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Effects of Environment and Open Hole on the Mechanical Performance for Composite Laminate Plates

International Journal of Plant Engineering and Management 2017年第2期22卷 73-83页

作者： LU Zhi-xian LIU Bin TUO Hong-liang School of Aeronautics Northwestern Polytechnical University

As composites are increasingly used in aircraft,composites-based the primary-load bearing structures were gradually considered for wide application. However,to determine worst case of the primary-load bearing structures of composites is quite necessary. In this paper,to reveal the effects on the mechanical performance of composite laminate plates were made,respectively by open holes and different environments. Firstly,we obtained the benchmark of composite plates by conducting tension and compression of room temperature and dry air( RTD),tension of cold temperature and dry air( CTD),and compression of elevated temperature and wet( ETW). Then opened circle holes were introduced into composite plates to know the influence of holes. Finally,CTD and ETW environment were respectively investigated to composite plate with holes being under tension and compression loads. As shown by experimental results,open-holes decreased tension and compression mechanical performance 42% and 46% respectively,and ETW environment have 17% and 23% decreasing influence on the compression mechanical performance of composite plate and plate with holes. Furthermore,the compression damage mechanism of composite plates and plates with holes are fiber compressing-shearing fracture after fiber buckling.

关键词： primary-load bearing openholes composite CTD ETW fiber buckling

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Effects of environment and open hole on the mechanical performance for composite laminate plates

Effects of environment and open hole on the mechanical perfo...

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第十九届全国复合材料学术会议

作者： Zhixian Lu Bin Liu Hongliang Tuo School of Aeronautics Northwestern Polytechnical University

As composites are being used in aircraft increasingly, composites-based the primary-load bearing structures were gradually considered for wide application. However, determining worst case of the primary-load bearing structures of composites is quite necessary. In this paper, efforts were made to reveal the effects on mechanical performance of composite laminate plates, respectively by open holes and different environments. Firstly, we obtained the benchmark of composite plates by means of conducting tension and compression test of room temperature and dry air(RTD), tension of cold temperature and dry air(CTD), and compression of elevated temperature and wet(ETW). Then opened circle holes were introduced into composite plates to know the influence of holes. Finally, CTD and ETW environment were respectively investigated to composite plate with holes being under tension and compression loads. As shown by experimental results, open holes decreased tension and compression mechanical performance 42% and 46% respectively, and ETW environment have 17% and 23% decreasing influence on compression mechanical performance of composite plate and plate with holes. Furthermore, the compression damage mechanism of composite plates and plates with holes are fiber compressing-shearing fracture after fiber buckling.

关键词： primary-load bearing open holes composite CTD ETW fiber buckling

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