摘要
针对GH202鱼脊焊接结构,分别基于数值仿真和试验方法开展焊缝极限承载能力精细化分析及评估技术研究。基于材料力学性能及焊缝尺寸测量结果,建立精确的鱼脊焊接结构有限元模型,分别对各条焊缝力学性能进行分析,并基于双切线法开展焊缝承载能力评估。结果表明:数值仿真方法获得的焊缝极限承载能力为18.9t,数值仿真方法与试验测试结果保持了较好的一致性。拉伸载荷作用下,鱼脊焊缝断裂位置均发生在与载荷作用平面成20°左右的夹角方向,数值模拟的焊缝塑性流动方向与断裂方向基本保持一致,数值仿真分析能够较好地预示焊缝断裂方向。
Aming at GH202 fillet welded structure,detailed analysis and evaluation technology of ultimate bearing capability of fillet weld was carried out based on numerical simulation and experiment test.A finite element model was established based on material mechanical properties and size measurement of the fillet weld.The mechanical properties of each fillet weld was analyzed and the ultimate bearing capability was evaluated based on double tangent method.The results show that the ultimate bearing capability of the fillet weld is 18.9t by numerical simulation method.The result tested by numerical simulation method is in good agreement with that tested by experiment.Under tensile loading,the interface between the fracture surface and tensile load plane basically keeps 20°.Plastic flow direction obtained by numerical simulation is consistence with fracture basically,the numerical simulation analysis can predict fracture direction of the weld well.
作者
袁喆
任建亭
YUAN Zhe;PEN Jianting(School of Mechanics,Civil Engineering &Architecture,Northwestern Polytechnical University,Xi'an 710100,China)
出处
《热加工工艺》
CSCD
北大核心
2018年第21期199-202,共4页
Hot Working Technology
关键词
鱼脊焊缝
极限承载能力
精细化分析
塑性流动
fillet weld
ultimate bearing capability
refined analysis
plastic flow
作者简介
袁喆(1986-),女,陕西西安人,博士生,研究方向:材料成型工艺及其力学性能研究;电话:15991768667;E—mail:zheyuan67@163.com.
