超声冲击态焊接接头疲劳性能分析
Fatigue assessment of welded joint improved by ultrasonic impact treatment
-
摘要: 使用ABAQUS软件对T形接头进行超声冲击处理，将处理结果导入隐式分析模块中得到了稳定的残余应力场.随后对冲击处理后的接头施加不同的拉伸载荷，计算不同网格尺寸条件下的ASME结构应力，验证了该方法的网格不敏感性；对比冲击态和未冲击态焊接接头的AMSE结构应力和ⅡW结构应力的应力集中系数，发现超声冲击处理可以有效降低焊趾处的应力集中系数，但ASME结构应力法对载荷变化更敏感.分别采用主S-N曲线和ⅡW结构应力S-N设计曲线，给出了基于ASME结构应力法和ⅡW结构应力法的疲劳寿命，结果表明，ASME结构应力法预测的疲劳寿命趋于相对保守.Abstract: The T-joint was subjected to ultrasonic impact treatment using ABAQUS software, and the results were imported into the implicit analysis module to obtain a stable residual stsress field. Then different tensile loads were applied to the joints after impact treatment to calculate the ASME structural stress under different mesh sizes, and the mesh insensitivity of the method was verified. Comparing the stress concentration factor of AMSE structural stress and ⅡW structural stress of welded joints with and without ultrasonic impact treatment, it is found that the stress concentration factor at weld toes could be effectively reduced by ultrasonic impact treatment, but the ASME structural stress method was more sensitive to load changes. Based on the master S-N curve and the ⅡW structural stress S-N design curve, the fatigue life of ASME structural stress method and ⅡW structural stress method were given. The results shown that the fatigue life predicted by ASME structural stress method tended to be relatively conservative.
-
Keywords:
- ultrasonic impac /
- structural stress /
- fatigue life /
- finite element
-
-
[1] 霍立兴.焊接结构的断裂行为及评定[M].北京:中国建筑工业出版社, 2000. [2] 田锡唐.焊接结构[M].北京:机械工业出版社, 1995. [3] 赵小辉,王东坡,王惜宝,等.承载超声冲击提高TC4钛合金焊接接头的疲劳性能[J].焊接学报, 2010, 31(11):57-60 Zhao Xiaohui, Wang Dongpo, Wang Xibao, et al. Improving fatigue property of TC4 titanium alloy welded joints by supersonic impact[J]. Transactions of the China Welding Institution, 2010, 31(11):57-60 [4] Caiyan D, Yong L, Baoming G, et al. Numerical implementation for fatigue assessment of butt joint improved by high frequency mechanical impact treatment:A structural hot spot stress approach[J]. International Journal of Fatigue, 2016, 92(1):211-219. [5] Wenbin G. Enhancement of the fatigue strength of underwater wet welds by grinding and ultrasonic impact treatment[J]. International Journal of Fatigue, 2015, 223:305-312. [6] 胡会会,王东坡,吴良晨,等.中低强度钢超声冲击处理焊接接头热点应力设计曲线[J].焊接学报, 2016, 37(5):124-128 Hu Huihui, Wang Dongpo, Wu Liangchen, et al. Hot spot stress design curve of ultrasonic impact welding joint for medium and low strength steel[J]. Transactions of the China Welding Institution, 2016, 37(5):124-128 [7] Wang T, Wang D, Huo L, et al. Subsevtion method of fatigue design for welded joints treated by ultrasonic peenig[J]. China Welding, 2006, 15(2):25-30. [8] 武奇,邱惠清,王伟生.基于结构应力的焊接接头疲劳分析[J].焊接学报, 2009, 30(3):101-105 Wu Qi, Qiu Huiqing, Wang Weisheng. Fatigue analysis of welded joints based on structural stress[J]. Transactions of the China Welding Institution, 2009, 30(3):101-105 [9] Dong P. A structural stress definition and numerical implementation for fatigue analysis of welded joints[J]. International Journal of Fatigue, 2001, 23(10):865-876. [10] Weich I. Edge layer condition and fatigue strength of welds improved by mechanical post-weld treatment[J]. Welding in the World Le Soudage Dans Le Monde, 2011, 55(1-2):3-12. [11] Weich I. Fatigue behaviour of welded high-strength steels after high frequency mechanical post-weld treatments[J]. Welding in the World, 2009, 53(11-12):322-332. -
期刊类型引用(3)
1. 吴斌，杨敬，焦敬品，何存富，齐高君. 奥氏体不锈钢小径管焊缝缺陷多模式超声复合全聚焦成像研究. 机械工程学报. 2020(14): 9-18 . 
百度学术
2. 沈成业，洪朝，黄海军，钱盛杰，王杜. 焊缝缺陷的全聚焦相控阵成像检测. 无损检测. 2020(09): 45-49 . 百度学术
3. 范学腾，伏喜斌，黄学斌，钟舜聪，方波，林起本，唐长明. 复合粘接结构脱粘缺陷全聚焦成像模拟及算法优化研究. 机电工程. 2019(08): 791-796 . 百度学术
其他类型引用(5)
计量
- 文章访问数: 446
- HTML全文浏览量: 13
- PDF下载量: 64
- 被引次数: 8
下载:
