文献类型：期刊文献

中文题名：疲劳累积损伤对发动机缸盖再制造的影响

英文题名：Influence of Fatigue Damage Accumulation on Refabrication of Engine Cylinder Head

作者：华沂[1];吴益文[1];蒋海宁[1];胥成民[1];徐凌云[1];王胜辉[2];王辰[2];陈进[2];孙晓明[2]

机构：[1]上海出入境检验检疫局工业品原材料检测技术中心,上海200135;[2]华东理工大学机械与动力工程学院失效分析中心,上海200237

年份：2009

卷号：45

期号：8

起止页码：474

中文期刊名：理化检验（物理分册）

外文期刊名：Physical Testing and Chemical Analysis(Part A:Physical Testing)

基金：国家质检公益性行业科研专项资助项目(2007GYJ028)

语种：中文

中文关键词：发动机缸盖;疲劳损伤累积;损伤度;疲劳寿命

外文关键词：engine cylinder head; fatigue damage accumulation; damage degree; fatigue life

摘要：通过对新、旧发动机缸盖取样进行疲劳试验,对比了其S-N曲线,结果发现:应力幅较大时,新、旧缸盖材料的疲劳寿命相差明显;应力幅较小时,新、旧缸盖材料的疲劳寿命相差不大,表明旧发动机缸盖材料的损伤程度随着应力幅的增加而增大。因此当发动机经过再制造后,有可能因为累积损伤的原因存在安全隐患。
By means of fatigue test, the S-N curves of new and used engine cylinder heads were compared. It was found that the fatigue lives had an obvious contrast between new and used materials in the case of a large stress amplitude, while in a small stress amplitude, the difference between them was very little. It can be concluded that the damage degree of engine cylinder head after refabrication will become serious along with the increase of stress amplitude. In a word, as the result of damage accumulation, the engine may have a hidden trouble of safety after refabrication.