Abstract：Based on the generalized Newtonian fluid constitutive equation, using ARD-RSC fiber orientation model, numerical simulation was used to predict fiber orientation distribution of the long-glass fiber reinforced composite injection molding components by considering the interaction between fibers. The fiber homogenized RVE model of long glass fiber reinforced composites was established through the composite material micromechanics Eshelby inclusion theory and Mean Field homogenization method. By using composite meso-scale modeling, discrete RVE model field, injection molding and structural finite element analysis techniques, the strength of long glass fiber reinforced composites analytical method was proposed. The strength analysis of the thrust-rod injection molded part shows that the simulated dangerous position is in good agreement with the actual damage location. On the basis, the structure of thrust rod is improved, the results show that the maximum principal stress of the rod is reduced by 57.18% under the tensile load and 71.25% under the compressive load.
 BAKSHI S R,KESHRI A K,AGARWAL A. A comparison of mechanical and wear properties of plasma sprayed carbon nanotube reinforced aluminum composites at nano and macro scale[J]. Materials Science and Engineering:A,2011,528:3375-3384.
 GUZ I A,RODGER A A,GUZ A N,et al. Developing the mecha-nical models for nanomaterials[J]. Composites Part A:Applied Science and Manufacturing,2007,38(4):1234-1250.
 ZHANG L J,WEBSTER T J. Nanotechnology and nanomaterials:promises for improved tissue regeneration[J]. Nanotoday, 2009,4(1):66-80.
 STONE V,NOWACK B,BAUN A,et al. Nanomaterials for environmental studies:classification, reference material issues, and strategies for physico-chemical characterisation[J]. Science of the Total Environment,2010,408(7):1745-1754.
 LI X D,BHUSHAN B,TAKASHIMA K,et al. Mechanical characterization of micro/nanoscale structures for MEMS/NEMS applications using nanoindentation techniques[J]. Ultramicroscopy,2003,97:481-494.
 TAMBE N S,BHUSHAN B. Scale dependence of micro/nano-friction and adhesion of MEMS/NEMS materials, coatings and lubricants[J]. Nanotechnology,2004,15(11):1561-1570.
 SUMANT A V,AUCIELLO O,CARPICH RW,et al. Ultrananocrystalline and nanocrystalline diamond thin films for mems/nems applications[J]. MRS Bulletin,2010,35(4):281-288.
 ZHU P Z,HU Y Z,MA T B, et al. Study of AFM-based nanometric cutting process using molecular dynamics[J]. Applied Surface Science,2010,256:7160-7165.
 ZHOU S X,WU L M,SUN J,et al. The change of the properties of acrylic-based polyurethane via addition of nano-silica[J]. Progress in Organic Coatings,2002,45(1):33-42.
 LLIE N,HICKEL R. Macro-, micro-and nano-mechanical investigations on silorane and methacrylate-based composites[J]. Dental Materials,2009,25(6):810-819.
 KELLY A. Composite materials after seventy years[J]. Journal of Materials Science,2006,41:905-912.
 TAHA M A. Practicalization of cast metal matrix composites (MMCCs)[J]. Materials & Design,2001,22:431-441.
 SCHALLER R. Metal matrix composites, a smart choice for high damping materials[J]. Journal of Alloys and Compounds,2003,355:131-135.
 CHO J,JOSHI M S,SUN C T. Effect of inclusion size on mechanical properties of polymeric composites with micro and nano particles[J]. Composites Science and Technology,2006,66:1941-1952.
 PELLICER E,VAREA A,PANE S,et al. Nanocrystalline electroplated Cu-Ni:metallic thin films with enhanced mechanical properties and tunable magnetic behavior[J]. Advanced Functional Materials,2010,20:983-991.
 ZHU X Y,LIU X J,ZONG R L,et al. Microstructure and mechanical properties of nanoscale Cu/Ni multilayers[J]. Materials Science and Engineering:A,2010,527:1243-1248.
 于超,任会兰,宁建国.钨合金力学性能表征分子动力学模拟[J].材料工程,2014(10):82-89. YU C,REN H L,NING J G. Characterizations of tungsten alloy mechanical property by molecular dynamic simulations[J]. Journal of Materials Engineering,2014(10):82-89.
 PEI Q X,LU C,LEE H P,et al. Study of materials deformation in nanometric cutting by large-scale molecular dynamics simulations[J]. Nanoscale Res Lett,2009,4:444-451.
 TONG Z,LIANG Y C,JIANG X Q,et al. An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools[J]. Applied Surface Science,2009,290:458-465.
 MUSAZADAH M H,DEHGHANI K. Molecular dynamic simulation of crack propagation in nanocrystalline Ni containing different shapes and types of second phases[J]. Computational Materials Science,2011,50:3075-3079.
 CHEN S D,ZHOU Y K,SOH A K. Molecular dynamics simulations of mechanical properties for Cu(001)/Ni(001) twist boun-daries[J]. Computational Materials Science,2012,61:239-242.
 RAFⅡ T H,SHODJA H M,DARABI M,et al. Molecular dynamics simulation of crack propagation in fcc materials containing clusters of impurities[J]. Mechanics of Materials,2006,38:243-252.
 CHELLALI M R,BALOGH Z,BOUCHIKHAOUI H,et al. Triple junction transport and the impact of grain boundary width in nanocrystalline[J]. Nano Letters,2012,12(7):3448-3454.
 白清顺,童振,梁迎春,等. 单晶Cu纳米杆拉伸力学特性的尺寸依赖性模拟[J]. 金属学报,2009,46(10):1173-1180. BAI Q S,TONG Z,LIANG Y C,et al. Simulation of scale dependency on tensile mechanical properties of single crystal copper nano-rod[J].Acta Metallurgica Sinica,2009,46(10):1173-1180.
 成聪,陈尚达,吴勇芝,等. 不同应变率下纳米多晶Cu/Ni薄膜变形行为的分子动力学模拟[J]. 材料工程,2015,43(3):60-66. CHENG C, CHEN S D, WU Y Z, et al. Molecular dynamics simulations of deformation behaviors for nanocrystalline Cu/Ni films under different strain rates[J]. Journal of Materials Engineering,2015,43(3):60-66.
 GUO Y B,LIANG Y C,CHEN M J,et al. Molecular dynamics simulations of thermal effects in nanometric cutting process[J]. Science China Technological Sciences,2010,531:870-874.
 FOILES S M,BASKES M I,DAW M S. Embedded-atom method functions for the fcc metals Cu,Ag,Au,Ni,Pd,Pt,and their alloys[J]. Physical Review B,1986,33:7983-7991.
 DAW M S,FOILES S M,BASKES M I. The embedded-atom method:a review of theory and applications[J]. Materials Science Reports,1993,9:251-310.
 HONEYCUTT J D,ANDERSEN H C. Molecular dynamics study of melting and freezing of small Lennard-Jones clusters[J]. Journal of Chemical Physics,1987,91:4950-4963.