金属材料超声疲劳试验数据的一致性分析  

The Consistency Analysis of Ultrasonic Fatigue Test Results of Metallic Materials

作　　者：彭文杰 吴圣川[3] 王金龙 PENG Wen-jie;WU Sheng-chuan;WANG Jin-long(School of Artificial Intelligence,Wuchang University of Technology,HubeiWuhan 430223,China;Baosteel Central Research Institute,Hubei Wuhan 430080,China;State Key Lab.of Traction Power,Southwest Jiaotong University,Sichuan Chengdu 610031,China;Marine Engineering College,Dalian Maritime University,Liaoning Dalian 116026,China)

机构地区：[1]武昌理工学院人工智能学院,湖北武汉430223 [2]宝钢股份中央研究院,湖北武汉430080 [3]西南交通大学牵引动力国家重点实验室,四川成都610031 [4]大连海事大学,辽宁大连116026

出　　处：《机械设计与制造》2024年第8期71-75,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金大科学装置联合基金培育项目(U2032121)。

摘　　要：超声疲劳试验技术已被广泛用于金属材料的超高周疲劳性能测试。超声频率条件下开展试样的超高周循环加载时,需要采用间歇加载控制试样发热,这会影响到试验结果一致性。同时,当循环周次由高周跨越至超高周后,疲劳试验结果对试样形状、尺寸、表面质量和内部缺陷更为敏感。基于大量的试验结果对这些影响因素进行了一致性分析。结果表明,加载间歇比和试样形状、尺寸对试验结果均有影响;试样表面质量与内部缺陷存在竞争效应;通过疲劳S-N曲线可以有效预测内部缺陷对超高周疲劳的影响。Ultrasonic fatigue test technology is widely used for very high cycle fatigue(VHCF)testing of metallic materials.As ultrasonic loading intensifies the heat generation and temperature rising of specimens,intermittent loading is adopted to strengthen the heat dissipation which will affect the consistency of test results.Meanwhile,when the fatigue cycle extends from high cycle to very high cycle,the testing results will be more sensitive to specimen shape,size,surface roughness and internal defect size.In this paper,consistency analyses of these factors are conducted directly through many ultrasonic fatigue tests.It is concluded that intermittent loading manner and specimen shape or size all have an impact on VHCF testing results.There is a competitive relationship between surface quality and internal defects.The effect of interior defect on VHCF can be effectively reflected through S-N curve.

关 键 词：超高周疲劳 间歇加载 尺寸效应 表面粗糙度 内部缺陷尺寸 

分 类 号：TH16[机械工程—机械制造及自动化] TH14[一般工业技术—材料科学与工程] TV313[水利工程—水工结构工程]