are reviewed. The energy and constitutive equations governing a welding simulation are outlined in Chapter 4, while performing welding simulations utilizing the SYSWELD+ software is described in Chapter 5. The residual stress results for outer combustion casing are reported in Chapter6. The conclusion is described in chapter 7.Welding simulations to predict residual stress states require three-dimensional analysis in the vicinity of the joint and these analyses are computationally intensive and difficult. Although the state of the art in welding simulations using finite elements is improve as an advanced method.
航空电子产品焊接工艺验证方法研究
作者: 刘丙金   来源: 无线互联科技 年份: 2020 文献类型 : 期刊 关键词: 工艺验证   焊接   可靠性  
描述: 针对航空电子产品,阐述了一种相对完善的工艺验证方法,为航空电子产品制造商进行焊接工艺验证提供了指导。电子产品的类型多种多样,文章主要针对航空电子产品的特点,对其焊接工艺的验证方法进行探索和研究。
中国航空焊接/连接技术的发展与未来
作者: 王亚军   来源: 2004航空航天焊接国际论坛 年份: 2016 文献类型 : 会议论文 关键词: 航空   粘接   焊接   机械连接  
描述: 连接技术包括焊接技术、机械连接技术和粘接技术.本文分析航空焊接/连接技术的国内外发展现状,介绍了典型航空零部件焊接技术的应用实例,阐述了中国航空焊接/连接技术的发展思路.随着飞机、发动机对减重、提高
中国航空焊接/连接技术的发展与未来
作者: 王亚军   来源: 2004航空航天焊接国际论坛 年份: 2016 文献类型 : 会议论文 关键词: 航空   粘接   焊接   机械连接  
描述: 连接技术包括焊接技术、机械连接技术和粘接技术.本文分析航空焊接/连接技术的国内外发展现状,介绍了典型航空零部件焊接技术的应用实例,阐述了中国航空焊接/连接技术的发展思路.随着飞机、发动机对减重、提高
中国航空焊接/连接技术的发展与未来
作者: 王亚军   来源: 2004航空航天焊接国际论坛 年份: 2016 文献类型 : 会议论文 关键词: 航空   粘接   焊接   机械连接  
描述: 连接技术包括焊接技术、机械连接技术和粘接技术.本文分析航空焊接/连接技术的国内外发展现状,介绍了典型航空零部件焊接技术的应用实例,阐述了中国航空焊接/连接技术的发展思路.随着飞机、发动机对减重、提高
中国航空焊接/连接技术的发展与未来
作者: 王亚军   来源: 2004航空航天焊接国际论坛 年份: 2016 文献类型 : 会议论文 关键词: 航空   粘接   焊接   机械连接  
描述: 连接技术包括焊接技术、机械连接技术和粘接技术.本文分析航空焊接/连接技术的国内外发展现状,介绍了典型航空零部件焊接技术的应用实例,阐述了中国航空焊接/连接技术的发展思路.随着飞机、发动机对减重、提高
中国航空焊接/连接技术的发展与未来
作者: 王亚军   来源: 2004航空航天焊接国际论坛 年份: 2016 文献类型 : 会议论文 关键词: 航空   粘接   焊接   机械连接  
描述: 连接技术包括焊接技术、机械连接技术和粘接技术.本文分析航空焊接/连接技术的国内外发展现状,介绍了典型航空零部件焊接技术的应用实例,阐述了中国航空焊接/连接技术的发展思路.随着飞机、发动机对减重、提高
中国航空焊接/连接技术的发展与未来
作者: 王亚军   来源: 2004航空航天焊接国际论坛 年份: 2016 文献类型 : 会议论文 关键词: 航空   粘接   焊接   机械连接  
描述: 连接技术包括焊接技术、机械连接技术和粘接技术.本文分析航空焊接/连接技术的国内外发展现状,介绍了典型航空零部件焊接技术的应用实例,阐述了中国航空焊接/连接技术的发展思路.随着飞机、发动机对减重、提高
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