RESEARCH ON SIMPLIFICATION OF LOADING SPECTRUM FOR FATIGUE CRACK GROWTH TEST

ZHANG Kan; DONG DengKe; CHEN Li

doi:10.16579/j.issn.1001.9669.2015.05.027

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RESEARCH ON SIMPLIFICATION OF LOADING SPECTRUM FOR FATIGUE CRACK GROWTH TEST

更新时间：2022-09-22

- RESEARCH ON SIMPLIFICATION OF LOADING SPECTRUM FOR FATIGUE CRACK GROWTH TEST
- Journal of Mechanical Strength Vol. 37, Issue 5, Pages: 845-848(2015)
- 作者机构：
  
  1. 中航工业飞机强度研究所
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2015.05.027
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ZHANG Kan, DONG DengKe, CHEN Li. RESEARCH ON SIMPLIFICATION OF LOADING SPECTRUM FOR FATIGUE CRACK GROWTH TEST. [J]. 37(5):845-848(2015)
DOI：

ZHANG Kan, DONG DengKe, CHEN Li. RESEARCH ON SIMPLIFICATION OF LOADING SPECTRUM FOR FATIGUE CRACK GROWTH TEST. [J]. 37(5):845-848(2015) DOI： 10.16579/j.issn.1001.9669.2015.05.027.

摘要

提出了一种新的分段加载方法,其可用于缩短飞机结构裂纹扩展试验周期。该方法基于低载截除技术,并结合含裂纹试验件的裂纹尖端应力强度因子情况,对裂纹扩展试验用随机载荷谱进行分析研究。随后,规划了典型壁板试验件进行试验验证,结果表明,在保证有效性的条件下,使用该方法能有效缩短试验时间(验证试验为27%),且验证试验件为全尺寸结构件,故该方法可以直接应用于机身壁板及其他飞机结构的裂纹扩展试验中。

Abstract

A new subsection-loading method has been used for solving question that was taken for aircraft structure cracking growth testing（ CGT） in a long time.Based on technology of low load cut-off,the random loading spectrum used in CGT,associated with the stress intensity factor in crack tip of specimens,was investigated.Furthermore,Testing verification of panel specimen has been completed.The testing result showed that pre-simplification agrees with subsection of the random loading spectrum,and application of the method can reduce the time of CGT reliably（ time reducing by 27% in the testing）.Finally,it can be concluded that the method can directly be applied for CGT of fuselage panel and other aircraft structures.

关键词

低载截除技术分段加载法应力强度因子典型壁板

Keywords

Technology of low cut-offSubsection-loading methodStress intensity factorTypical panel

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