Integral inference method for da／dN-ΔK andP-da／dN-ΔK curves

FU Hui-min; WU Qiong

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Integral inference method for da／dN-ΔK andP-da／dN-ΔK curves

大飞机动力 | 更新时间：2026-07-07

- Integral inference method for da／dN-ΔK andP-da／dN-ΔK curves
- Integral inference method for d／d-ΔK and-d／d-ΔK curves
- 航空动力学报 2011年26卷第6期页码：1251-1256
- 作者机构：
  
  Research Center of Small Sample Technology,Beijing University of Aeronautics and Astronautics,Beijing,China,100191
- 作者简介：
- 基金信息：
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- 纸质出版：2011
- 稿件说明：
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FU Hui-min, WU Qiong. Integral inference method for da／dN-ΔK and P-da／dN-ΔK curves[J]. 航空动力学报, 2011, 26(6): 1251-1256.

FU Hui-min, WU Qiong. Integral inference method for d／d-ΔK and-d／d-ΔK curves[J]. 2011, 26(6): 1251-1256.
FU Hui-min, WU Qiong. Integral inference method for da／dN-ΔK and P-da／dN-ΔK curves[J]. 航空动力学报, 2011, 26(6): 1251-1256. DOI：

FU Hui-min, WU Qiong. Integral inference method for d／d-ΔK and-d／d-ΔK curves[J]. 2011, 26(6): 1251-1256. DOI：

摘要

The integral inference method for fatigue crack growth (FCG) curve was established based on the two-variance regression theory. The estimates of da／dN-ΔK curve and P-da／dN-ΔK curve with high confidence level and high survival probability were also given. FCG data scatter with stress intensity factor ranges in reality

which limits the group test method's application. The presented method analyzes FCG curve as an integration

thus it can exploit the lengthwise information among the FCG rates corresponding to different stress intensity factor ranges. Therefore

compared with group test method

the presented method can not only save specimens

but also have higher precision in the evaluations of da／dN-ΔK and P-da／dN-ΔK curves.

Abstract

which limits the group test method's application. The presented method analyzes FCG curve as an integration

thus it can exploit the lengthwise information among the FCG rates corresponding to different stress intensity factor ranges. Therefore

compared with group test method

the presented method can not only save specimens

but also have higher precision in the evaluations of da／dN-ΔK and P-da／dN-ΔK curves.

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