不同形状砂尘高速冲蚀TC4平板的数值仿真
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摘要
含有砂尘的空气吸入发动机,会与压气机转子叶片以较高的相对速度发生碰撞,产生砂尘冲蚀现象,严重影响到飞行器飞行安全。通过采用能较好适应大变形的光滑粒子流体动力学(SPH)方法和有限元(FE)耦合的方法,建立不同形状砂尘冲蚀TC4平板模型,研究TC4平板表面受砂尘高速冲蚀的典型损伤形式及其规律。结果表明:砂尘尖角越小,冲击产生的弹坑越深,所造成的损伤也越大;随砂尘逐颗撞击平板,弹坑的深度变化越来越小,表现为平板表面的塑性硬化过程;在砂尘连续冲击下,受到冲击角的影响,损伤处的堆积物可能被砂尘冲脱平板,也可能被重新压回弹坑。
The air inhalation engine containing sand dust could collide with the compressor rotor blade at a higher relative speed and produce sand dust erosion,seriously affecting the flight safety of the aircraft.The model of TC4 plate with different shapes of sand dust was established by using the smoothed particle hydrodynamics(SPH)and finite element(FE)coupling,which could better adapt to the large deformation.The typical damage forms and laws of high speed erosion of the sand dust on the surface of the TC4 plate were studied.Results showed that the smaller sand dust angle meant the deeper impact crater and the greater damage.With the sand dust hitting the plate,the depth of the pit became smaller and smaller,showing the plastic hardening process of the flat surface;under the continuous impact of the sand dust,the impact angle was affected by the sand dust,the accumulation ofthe damage may be flushed off the plate by sand dust and repressed back to the crater.
The air inhalation engine containing sand dust could collide with the compressor rotor blade at a higher relative speed and produce sand dust erosion,seriously affecting the flight safety of the aircraft.The model of TC4 plate with different shapes of sand dust was established by using the smoothed particle hydrodynamics(SPH)and finite element(FE)coupling,which could better adapt to the large deformation.The typical damage forms and laws of high speed erosion of the sand dust on the surface of the TC4 plate were studied.Results showed that the smaller sand dust angle meant the deeper impact crater and the greater damage.With the sand dust hitting the plate,the depth of the pit became smaller and smaller,showing the plastic hardening process of the flat surface;under the continuous impact of the sand dust,the impact angle was affected by the sand dust,the accumulation ofthe damage may be flushed off the plate by sand dust and repressed back to the crater.
引文
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[18] AZIMIAN M,SCHMITT P.Numerical investigation of single and multi impacts of angular particles on ductile surfaces[J].Wear,2015,342/343(8):252-261.
[2] WANG Yufei,YANG Zhenguo.Finite element model of erosive wear on ductile and brittle materials[J].Wear,2008,265(5):871-878.
[3]廉晓庆,蒋明学.基于有限元模拟研究不同形状磨料对高铝砖的冲蚀磨损[J].硅酸盐学报,2014,42(6):762-767.LIAN Xiaoqing,JIANG Mingxue.Erosion wear of high alumina brick with different shapes of abrasive based on finite element simulation[J].Journal of the Chinese Ceramic Society,2014,42(6):762-767.(in Chinese)
[4] GHOBEITY A,CIAMPINI D,PAPINI M.An analytical model of the effect of particle size distribution on the surface profile evolution in abrasive jet micromachining[J].Journal of Materials Processing Technology,2009,209(5):6067-6077.
[5] JOHNSON G R.Linking of Lagrangian particle methods to standard finite element methods for high velocity impact computations[J].Nuclear Engineering and Design,1994,150(2/3):265-274.
[6] JOHNSON G R,STRYK R A,BEISSEL S R.SPH for high velocity impact computations[J].Computer Methods in Applied Mechanics and Engineering,1996,139(1/2/3/4):347-373.
[7] FERNA'NDEZ-ME'NDEZ S,BONET J,HUERTA A.Continuous blending of SPH with finite elements[J].Computers and Structures,2005,83(17/18):1448-1458.
[8]张志春,强洪夫,高巍然.一种新型SPH-FEM耦合算法及其在冲击动力学问题中的应用[J].爆炸与冲击,2011,31(3):244-249.ZHANG Zhichun,QIANG Hongfu,GAO Weiran.A new SPH-FEM coupling algorithm and its application in shock dynamics[J].Explosion and Shock,2011,31(3):244-249.(in Chinese)
[9]林晓东,汤积仁,卢义玉.基于SPH-FEM耦合算法的磨料水射流破岩数值模拟[J].振动与冲击,2014,33(18):171-176.LIN Xiaodong,TANG Jiren,LU Yiyu.Numerical simulation of rock breaking by abrasive water jet based on SPHFEM coupling algorithm[J].Jouranl of Vibration and Shock,2014,33(18):171-176.(in Chinese)
[10]张文超,武美萍,任仲贺.基于LS-DYNA仿真的射流加工参数分析[J].表面技术,2017,46(10):268-276.ZHANG Wenchao,WU Meiping,REN Zhonghe.Analysis of jet processing parameters based on LS-DYNA simulation[J].Surface Technology,2017,46(10):268-276.(in Chinese)
[11] TAKAFFOLI J M,PAPINI M.Material deformation and removal due to single particle impacts on ductile materials using smoothed particle hydrodynamics[J].Wear,2012,274/275(3):50-59.
[12] SCHUHMACHER A,TCHERNIAK D.Engine contribution analysis using a noise and vibration simulator[J].Sound and Vibration,2009,43(1):16-21.
[13] SCHUHMACHER A.Techniques for measuring the vibro-acoustic transfer function[J].Sound and Vibration,2010,44(3):6-12.
[14] JOHNSON G R,COOK W H.Fracture characteristics of three metals subjected to various strains,strain rates,temperatures and pressures[J].Engineering Fracture Mechanics,1985,21(1):31-48.
[15] JOHNSON G R,COOK W H.A constitutive model and data for metals subjected to large strains,high strain rates and high temperatures[C]∥Proceedings of the 7th International Symposium on Ballistics.Hague:International Symposium on Ballistics,1983:541-548.
[16] OKA Y I,YOSHIDA T.Practical estimation of erosion damage caused by solid particle impact:Part 2mechanical properties of materials directly associated with erosion damage[J].Wear,2005,259(1):102-109.
[17] OKA Y I,NAGAHASHI K.Measurements of plastic strain around indentations caused by the impact of round and angular particles,and the origin of erosion[J].Wear,2003,254(12):1267-1275.
[18] AZIMIAN M,SCHMITT P.Numerical investigation of single and multi impacts of angular particles on ductile surfaces[J].Wear,2015,342/343(8):252-261.