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England has examined the two-dimensional problem of a mode I crack opened under constant pressure between two dissimilar materials. But in many cases, it has to be considered that a crack under mixed-mode conditions is lying in a similar material such as aluminum alloy. In this paper, therefore, equations of mode I and mode II stress distributions ??yy, ??xy were derived according to opening/sliding...
The classical tension test of 5A06 aluminum alloy from 23??C to 500??C is done on MTS 810 material testing machine. In this paper, the results show that the strain-hardening effects are obvious when temperature below 200??C. Based on the experiment results, the simplified constitutive model JC is established at high temperature. In that model, the effect of strain rate is not be concerned, while the...
According to the distributing characteristic of residual stresses in aluminum alloy plate, this paper adopted modified layer removal method (MLRM) to measure it; based on elastic mechanics theory the solving process was deduced. Using finite element method the process of MLRM was simulated, by loading specimen with a known original stress distribution the stress was worked out with strain datum from...
The objective of this paper is to study the effect of high damping aluminum alloy on dynamic stability of Nipper Mechanism, in order to improve its stability of motion. Based on Euler-Bernoulli beam theory, the partial differential equation of motion with damping was formulated. According to Floquent theory, Galerkin's method and Fourier series method were then applied to obtain the stable and instable...
In this paper an objective fuzzy approach for fast and accurate porosity vision based inspection is presented. An automated methodology of detection of pores, which are formed in aluminum alloys during production of water-pumps for car engines with the die casting method, is described. The proposed method is based on the correlation of the core of pore candidates with twelve developed matrices resulted...
In this paper, the corrosion damage of the aluminum alloy specimens were studied at different temperature for various corrosion times. The surface corrosion damage ratio of aluminum alloy structure was defined to reveal the degree of pit corrosion intensity. Based on the probability model of pitting corrosion growth, a new probability model capable of simulating the surface corrosion damage is developed...
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