复杂载荷、极端环境下焊接结构疲劳寿命预测研究综述  

Review for Research of Fatigue Life Prediction of Welded Structures under Complex Loads and Extreme Environments

作　　者：董志波[1] 王程程 李承昆 李峻臣 赵耀邦[2] 历吴恺 徐爱杰[2] DONG Zhibo;WANG Chengcheng;LI Chengkun;LI Junchen;ZHAO Yaobang;LI Wukai;XU Aijie(National Key Laboratory of Precision Welding&Joining of Materials and Structures,Harbin Institute of Technology,Harbin,150001;Shanghai Spaceflight Precision Machinery Institute,Shanghai,201600)

机构地区：[1]哈尔滨工业大学材料结构精密焊接与连接全国重点实验室,哈尔滨150001 [2]上海航天精密机械研究所,上海201600

出　　处：《中国机械工程》2024年第5期829-839,共11页China Mechanical Engineering

基　　金：中国航天科技集团公司第八研究院产学研合作基金(SPMI 2022-09);航空发动机及燃气轮机重大专项基础研究(J2019-Ⅶ-0012-0154)。

摘　　要：焊接接头易出现缺陷和应力集中,在疲劳载荷作用下将成为疲劳裂纹萌生和扩展的薄弱区域。与均质材料相比,接头各区域微观组织及应力局部化使得焊接结构疲劳问题进一步复杂化。区别于理想实验条件,实际焊接结构服役环境复杂,疲劳寿命预测须考虑环境因素与焊接结构耦合特性。为此,对影响焊接结构的内在因素进行总结分析,从复杂载荷和极端服役环境两方面对现有焊接结构寿命预测模型进行综述,结合最新研究进展对改进焊接结构疲劳寿命评估方法提出建议。The welded joints were susceptible to defects and stress concentration,rendering them vulnerable areas for fatigue crack initiation and propagation under fatigue loads.In comparison to homogeneous materials,the microstructure and stress localization in each of regions for the joints further complicated the fatigue issue in welded structures.Unlike ideal experimental conditions,the actual service environments of welded structures were intricate,it was necessity to consider the coupling characteristics between environmental factors and welded structures when predicting welded structure fatigue life.Therefore,the internal factors influencing welded structures were summarized and analyzed while reviewing existing life prediction models from perspectives encompassing complex loads and extreme service environment.Combining the latest research progresses,the recommendations were proposed to enhance fatigue life assessment methods for the welded structures.

关 键 词：焊接结构 影响因素 复杂载荷 极端环境 寿命预测模型 

分 类 号：TG404[金属学及工艺—焊接]