Simulation The In Situ Mg₂Si Particles Influence On Mechanical Properties Of Magnesium Matrix Composites

Situ synthesized Mg2Si particles reinforced magnesium matrix compositematerials with high specific strength、specific stiffness, and has good wear resistance、high temperature resistance and damping properties, In many sectors of aerospace、automotive、electronics、sports and other widely used。But for the magnesium matrixcomposites reinforced situ synthesized Mg2Si particles are also still in its infancy。When situ synthesized Mg2Si particles reinforced magnesium matrix composites in thecase of the force, due to the presence of in situ synthesized Mg2Si particles, compositematerials can cause internal stress field uneven and making composite partial failure。So, research which has great significance for the development of composite materialsand the relationship between microstructure and mechanical properties of thestructure。In this paper, using the finite element analysis software ANSYS, establish in situMg2Si particles reinforced magnesium matrix composite finite element model whenenhanced in situ Mg2Si particles uniform and random distribution, enhanced in situMg2Si particles randomly distributed model was established by secondarydevelopment of C language binding ANSYS APDL language, achieved by applying atensile load to realize the process analog of the mechanical properties of thecomposites。Then analysis in situ Mg2Si enhanced particles at case of uniform andrandom distribution, different radius、volume fraction、location or other factors of insitu Mg2Si enhanced particles how to effect on the mechanical properties ofmagnesium matrix composites, and comparative analysis under the same conditions,the influence of stress field when reinforcing particles different distribution methods inthe matrix。Simulation results show that：For in situ Mg2Si particles reinforced magnesiummatrix composites, enhanced particle material microstructure affects the stressmagnitude and distribution of its own。Different particle size in situ Mg2Si differenteffects on the mechanical properties of the composites, when enhanced particlesuniformly distributed, with the increase of particle size, the interface between thelarger particles of similar stress concentration, yield strength will vary with changes inparticle size；Enhanced particle volume fraction is an important factor affecting theperformance of composite materials, the larger the volume fraction of reinforcement, stress distribution becomes nonuniform matrix, stress concentration resulting valuegradually increases, on the other hand, elastic modulus of the composites willgradually increase；When enhanced particles randomly distributed：the distancebetween the particles, Angle of the central connection between the particles and theload direction is a major factor affecting the mechanical properties of the composites,when the particles are smaller spacing and central connection between the particlesparallel to the direction of the load，Between the base region of maximum stressconcentration is generated；Under the same conditions，distribution of different ways ofenhanced particle, effect on stress distribution and size of the composite material isdifferent。...