机件服役载荷的断口反推  

RESTORING SERVICE LOADS OF A COMPONENT FROM ITS FRACTURE SURFACE

作　　者：武淮生[1] 钟群鹏[1] 应郁平[1] 

机构地区：[1]北京航空航天大学,材料科学与工程系,江苏理工大学

出　　处：《北京航空航天大学学报》1996年第2期121-125,共5页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：在ＬＹ１２ＣＺ铝合金板材的恒幅和变幅加载疲劳试验基础上，结合图象处理和计算机技术，导出了一种新的由断口反推机件服役载荷的反推法，并将反推结果与实验数据作了比较．同时对影响反推精度的有关参数进行了重要度分析．利用该反推法可以获得包含载荷顺序效应在内的机件有效载荷谱．One of the most important phases in mechanical design and failure analysis is to obtainservice loads accurately. Based on fatigue tests of LY12CZ aluminum alloy sheets for bothconstant loading and programmed loading. a new method has been proposed for restoring service loads of a component from its fracture surface. With this method, the effects of loadingsequence can be taken into account of . The restored loads are compared with the actual ones.Parameters affecting results are evaluated according to their sensitivity values. In certain conditions, the restoring procedure can also be accomplished automatically by using image processing and computer techniques.

关 键 词：载荷谱 疲劳断裂 断口检查 失效分析 

分 类 号：TB301[一般工业技术—材料科学与工程]