Finite Element Analysis Of Microcosmic Stress On The Interface Of Zinc-Aluminium Composite

In recent years, microcosmic mechanics calculated by finite element is applied widely in stress-transfered mechanism of composite, and actual microcosmic structure of composite is reflected by microcosmic mechanics. There is interface of composite forming at combining location of different elements, interface of composite has obvious effect on property of physics mechanics of composite, so study of interface becomes more and more important. In spite of so much achievement in interface of composite, the research of particle-filled Zinc-Aluminium composite is fairly few.Most intent of the text is that microcosmic mechanics of interface of Zinc-Aluminium composite is researched by finite element. The analyzing model is set up , then stress distribution along the interface is studied. Two cases are calculated which are tensile or compress stress. Compared calculated result with experiment result, the finite element model is correct, then the basic reason of fracture of composite is analysed.Stress distribution of Al₂O₃ particle-filled or steel particle-filled ZA27 composite and the effect of crack on stress distribution along interface are studied.In the case of tensile stress, de-bonding often occur at the pole of particle. In the case of compress stress, the crack forming and extending result from blocked location-alternation at the particle or tensile pore of matrix.In the case of tensile stress, the stress distributions near crack along interface change obvious, the stress descends at the point of crack, and the stress focus at the point of crack and extend along the point of crack. In the case of compress stress, the effect of crack in matrix on stress distribution localized at very small area where the crack is at, degree of stress focusing in matrix is greater than the case in particle.