CAJ | 학술논문

利用热弹塑性有限元方法对5A06铝合金焊接接头的温度场和残余应力场进行模拟.有限元模型中选用三维实体单元,考虑材料物理性能随温度的变化和周边对流、辐射散热的影响.在模型中运用移动的三维双椭球体热源作为输入热源来模拟焊接过程,最终获得了焊接温度场和残余应力场.将有限元计算结果与残余应力的实测结果进行了对比,模拟结果与实测值有较好的一致性.
이용열탄소성유한원방법대5A06려합금한접접두적온도장화잔여응력장진행모의.유한원모형중선용삼유실체단원,고필재료물이성능수온도적변화화주변대류、복사산열적영향.재모형중운용이동적삼유쌍타구체열원작위수입열원래모의한접과정,최종획득료한접온도장화잔여응력장.장유한원계산결과여잔여응력적실측결과진행료대비,모의결과여실측치유교호적일치성.
Temperature and stress field of 5A06 aluminum welded ioint was simulated by using thermal-elastoplastic finite element method.The 3-D solid elements were used in FEM model,and the effect of temperature, and the heat convection and radiation of boundary on material properties were considered.The temperature field and residual stress field were obtained by using 3-D double-ellipsoidal heat source model to simulate welded process.The results of prediction and actual measured were compared and the results coincided with each other.