M30高强螺栓假拧疲劳性能的试验研究  

Experimental Research on the Fatigue Properties of the M30 High-strength under False Twisting

作　　者：邱斌[1] 林健[2] 杨旭[1] 雷宏刚[1] 

机构地区：[1]太原理工大学建筑与土木工程学院 [2]中国人民解放军66011部队

出　　处：《科学技术与工程》2017年第7期20-25,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51578357)资助

摘　　要：通过对7个M30高强螺栓假拧常幅疲劳性能的试验研究,得到了M30高强螺栓在假拧状况下的疲劳破坏形式;分析了螺栓杆的断口形态,并建立了相应的S-N疲劳曲线以及表达式。最后,与已有的M30高强螺栓全拧的常幅疲劳试验结果对比,得出M30高强螺栓在只拧入3个螺纹的情况下,疲劳强度较全拧高强螺栓的疲劳强度降低了75%。Experimental study on constant amplitude fatigue performance of seven M30 high strength bolts with false twist is conducted.The fatigue failure modes of M30 high strength bolt under the condition of false twisting are obtained,the fracture morphology of the bolt rod is analyzed.And the corresponding S-N fatigue curves and expressions are established.Finally,compared with the fatigue test results of the existing M30 high strength bolts under the condition of full twisting,it is concluded that the fatigue strength of M30 high strength bolts controlled by3 screw threads reduces by 75%.

关 键 词：高强螺栓 假拧 疲劳性能 S-N曲线 

分 类 号：TB302.3[一般工业技术—材料科学与工程]