谱载荷下疲劳裂纹扩展的各种模型的评述

本文对谱载荷下预测疲劳裂纹扩展的各种模型作了综合介绍及评述。 对十余年来国内外学者提出的有代表性的载荷相互作用模型的基本原理、特征参数、主要的计算公式及优缺点等列表作了此较,并对模型的选择原则、计算精度与经济性进行了讨论。

A COMPREHENSIVE REVIEW OF THE MODELS FOR PREDICTING FATIGUE CRACK GROWTH UNDER SPECTRUM LOADING

This paper gives a comprehensive introduction and review of the models for predicting fatigue crack growth under spectrum loadings.The schematic, characteristic parameters, governing equations and strong and weak. points of the load interaction models, which are presented typically hy the specialists of various countries in over ten years, are summarized and compared in tabular form. In addition, the selective principle, predictive accuracy and computation. cost of the models are discussed..In the view of engineering applications, Willenborg/Chang model provides an effective method for predicting fatigue crack growth under complex spectrum loadings. and some models developed by Chinese specialists are rather simple and efficacious.It is worth noting that further research in this field should be performed experimentally and analytically.