| Titanium matrix composites have characters of low density and high elastic modulusand so on, which has got a greater development in the field of aerospace and automotiveindustries since the middle period of1990s. The material will become the candidatematerials of high supersonic aerospace craft and the aeroengine of next generationadvanced.In this paper, a finite element model of particle reinforced Titanium matrix compositematerial is proposed, and several key mechanical problems are studied by this model. Themajor contents are following:(1) Construct a three-dimensional analysis model of particle reinforced titaniummatrix composites, Different shape with different volume fraction changes on thecomposite reinforcing particles and matrix stress distribution results show that theinfluence of spherical particles of30%of the volume fraction of particles reinforcedtitanium matrix composites had good effect of the existing research results, the results forreference from the point of view of mesoscopic mechanics analysis of the influence factorsof the mechanical properties of composite materials.(2) The composite crack intensity factor is calculated by ANSYS, the effect on thestress intensity factor when the crack happens to the matrix and particles, as well as thevolume ratio, radius, modulus ration on crack intensity factor are analyzed. It is found that:crack grows in the matrix, stress intensity factor increases linearly; the birth and deathelement technique is calculated by ANSYS to simulate the crack extension process theanalysis of the matrix and interface for processing and preparation of composite materialshave provided the certain theory basis.(3) The analysis model of three-dimensional particle reinforced Titanium matrixcomposite material is built to adopt the stress-strain relationship. To compare and analysisWith the result of parallel method and series method, found that the finite element method to predict the elastic modulus is reasonable and feasible. |
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