Abaqus焊接模拟例子.docVIP

Low Stress Welding Simulations Welding is a fundamental manufacturing technique used to join metal components. While a variety of welding processes exist, most involve the application of heat to induce coalescence of the metal in the adjoining parts. The gas welding technique uses the heat from a gas flame to melt together the contacting edges of the parts being joined. A filler material may or may not be used.The introduction of very high temperatures in the region of the welded joint causes steep temperature gradients in the structure. As a weld cools, residual stresses may be produced in the weld zone; such stresses may cause the structure to distort. The ability to predict the residual stress state allows for the prediction of final part shapes and a more complete understanding of how residual stresses can affect the load capacity of a structure. 低应力焊接模拟 焊接是一个基本的制造技术，用来连接金属部件。虽然各种焊接过程存在，大多数涉及应用热诱导聚合的金属连接部分。 气体焊接技术使用的热气体火焰熔化在一起的边缘接触部分被加入。填充材料可能会或可能不会被使用。 引进的温度很高，在该地区的焊接接头的原因，陡峭的温度梯度的结构。作为一个焊接冷却，残余应力的产生可能是在焊缝区；这种压力可能导致结构扭曲。预测能力的残余应力状态，可以预测最终零件的形状和一个较完整的理解如何残余应力会影响的承载结构 The finite element models described in this article represent structural beams. These structures are formed by welding plate sections together rather than producing the section directly in a mill. The cross-sectional size of these components can make direct manufacture impractical.The techniques discussed here are based on a generic model but are transferable to a range of applications. Finite Element Analysis Approach The simulation uses a sequentially coupled approach in which a thermal analysis is followed by a stress analysis. The temperature results from the thermal analysis are read into the stress analysis as loading to calculate the thermal stress effects. The thermal analysis makes use of ABAQUS user subroutines DFLUX, GAPCON, and FILM. The objective of the simulation is to predict post-weld deformation and residual stress distribution. 有限元模型，本文中所描述的结构梁。这些结构是由焊接板部分连接在一起，而不是生产的部分直接在轧机