焊接凝固裂纹数值模拟与预测系统后处理设计  

Post-data treatment design of software package for three dimensional simulation and prediction of weld solidification cracks

作　　者：董志波[1] 马瑞[1] 王勇 占小红[3] 魏艳红[1,3] 

机构地区：[1]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001 [2]上海新力动力设备研究所,上海200125 [3]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《焊接学报》2011年第3期17-20,113-114,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50775112)

摘　　要：设计了三维焊接凝固裂纹的数值模拟与预测软件系统,使普通的焊接技术人员可以简便地实现焊接凝固裂纹的数值模拟与预测.系统由三部分组成:前处理、后处理和凝固裂纹预测部分.文中利用工程应用软件的图形函数和矩阵运算函数库对系统后处理进行了设计,实现了对前处理模拟结果的数据处理,处理后的结果以平面曲线、云纹图和三维立体图的形式提供给用户;凝固裂纹预测部分将横向可调拘束试验得到的材料凝固塑性曲线处理,回归成材料的凝固裂纹阻力曲线,并与系统计算得到的凝固裂纹驱动力曲线进行对比,从而实现对焊接过程中凝固裂纹问题的预测.A software package has been developed which can simulate and predict the weld solidification cracks with three dimensional FEM.It consists of pre-processing,post-processing and solidification cracks predicting subsystem.The post-data treatment of software package for three-dimensional simulation and prediction of the weld solidification cracks can deal with the calculated results and display the results in featured curves,contours and 3D figures by combining graphic functions of softwares.The solidification cracks predicting subsystem regresses to the experimental data of trans-varestraint test(TVT) to obtain the material resistance curve of weld solidification cracks or reads the modified material resistance of simulating TVT from the database and has it compared with the one and thus predict the weld metal solidification cracks.

关 键 词：凝固裂纹预测 后处理 阻力曲线 驱动力曲线 

分 类 号：TG44[金属学及工艺—焊接]