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本文概述了耐久性设计这一先进技术的发展现状；针对现有的确定性裂纹增长方法（DCGA）的明显不足，提出了。发展的DCGA”[1]，其主要思想是：“在已经建立的通用EIPS分布的基础上，将结构的初始缺陷用原始疲劳质量模型描述，采用DCGA的程序及其计算结果，求出裂纹超越概率p（i，τ）与时间τ之间的关系，从而实现确定结构的损伤度和进行经济寿命预测的目的。”同时还编制了用发展的DCGA进行损伤度评估与经济寿命预测的程序，并通过一个应用算例证实了方法与程序的可行性。
This paper presents an overview of the current state of the art in the field of durability design. In view of the obvious deficiencies of the existing deterministic crack growth methods (DCGA), this paper proposes. Developed DCGA “[1], the main idea is:” Based on the established general EIPS distribution, the initial defects of the structure are described by the original fatigue quality model, and the procedure of DCGA and its calculation result are used to determine the crack propagation The relationship between the probability p (i, τ) and the time τ, so as to achieve the purpose of determining the damage degree of the structure and forecasting the economic life. At the same time, a program of developing damage assessment and economic life prediction with DCGA was also developed and the feasibility of the method and procedure was verified through an application example.