An unified approach to fatigue damage tolerance in advanced engineering materials and structures

先进工程材料和结构疲劳损伤容限的统一方法

• 批准号: 41752-2008
• 负责人: Glinka, Grzegorz
• 金额: $ 1.82万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=450838
• 关键词: unified; approach; fatigue; damage; tolerance

Fatigue failures are the cause of over 90% of all premature failures of mechanical and civil engineering objects such as airplanes, pipelines, bridges and ground vehicles. Therefore, the primary tasks in satisfying high level of safety and sufficiently long service life is an accurate estimation and prognosis of fatigue strength and durability of machines and structures subjected to irregular cyclic loads. Inadequate frequency of periodic inspections and incorrect assessment of the fatigue damage may result in unexpected catastrophic collapse. On the other hand, the cost of premature retirement of healthy mechanical components and too frequent inspections and service interruptions reaches on the national scale hundreds of million of dollars each year.

疲劳失效是机械和土木工程物体（如飞机、管道、桥梁和地面车辆）90%以上过早失效的原因。因此，满足高水平安全性和足够长的使用寿命的主要任务是准确估计和预测承受不规则循环载荷的机器和结构的疲劳强度和耐久性。定期检查频率不足和疲劳损伤评估不正确可能导致意外的灾难性倒塌。另一方面，健康的机械部件过早退役以及过于频繁的检查和服务中断的成本每年在全国范围内达到数亿美元。