The Finite Element Analysis Of Mechsnics Properties Of Particle-Reinforced Copper Matrix Composites

Particles-reinforced copper matrix composite material is a new type of composite material in recent years. It has high conductivity, strength and good thermal properties; besides, it has good hardness and endurance. Therefore it not only can be used as contact material, welding electrodes, integrated circuit lead frame, can also be used as caster mould material. It's a new material which has a widely perspective.In this paper, a finite element model of particle reinforced copper matrix composite material is proposed, and several key mechanical problems are studied by this model. The major contents are following:(1) The analysis model of three-dimensional particle reinforced copper matrix composite material is built. The affections of composite material interface stress distribution are studied by different shapes, volume fraction of particles and changing particles'phase angle. It is found that: spherical particle, more particles content, and 15 degrees phase angle are better for composite material mechanical properties. This work summarizes the previously reported results and extends the effect factors of composite mechanical properties.(2) The composite crack intensity factor is calculated by ANSYS, the effect on the stress intensity factor when the crack happens to the matrix and particles, as well as the volume ratio, radius, modulus ration on crack intensity factor are analyzed. It is found that: crack grows in the matrix, stress intensity factor increases linearly; Crack grows in particle, stress intensity factor increases nonlinearly; Intensity factor K1 increases when the volume fraction of particles decreases and increases when the modulus ratio of particles and matrix increases. These analyses provide theoretical evidences to the manufacture of composite material.(3) The analysis model of three-dimensional particle reinforced copper matrix composite material is built to adopt the stress-strain relationship. The modulus is worked out by the relationship and compared with the results of the Mori-Tanaka method, differential method and series model. It is found that: the result of ANSYS is relative closed to differential method and Mori-Tanaka method.