Damage Analysis of Glass-to-metal Diffusion Welded Joints
The glass-to-metal seals are usually used in the solar thermal power (STP) and electronicdevices.However,the requirement of mechanical properties in the STP is much higher than that ofelectronic devices,because the glass-to-metal joints used in the STP need to have anti-fatigueperformance in adition to higher static tensile strength.Under the repeated fluctuating loads,damageand failures of glass-to-metal seals in the STP often lead to serious consequences.Therefore,analysisof damage evolution and fracture behavior of glass-to-metal diffusion welded joints was performed inthis paper.Firstly,the finite element (FE) model of glass-to-metal welded joints was established inaccordance with the STP welded structures.And damage simulation was carried out by the FEsoftware ABAQUS.Also,the work illustrates the modeling of damage in terms of traction versusseparation to simulate crack propagation and introduces the use of traction-separation law as adamage initiation and evolution criteria.The microgram of damage distribution in the glass side nearthe interface could be characterized by Scanning Electron Microscope (SEM),which was comparedwith predictions obtained by finite element method (FEM) analysis.As result,the damage criteria onthe lap joints in conjunction with FM analysis were used to optimize the glass-to-metal diffusionwelding technology.The above results provide the basis of design against damage and reliableestimation of glass-to-metal seals.
Glass-to-metal joint Diffusion welding Finite element analysis Damage Damage initiation and evolution
X.H.Shen X.Ling
School of Mechanical and Power Engineering,Nanjing University of Technology,210009 Nanjing,China
国际会议
成都
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）