首页>
外国专利>
Method and system for determining crack nucleation of a part subject to fretting fatigue
Method and system for determining crack nucleation of a part subject to fretting fatigue
展开▼
机译:确定微动疲劳零件的裂纹形核的方法和系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method for determining crack nucleation for a part subject to fretting fatigue. Fretting fatigue tests are performed on at least one test specimen having a material composition similar to the part. The results of the test are analyzed to determine a variation of stress intensity factor as a function of time which may be referred to as (Q{N}) for the test specimen. A relationship is then determined between (Q{N}) and crack nucleation (Ni) for the test specimen. A variation of stress intensity factor as a function of time (Q{N}) for the part is determined based on the operating conditions and loads of the part. The (Q{N}) for the part is then corresponded to the (Q{N}) for the test specimen to determine a crack nucleation value (Ni) for the part. In a preferred embodiment, a computer is programmed to conduct the analysis.
展开▼
机译:一种确定微动疲劳零件的裂纹形核的方法。微动疲劳试验在至少一个具有与零件相似的材料组成的试样上进行。分析测试结果以确定应力强度因数随时间的变化,其对于测试样品可称为(Q&NN)。然后确定(Q& N})与试样的裂纹成核度(N i Sub>)之间的关系。根据零件的工作条件和负载确定零件的应力强度因子随时间的变化(Q ^ N)。然后将零件的(QQN)与试样的(Q(N)相对应,以确定零件的裂纹成核值(N i Sub>)。在优选实施例中,计算机被编程为进行分析。
展开▼