The Experiment Study Of Residual Stress In Welded Steel Structure And FEM Analysis

In recent years, the steel structure system presented the broad prospect in construction industry in our country, the steel structure design and the construction technology also get the rapid development and great economic efficiency. As one of three kinds of the most main connection method in steel structure, The welding technology has (welding, bolting, riveted joint) more and more widespread application such as construction structure, bridge, submarine ships, pressure vessel and spaceship because of remarkable merit. However, it results in the residual stress in the steel structure welded joint become mostly factor that distort, stable and the brittle fracture cannot be neglected, which also has proven fully huge harm function of the welding residual stress regarding the steel structure brittle fracture accident analysis in the structure in recent years,. Therefore it is extremely essential to reasonable appraisal welded joint residual stress distribution in the weldment and influence to the component supporting capacity.Take welded joint residual stress examination project to the grinding machine with thick plate as a reference in article, take enhances the grinding machine to work under the load function safe guarantee as the goal. Through the thick plate welding model and the scene residual stress test many times on the spot, which discovers all kinds of welded joint the residual stress distributed rule and tests the annealing the residual stress value in the weldment. In this study, obtains its redistribution rule and trend diagram of curves to the residual stress after the annealing cold treatment in the welded joint. To provides the essential data reference for the steel structure design, the construction, the welding and the heat treatment. Carries on the hot - structure coupling analysis using the ANSYS APDL language simulation welding transient state process procedure, which analyzes the influence regarding the residual stress in the different welding material and method. The experimental results and numerical simulation the butt weld complex physical chemistry change process has provided the effective reference method for further studied the welding deformation ,the residual...