摘要
剩余强度模型在描述试件的动态疲劳行为方面是一种比较切合实际的方法。但对于曲轴这一类结构较复杂的构件,进行常规的剩余强度试验往往比较困难,为此提出了一种基于简化模型的动态信息跟踪方法的剩余强度试验研究方法。该模型建立在对谐振式弯曲疲劳试验台的振动分析和试件疲劳裂纹扩展的断裂力学分析之上。为探讨这种模型的可行性,根据韧性材料曲轴疲劳裂纹发展的特点,建立了简化量化关系并给出了量化分析的实例。
Residual strength model is a proper methodology to describe the dynamic fatigue behavior of mechanical component. But it is always difficult to get the residual strength model of some components with complicated structure, such as engine crankshaft. In order to achieve the investigation, an experimental residual strength model based on simplified model and dynamic information tracing technology was brought forward. The model is based on modality analysis of the resonant test machine for crankshaft and fracture mechanics analysis of crack expanding behavior. To estimate the feasibility of the method, a simplified quantified study model was also built up according to some experiential knowledge of crankshaft＇s fracture expanding characters. A sample investigation using the method was presented at last.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2006年第4期712-715,共4页
Acta Armamentarii
关键词
动力机械工程
内燃机
可靠性
剩余强度
疲劳试验
曲轴
power mechanical engineering
engine
reliability
residual strength
fatigue test
crankshaft
