Reliability assessment under real world environmental stress

摘要

The traditional reliability assessment method only considers the product under the condition of constant environmental stress. However, the products are often actually exposed to the real world environmental stress. Aiming to solve this problem, the real world environmental stress of the typical geographical location is introduced, and the five-parameter polynomial fitting method is used to deal with its historical climate data and get the variation tendency of temperature and humidity. Based on the Nelson cumulative damage model and generalized Eyring model, the product reliability assessment method under real world environmental stress is studied. Compared with the traditional reliability assessment method under constant environmental stress, the reliability assessment method under real world environmental stress is more accurate.