复合材料直升机平尾结构概率损伤容限评估

doi:10.7527/S1000-6893.2021.25557

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复合材料直升机平尾结构概率损伤容限评估

万傲霜

中国民航大学航空工程学院, 天津 300300

收稿日期:2021-03-23 修回日期:2021-07-21 出版日期:2022-06-15 发布日期:2021-07-20
通讯作者: 万傲霜,E-mail:aswan@cauc.edu.cn E-mail:aswan@cauc.edu.cn
基金资助:
中央高校基本科研业务费专项资金（3122021042）

Probabilistic assessment on damage tolerance of composite helicopter horizontal tail structure

WAN Aoshuang

College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China

Received:2021-03-23 Revised:2021-07-21 Online:2022-06-15 Published:2021-07-20
Supported by:
Fundamental Research Funds for the Central Universities of Civil Aviation University of China (3122021042)

摘要/Abstract

摘要： 考虑工作应力和剩余强度的随机性，建立了航空复合材料结构概率损伤容限评估的应力-剩余强度干涉模型，以复合材料直升机平尾结构为研究对象，统计分析了工作应力、损伤尺寸、初始强度和疲劳极限等随机因素，基于考虑损伤尺寸效应的剩余强度模型，利用Monte-Carlo方法，评估了复合材料直升机平尾结构的失效概率。结果表明，建立的航空复合材料结构概率损伤容限评估方法是可行的，考虑了复合材料结构制造和服役过程中众多随机因素对剩余强度的影响，符合实际情况；损伤类型和损伤修复效率对复合材料直升机平尾结构的失效概率有显著影响，穿透型损伤对平尾结构可靠度的不利影响大于分层损伤，平尾结构的失效概率随着修复效率增大而降低。

关键词: 复合材料, 损伤容限, 平尾, 剩余强度

Abstract: Considering the randomness of working stress and residual strength, this article develops a stress-residual strength interference model for probabilistic assessment on damage tolerance of the aircraft composite structure. The stochastic factors including working stress, damage size, initial strength and fatigue limit of the composite helicopter horizontal tail structure are statistically analyzed. Based on the residual strength model considering the effect of damage size, the failure probability of composite helicopter horizontal tail structure is evaluated using the Monte-Carlo method. The results indicate that the proposed probabilistic damage tolerance assessment method for the aircraft composite structure is feasible. The effects of various stochastic factors during manufacture and service of the composite structure on residual strength are taken into consideration, which are consistent with the actual situation. It is found that the damage type and damage repair efficiency have significant influence on the failure probability of the structure. The through-thickness damage has more adverse effect on the reliability of the structure than the delamination damage. The failure probability of the structure decreases with the increase of repair efficiency.

Key words: composite materials, damage tolerance, horizontal tail, residual strength

中图分类号:

V215.2

万傲霜. 复合材料直升机平尾结构概率损伤容限评估[J]. 航空学报, 2022, 43(6): 525557-525557.

WAN Aoshuang. Probabilistic assessment on damage tolerance of composite helicopter horizontal tail structure[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(6): 525557-525557.

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复合材料直升机平尾结构概率损伤容限评估

Probabilistic assessment on damage tolerance of composite helicopter horizontal tail structure

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