An example of applying new disciplines in engineering mechanics -Determining the deformation of casing on uncertain load in fuzzy condition

摘要

There are many difficulties to determine the stress, strain and deformation of ccasing with the common method, This paper systematically analyzes these difficulties according to the cause and characteristic of casing dampage, and presents that the deformation degree of casing can be determined by fuzzy synthesis evaluation (FSE). This method considers and utilizes many fuzzy factors that bring about casing damage, and provides a new way to carry on mechanics calculation under uncertain environment and load.