摘要
为湿热环境条件下ZT7H/5429复合材料层合板的拉伸破坏应变基准值提供了一种精细化确定方法。通过在不同湿热环境下对含孔复合材料层合板进行拉伸试验,定量分析了温度和湿度对于层合板拉伸破坏应变的影响,并采用小子样整体推断技术建立了拉伸破坏应变预测模型。结果表明:拉伸破坏应变随温度升高而下降,并且下降幅度趋于平缓,而湿度所产生的影响并不显著。在拉伸破坏应变预测曲面的基础上,通过引入单侧容限系数进一步确定了拉伸破坏应变B基准值。相比传统单点法仅分析单一状态试验数据来获得B基准值,该方法充分考虑了不同状态下试验数据之间的关系模型,得到的B基准值具有2%~25%的提升,为复合材料结构的精细化设计提供了理论依据。
A refined method for determining the basis values of tensile failure strain for ZT7H/5429 composite laminates in hygrothermal environment was proposed.Through the tension tests of the composite laminates with open hole under different environmental conditions,the influence of temperature and humidity on the tensile failure strain was quantitatively analyzed,and a tensile failure strain prediction model was established based on small sample holistic inference technology.The results showed that the tensile failure strain decreased with the increase of temperature,and the decline became flat gradually,while the influence of humidity was not so significant.Based on the tensile failure strain prediction surface,the B-basis value of tensile failure strain was further determined by introducing one-sided tolerance-limit factor.Compared with the traditional single-point method of only analyzing the test results in the single state,the proposed method fully took into account the connection between the experimental data in different states and the B-basis values increased by 2%to 25%in most cases,providing a theoretical basis for the refined design of composite structures.
作者
常楠
辜良勇
张勇波
郭建超
CHANG Nan;GU Liangyong;ZHANG Yongbo;GUO Jianchao(Chengdu Aircraft Design&Research Institute,Aviation Industry Corporation of China,Limited,Chengdu 610091,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2023年第11期2659-2665,共7页
Journal of Aerospace Power
基金
国家自然科学基金(52005159)。
关键词
复合材料层合板
湿热环境
拉伸性能
B基准值
小子样
composite laminates
hygrothermal environment
tensile property
B-basis value
small sample
