Method of failure mode analysis and test verification for fiber reinforced composites turbo-shaft structure
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摘要: 针对连续纤维增强复合材料涡轮轴结构失效模式分析问题,基于宏-细观力学跨尺度分析方法,建立细观力学代表性体积元(RVE)模型,通过编程模拟实现模型的周期性边界条件,计算纤维增强复合材料应力响应,将其均值应力转化为真实应力,确定失效包线。建立连续纤维增强轴结构力学模型,计算轴结构在扭转载荷下的应力响应。通过复合材料层合板主偏轴关系应力转化,将危险单元各方向宏观应力响应计算结果转化到细观力学RVE模型上,即为细观力学RVE模型受载情况。结合细观力学失效边界确定复合材料轴结构危险位置失效模式,当扭转载荷达到5 000~5 500 N·m之间,复合材料最外层即层6(+45°)首先达到基体拉伸失效载荷。开展复合材料轴结构失效模式试验,在扭转载荷达到6 000 N·m时,声发射信号相互叠加,大部分均为中频信号,中频信号多为基体、界面开裂信号。与模拟仿真计算结果对比分析,验证连续纤维增强复合材料涡轮轴结构失效模式分析方法的有效性。利用所建立模型预测了某型发动机低压涡轮轴的失效载荷及失效模式。Abstract: For continuous fiber reinforced composites turbo-shaft structural failure mode analysis, based on the macro-mechanics and meso-mechanics analysis method of cross-scale, a micro-mechanics representative volume element (RVE) model was established, through programming and simulation, the periodic boundary conditions of model were realized, the stress response of fiber reinforced composites was calculated and the mean stress was converted into real stress, then the failure envelope was determined. It established mechanical model of fiber reinforced composite shaft structures, and the principal stress response was calculated. Through the transformation of the principal-partial axial stress for the composite laminated plates, the macroscopic stress response calculation results of the dangerous elements in all directions were transformed into the microscopic mechanics RVE model, reflecting the microscopic mechanics load condition of the RVE model. The failure mode of composite shaft structure at dangerous position was determined by the failure boundary of micro-mechanics; when the torsional load was between 5 000-5 500 N·m, the outermost layer of the composite, also the layer 6 (+45°), reached the tensile failure load of the matrix firstly. The failure mode test of composite shaft structure was carried out; when the torsional load had reached 6 000 N·m, acoustic emission signals stacked with each other, most of which were intermediate frequency signals, of which most were matrix and interface cracking signals. Then compared with the simulation results, it verified the effectiveness of the failure mode analysis method. The failure load and failure mode of a certain engine low pressure turboshaft have been predicted by using the proposed model.
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Key words:
- composites /
- low-pressure turbo-shaft /
- failure mode /
- ,representative volume element /
- failure envelope
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[1] 沙云东,骆丽,贾秋月,等.复合材料轴结构力学性能预测及铺层方案设计[J].材料科学与工程学报,2014,34(2):251-256,300. SHA Yundong,LUO Li,JIA Qiuyue,et al.Predict mechanics behaviors and design of ply schemes for composites (MMC) shafts[J].Journal of Materials Science and Engineering,2014,34(2):251-256,300.(in Chinese) [2] 沙云东,贾秋月,骆丽,等.连续纤维增强金属基复合材料涡轮轴结构承扭特性分析[J].航空动力学报,2016,31(6):1377-1384. SHA Yundong,JIA Qiuyue,LUO Li,et al.Analysis on torsional feature of continuous fiber reinforced metal matrix composite turbine shaft[J].Journal of Aerospace Power,2016,31(6):1377-1384.(in Chinese) [3] 沙云东,陈祎航,郝燕平,等.纤维增强复合材料涡轮轴结构疲劳寿命预测[J].航空动力学报,2017,32(4):769-779. SHA Yundong,CHEN Yihang,HAO Yanping,et al.Fatigue life prediction of fiber reinforced composites turbine shaft structure[J].Journal of Aerospace Power,2017,32(4):769-779.(in Chinese) [4] 梁春华.连续纤维增强的金属基复合材料部件在航空涡扇发动机上的应用[J].航空制造技术,2009(15):32-35. LIANG Chunhua.Application of continuous fiber reinforced metal matrix composite component on turbofan aeroengine[J].Aeronautical Manufacturing Technology,2009(15):32-35.(in Chinese) [5] KOOP W,CROSS C.Metal matrix composites structural design experience[R].AIAA-90-2175,1990. [6] SODEN P D,HINTON M J,KADDOUR A S.A comparison of the predictive capabilities of current failure theories for composite laminates[J].Composites Science and Technology,1998,58(7):1225-1254. [7] HYDE T H,PUNYONG K,BECKER A A.Experimental failure investigation for a titanium metal matrix composite with +45°and ±45° fibre orientation[J].Journal of Materials:Design and Applications,2015,229(1):51-63. [8] SPRING S,KURZ W,KRISHNAMURTHY K,et al.The development of a fiber-reinforced titanium matrix composite low pressure turbine shaft for turboshaft engine[R].Montreal,Quebec,Canada:American Helicopter Society 58th Annual Forum,2002. [9] SCHULTE K.World wide failure exercise on failure prediction in composites[J].Composites Science and Technology,2002,62(12/13):1479-1479. [10] HINTON M J,KADDOUR A S,SODEN P D.A further assessment of the predictive capabilities of current failure theories for composite laminates[J].Composites Science and Technology,2004,64(3/4):549-588. [11] 黄争鸣.桥联理论研究的最新进展[J].应用数学和力学,2015,36(6):563-581. HUANG Zhengming.Latest advancements of the bridging model Theory[J].Applied Mathematics and Mechanics,2015,36(6):563-581.(in Chinese) [12] HUANG Y,JIN C,HA S K.Strength prediction of triaxially loaded composites using a progressive damage model based on micro-mechanics of failure[J].Journal of Composite Materials,2013,47(6/7):777-792. [13] HUANG Zhengming.Correlation of the bridging model predictions for triaxial failure strengths of composites with experiments[J].Journal of Composite Materials,2013,47(6/7):697-731. [14] HUANG Zhengming.Simulation of the mechanical properties of fibrous composites by the bridging micro-mechanics model[J].Composites Part A,2001,32(2):143-172. [15] COFFIN L F Jr.A study of the effects of cyclic thermal stresses on a ductile metal[J].Transactions of the American Society of Mechanical Engineers,1954,76:931-950. [16] NAHAS M N.Survey of failure and post-failure theories of laminated fiber-reinforced composites[J].Journal of Composites Technology and Research,1986,8(4):138-153. [17] HAUSMANN J,SCHURMANN H,PETERS P,et al.Recent developments in SiC-fibre reinforced titanium shafts[R].San Sebastian,Spain:2006 International Congress on Innovative Solutions for the Advancement of the Transport Industry (TRANSFAC06),2006. [18] DUDA C,ARVIEN C,FROMENTIN J F.Metal lurgical features related to liguid route Ti alloy coating of C coated SiCcvd filaments[C]∥Proceeding of the 10th World Conference on Titanium.Hamburg:Wiley-VCH Verlag GmbH & Co.KGaA,2003:2488-2494. [19] HINTON M J,KADDOUR A S,SODEN P D.A comparison of the predictive capabilities of current failure theories for composite laminates,judged against experimental evidence[J].Composites Science and Technology,2002,62(12/13):1725-1797. [20] ECHAABI J,TROCHU F,GAUVIN R.Review of failure criteria of fibrous composite materials[J].Polymer Composite,1996,17(6):786-798. [21] 汪凌云.论纤维增强复合材料的失效准则[J].纤维复合材料,1995(1):1-8,15. WANG Lingyun.Discussion of failure criteria for fibre reinforced composite material[J].Fibre Composite,1995(1):1-8,15.(in Chinese) [22] 沙云东,姜卓群,骆丽,等.SiC/TC4复合材料横向拉伸应力集中系数的表征及试验验证[J].推进技术,2020,41(5):1185-1192. SHA Yundong,JIANG Zhuoqun,LUO Li,et al.Characterization and experimental verification of transverse tensile stress concentration coefficient in SiC/TC4 composites[J].Journal of Propulsion Technology,2020,41(5):1185-1192.(in Chinese) [23] 王玉敏,张国兴,张旭,等.连续SiC纤维增强钛基复合材料研究进展[J].金属学报,2016,52(10):1153-1170. WANG Yumin,ZHANG Guoxing,ZHANG Xu,et al.Advances in sic fiber reinforced titanium matrix composites[J].Acta Metallurgica Sinica,2016,52(10):1153-1170.(in Chinese) [24] 沙云东,田建光,丁光耀,等.SiC/TC4复合材料轴结构力学性能分析及试验验证[J].推进技术,2018,39(11):2556-2563. SHA Yundong,TIAN Jianguang,DING Guangyao,et al.Mechanical properties analysis and experimental verification of SiC/TC4 composite shaft structure[J].Journal of Propulsion Technology,2018,39(11):2556-2563.(in Chinese) [25] 黄争鸣.复合材料破坏与强度[M].北京:科学出版社,2006.
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