Finited Element Analysis of Welded Structures

Abstract

The object of this work was to predict the thermo-history of a welded joint using finite element analysis and provide design engineers with a reliable method of optimizing weld joint strength. A computer model was constructed, and results indicate the cooling of metal adjacent to the weld pool is the critical metallurgical location. Variables affecting this cooling time include metallurgical constitutents, radius of the heat flux, velocity of the arc, thermal conductivity of molten steel. The model includes thermal conductivity and specific heat as functions of temperature, latent heat of fusion, radiation, convection and a gauss distributed heat flux.

An overview of Direct Laser Deposition for additive manufacturing; Part I: Transport phenomena, modeling and diagnostics

“…Mazumder and Steen provided a detailed analysis of the heat transfer occurring during laser welding, especially with regard to the keyhole region and effects [167]. problem [170,174]. In these early demonstrations of FE for welding, the highly-coupled conservation equations were solved and the results were shown to match analytical and experimental results with minimal error.…”

A 2D finite element with through the thickness parabolic temperature distribution for heat transfer simulations including welding

“…The question is now how much must be subtracted from the FE stencil to exactly reproduce Eq. (19). This is given by…”

Temperature Distribution Analysis of Welding Parts in Ultrasonic Welding by Using FEM

“…하지만 실제 용접구조의 기하학적 형상이 복잡하고, 용접공정은 재료의 특성이나 온도 의존 및 소성변형 등을 포함한 비선형 문제 이므로 이론적으로 정확한 해를 얻는 것은 거의 불가능하다 [7,8] . [10] .…”