基于等腰梯形截面的多层单道有限元几何建模及合理性分析  

Geometric modeling and rational analysis of multilayer single channel finite element based on isosceles trapezoidal section

作　　者：刘博文[1] 周祥曼[1] 秦敬平 周伟[1] 袁有录[1] 李立军[1] Liu Bowen;Zhou Xiangman;Qin Jingping;Zhou Wei;Yuan Youlu;Li Lijun(Three Gorges University,Yichang 443002,Hubei,China)

机构地区：[1]三峡大学,湖北宜昌443002

出　　处：《焊接》2024年第3期40-46,共7页Welding & Joining

基　　金：国家自然科学基金资助项目(51705287);湖北省教育厅科研计划(D20211203)。

摘　　要：提出了一种基于等腰梯形截面的WAAM多层单道有限元热力耦合仿真建模方法。首先,基于单层单道的等腰梯形函数模型,建立多层单道梯形函数模型。然后,通过对比多层单道的梯形函数模型和抛物线函数模型的几何偏差和散热性能指标,验证了多层单道梯形函数模型的合理性,并对多层单道沉积过程进行热力耦合仿真分析和对应的试验验证。仿真与试验结果表明,多层单道梯形函数模型的模拟结果与抛物线函数模型及试验结果均吻合较好,计算效率也得到一定的提高。Multilayer single channel finite element coupled thermal-mechanical modeling method based on isosceles trapezoidal cross section was proposed.Firstly,a multi-layer single-channel trapezoidal function model was built on a single-layer single-channel isosceles trapezoidal function model.Then,rationality of multi-layer single-channel trapezoidal function model was verified by comparing geometric deviation and thermal performance indexes of multi-layer single-channel trapezoidal function model and parabolic function model,and thermal coupling simulation analysis and corresponding experimental verification of multi-layer single-channel deposition process were carried out.The simulation and test results showed that simulation results of multilayer single-channel trapezoidal function model were in good agreement with parabolic function model and test results,and computational efficiency was improved to a certain extent.

关 键 词：电弧增材制造 有限元建模 梯形模型 残余应力 

分 类 号：TG444[金属学及工艺—焊接]