SCI论文写作数学公式描述 Can be given as Can be written as Can be expressed as Can be represented by Can be estimated from Can be simplified as Can be determined by Can be calculated from Can be xxputed by Can be obtained from Can be represented by Can be defined as Can be described as Can be shown as Can be obtained by Can be xxputed form A by Can be evaluated from A by Can be achieved as follows Substituting Eq.1 into 2 gives Can be estimated from the following expression: Can be approximated by the following expressions: Can be obtained by using the following equation: Close to A denotes the pipe radius. A represents the pipe diameter. Iterative solving Iterative solution Analyzed by iterative method A is used to iterate Assume be loaded in At a given time Service time/period exceed 10 years Herein, therefore, Constant amplitude Increase with increasing elapsed time/ with time elapsed Eq. 1 defines the number of cycles to failure Can not be solved analytically because of its xxplexity 本文来源：https://www.wddqw.com/doc/413fd17ebb1aa8114431b90d6c85ec3a86c28b0c.html