A damage constitutive model for needled CMCs composites and stress analysis of components
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摘要: 基于连续介质损伤力学方法提出了适用于针刺陶瓷基复合材料的各向异性损伤本构模型.该模型考虑了拉伸与剪切损伤的影响.通过试验得到了材料的拉伸和剪切的应力-应变曲线,采用曲线拟合获得了本构模型的参数.应用用户子程序技术将本构模型写入商用有限元软件,计算所得拉伸和剪切的应力-应变曲线与试验曲线比较吻合,最大误差分别为5.62%和1.47%.使用该损伤本构模型及弹性模型计算了航空发动机尾喷管调节片在气动和温度载荷下的力学响应,两者计算所得应力分布相似,但损伤本构模型计算值明显小于弹性模型计算值.Abstract: An anisotropic damage constitutive model for needled ceramic matrix composites was proposed based on continuum damage mechanics. The effects of both tensile damage and shear damage were considered in the model. The stress-strain curves of the material were obtained by tensile and shear tests and the parameters of the constitutive model obtained by curving-fitting. Then the model was written into commercial finite element software by user subroutine. Both calculated tensile and shear curves agreed with the test curves, and the maximum errors were 5.62% and 1.47% respectively. With both damage constitutive model and elastic model, an adjustment sheet of an aero-engine exhaust nozzle was calculated to analyze the mechanical response under complex aerodynamic load and temperature load. The stress distributions calculated by the two models were similar, but the value of damage constitutive model was obviously lower than that of the elastic model.
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[1] 郭友军,聂景江,徐永东,等.三维针刺C/SiC复合材料的结构特征和力学性能[J].硅酸盐学报,2008,36(2):144-149. GUO Youjun,NIE Jingjiang,XU Yongdong,et al.Microstructure and mechanical properties of three-dimensional needled C/SiC composite[J].Nitrate Journal,2008,36(2):144-149.(in Chinese) [2] Ellis A.Testing of novoltex 3-D carbon-carbon integral throat and exit cones (ITECs)[R].AIAA 88-3361,1988. [3] Moutaudon M.Novoltex textures for thermostrctural material[R].AIAA 91-1848,1991. [4] NIE Jingjiang,XU Yongdong,ZHANG Laifei,et al.Mi-crostructure and tensile behavior of multiply needled C/SiC composite fabricated by chemical vapor infiltration[J].Journal of Mater Process Technology,2009,209(1):572-576. [5] Christin F A.A global approach nD architectures and self-sealing matrices:from research to production [J].International Journal of Applied Ceram Technology,2005,2(2):97-104. [6] 史剑.针刺陶瓷基复合材料应力应变响应模拟及验证[D].南京:南京航空航天大学,2011. SHI Jian.Simulation and verification of the stress-strain responding of needle C/SiC composites[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2011.(in Chinese) [7] 李龙,高希光,史剑,等.考虑孔隙的针刺C/SiC复合材料弹性参数计算[J].航空动力学报,2013,28(6):1257-1263. LI Long,GAO Xiguang,SHI Jian,et al.Calculation of needled C/SiC composite elastic parameters in consideration of porosity[J].Journal of Aerospace Power,2013,28(6):1257-1263.(in Chinese) [8] 刘建军,李铁虎,郝志彪,等.针刺技术在C/C复合材料增强织物中的应用[J].宇航材料工艺,2008,38(3):8-10. LIU Jianjun,LI Tiehu,HAO Zhibiao,et al.Application of needling technology on reinforced fabrics of C/C composite materials[J].Aerospace Materials and Technology,2008,38(3):8-10.(in Chinese) [9] Krenkel W,Berndt F.C/C-SiC composites for space applications and advanced friction systems[J].Material Science and Engineering:A,2005,412(1/2):177-181. [10] 高希光,宋迎东,孙志刚.陶瓷基复合材料高精度宏细观统一本构模型研究[J].航空动力学报,2008,23(9):1617-1622. GAO Xiguang,SONG Yingdong,SUN Zhigang.Multi-scale constitute model for ceramic matrix composite by high fidelity generalized method of cell [J].Journal of Aerospace Power,2008,23(9):1617-1622.(in Chinese) [11] 方光武,高希光,宋迎东.单向纤维增强陶瓷基复合材料界面滑移规律[J].复合材料学报,2013,30(4):101-107. FANG Guangwu,GAO Xiguang,SONG Yingdong.Interface slip distribution of unidirectional fiber-reinforced ceramic matrix composites[J].Acta Materiae Compositae Sinica,2013,30(4):101-107.(in Chinese) [12] 李潘,王波,甄文强.2D-SiC/SiC陶瓷基复合材料的拉伸本构模型研究[J].中国陶瓷工业,2013,20(5):10-14. LI Pan,WANG Bo,ZHEN Wenqiang.Tensile constitutive model of 2D-SiC/SiC ceramic matrix composites [J].China Ceramic Industry,2013,20(5):10-14.(in Chinese) [13] 管国阳,矫桂琼,张增光.2D-C/SiC 复合材料的宏观拉压特性和失效模式[J].复合材料学报,2005,22(4):81-85. GUAN Guoyang,JIAO Guiqiong,ZHANG Zengguang.Uniaxial macro-mechanical property and failure mode of a 2D-woven C/SiC composite[J].Acta Materiae Compositae Sinica,2005,22(4):81-85.(in Chinese) [14] Murakami S,Kamiya K.Constitutive and damage evolution equations of elastic-brittle materials based on irreversible thermodynamics[J].International Journal of Rock Mechanics and Mining Sciences,1997,39(4):473-486. [15] Chaboche J L,Maire J F.A micromechanics based CDM model and it's application to CMC's[J].Aerospace Science and Technology,2002,6(2):131-145. [16] 常岩军,矫桂琼,王波,等.三维机织陶瓷基复合材料的剪切性能及损伤研究[J].无机材料学报,2007,22(1):113-118. CHANG Yanjun,JIAO Guiqiong,WANG Bo,et al.Mechanical properties and damage process of a three-dimensional woven ceramic composite under in-plane shear loading[J].Journal of Inorganic Materials,2007,22(1):113-118.(in Chinese) [17] GAO Xiguang,LI Long,SONG Yingdong.A tempera- ture-dependent constitutive model for fiber-reinforced ceramic matrix composites and structural stress analysis[J].International Journal of Damage Mechanics,2014,23(4):507-522. [18] 刘新东,郝际平.连续介质损伤力学[M].北京:国防工业出版社,2011.
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