激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
7期
89-92
,共4页
激光焊接%热应力耦合%数值计算%微细裂纹
激光銲接%熱應力耦閤%數值計算%微細裂紋
격광한접%열응력우합%수치계산%미세렬문
Laser welding%Couple of thermal and stress%Numerical computation%Microcrack
以车用镀锌钢和6016铝合金为研究对象，利用Ansys Workbench14.5仿真平台对焊接过程进行热固耦合数值求解，进而得到给定工艺参数条件下的温度场和应力场分布。热电偶同步测温实验可以保证温度场计算的准确性，通过热应力耦合分析可以得到应力场。应力场分布表明，应力主要集中在焊缝区域，实验结果恰好证实了这一点。观察焊缝区域的微观组织发现，该区域出现许多细小的裂纹，说明了热应力集中是出现微细裂纹的主要原因。文章根据温度场和应力场的分布对工艺参数进行分析，以为实际的工程应用提供参考。
以車用鍍鋅鋼和6016鋁閤金為研究對象，利用Ansys Workbench14.5倣真平檯對銲接過程進行熱固耦閤數值求解，進而得到給定工藝參數條件下的溫度場和應力場分佈。熱電偶同步測溫實驗可以保證溫度場計算的準確性，通過熱應力耦閤分析可以得到應力場。應力場分佈錶明，應力主要集中在銲縫區域，實驗結果恰好證實瞭這一點。觀察銲縫區域的微觀組織髮現，該區域齣現許多細小的裂紋，說明瞭熱應力集中是齣現微細裂紋的主要原因。文章根據溫度場和應力場的分佈對工藝參數進行分析，以為實際的工程應用提供參攷。
이차용도자강화6016려합금위연구대상，이용Ansys Workbench14.5방진평태대한접과정진행열고우합수치구해，진이득도급정공예삼수조건하적온도장화응력장분포。열전우동보측온실험가이보증온도장계산적준학성，통과열응력우합분석가이득도응력장。응력장분포표명，응력주요집중재한봉구역，실험결과흡호증실료저일점。관찰한봉구역적미관조직발현，해구역출현허다세소적렬문，설명료열응력집중시출현미세렬문적주요원인。문장근거온도장화응력장적분포대공예삼수진행분석，이위실제적공정응용제공삼고。
This galvanized steel and the 6016 aluminum alloy were selected to be experimental research object. The problems of thermal stress coupled in given technology parameters of laser welding were studied through numer-ical simulation by using the 14.5 version of Ansys Workbench, so the distribution of temperature and stress field could be obtained. The synchronous test experiments of temperature by thermocouple ensure the accuracy of the tem-perature field calculation, so that the stress field could be calculated from temperature field by the couple of thermal and stress. The stress field distribution showed that the stress mainly concentrated in the region of the weld joint, which was demonstrated by the results of experiment. It was found that many tiny cracks located in the region of weld joint by observing the microstructure of weld area, which demonstrated that the thermal stress concentration was the main cause of microcrack. The technology parameters of laser welding were analyzed to provide a reference for practical engineering applications.
