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| 1 | Analytical Model of Elastic Modulus and Coefficient of Thermal Expansion for 2.5D C/SiC Composite显示文摘To make better use of 2.5D C/SiC composites in industry, it is necessary to understand the mechanical properties. A finite element model of 2.5D composites is established, by considering the fiber undulation and the porosity in 2.5D C/SiC composites. The fiber direction of warp is defined by cosine function to simulate the undulation of warp, and based on uniform strain assumption, analytical model of the elastic modulus and coefficient of thermal expansion (CTE) for 2.5D C/SiC composites were established by using dualscale model. The result is found to correlate reasonably well with the predicted results and experimental results. The parametric study also demonstrates the effects of the fiber volume fraction, distance of warp yarn, and porosity in micro-scale on the mechanical properties and the coefficients of thermal expansion. | 孔春元 孙志刚 NIU Xuming SONG Yingdong | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，3： | 1 |
| 2 | Analytical model of elastic modulus and coefficient of thermal expansion for 2.5D C/SiC composite显示文摘 | Chunyuan Kong Zhigang Sun Xuming Niu Yingdong Song | 2013 | Journal of Wuhan University of Technology-Mater Sci Ed2013，，3： | 1 |
| 3 | Mission segment division of the whole aeroengine loading spectrum based on flight actions显示文摘This paper studies on a division method of the whole aeroengine loading spectrum flight mission segment and rotor speed mission segment,which is based on the actual flight actions and related to the flight operations of aeroengine and is suitable for the variable-speed aeroengines such as turbojet and turbofan.Through the research,the aeroengine loading spectrum operation-related mission segments can be divided,which can provide important data basis for the life research on the structures which are sensitive to flight maneuver(such as the main shaft,large gearbox and installation section),lay a foundation for the simulation,compilation and prediction of the whole aeroengine loading spectrum.Firstly,based on the summary of basic flight actions in actual flight,the division of flight mission segment was realized by programming.Moreover,the aeroengine rotor speed mission segments,associated with flight actions and missions,were divided based on the flight mission segment division results.Besides,the efficiency and accuracy of the mission segment division results were verified by adopting measured loading spectrum data.Finally,the characteristics of speed mission segment division results were compared and analyzed in tables and figures.The comparison results show that the characteristics of similar speed mission segments are similar,while the characteristics of different speed mission segments are different.And the shapes of similar mission segments vary to the change of flight actions and operations,which can reflect the operation-related feature of the segments. | Yu JIN Zhigang SUN Yingdong SONG Xin LIN Xuming NIU Junjie DING | 2022 | Chinese Journal of Aeronautics2022，35，2： | 0 |
| 4 | A novel compilation method of comprehensive mission spectrum of aero-engine maneuvering load based on use-related mission segment显示文摘Comprehensive Mission Spectrum(CMS)of an aero-engine can reflect the usage characteristics of the engine.It can provide load input for engine life prediction and accelerated mission test.In this paper,a novel compilation method of CMS of aero-engine maneuvering load based on mission segment is proposed.Firstly,the use-related Typical Mission Segment(TMS)of maneuvering load is divided and identified according to spectral characteristics.Secondly,the mathematical model of different kinds of TMS are established based on stochastic process theory.Finally,the CMS of maneuvering load is compiled based on TMS.The proposed method can accurately quantify the compilation of CMS.The compiled CMS shows good agreement with the original load spectrum.According to damage consistency inspection,the compiled CMS is consistent with the damage caused by the original load spectrum in terms of low cycle fatigue. | Xuming NIU Qi LU Zhigang SUN Yingdong SONG | 2023 | Chinese Journal of Aeronautics2023，36，3： | 0 |
| 5 | The Application of Experimental Research Centers and Research Oriented Model to Specialty Materials Experimental Teaching显示文摘 | Xuming Zhang Dengyu Gai Zhongyi Niu Yunpeng Chang Minghui Ding Legan Hou | 2016 | International Journal of Technology Management2016，，7： | 0 |
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