Papers by Keyword: Fatigue Life Analysis

Abstract: With the the development of super-high pressure technology such as the super-high biological treatment processing, the wire-wound prestressed vessel was widely used as the main pressure bearing structure. It’s proved that the stress was well-distributed along thickness direction and the carrying capacity was improved comparing with traditional pressure vessel. But the deign of wire-wound pressured vessel so far only checks out the fatigue strength margin of winding wire according to the design theory, and lacking of fatigue design of inner cylinder could causes potential safety hazard. So a stress analysis was carried out for prestressed wire-wound vessel with the help of ANSYS, and the fatigue life of the whole prestressed vessel was validated by means of theoretical calculation and the Fatigue Tool .

Abstract: Hinge sleeve of cubic press is the key important equipment which is used in the field of processing and production of super-hard materials, and is always under super high pressure. So the problem of fatigue must be concerned. In this paper, the model of hinge sleeve of cubic press was established in ANSYS and UG. Fatigue of hinge sleeve in cubic press was analyzed by ANSYS. The results of calculation shows that the times of work period of hinge sleeve reaches 61550 under extreme load, satisfied the requirement of design.

Abstract: It is important to analyse the fatigue life of components. We introduced the mechanism of metal fatigue, and systematically discussed the basic methods of fatigue life analysis and its development. The use of nominal stress method and the law of Miner in the fatigue damage accumulation theory are highlighted. The fatigue life analysis for motor base of the glass lifter was completed using this theory on ANSYS Workbench platform and according to the result, structure optimization was completed to make its life longer.

Abstract: Large-scale reinforced earth retaining wall model test has been Designed and completed. The model size is 3.0mχ0.85m χ2.0m(lengthwidthhigh) Slope angle is 70º, Fill with the use of red sandsχtone construction site preparation materials By entering a different amplitude and frequency of the sinusoidal load, to discuss the law of Dynamic characteristics of the model wall and fatigue life under the repetition load. The results showed that, the fatigue life has a linear relationship with the stress amplitude of three reinforced structures ,the logarithm of fatigue life changes with the stress amplitude sensitivity of Gabion reinforced earth retaining wall is low than Geogrid reinforced retaining wall does. The results help to reveal the instability mechanism under cyclic loading, and provide a useful reference for designing the reinforced retaining wall engineering.

Abstract: With large scale increases of the train speed, the development of one reliability test bed which can simulate vibration environment becomes the extremely urgent task. The shaking table is one of key reliability test equipments, and its design and development is in needs immediately. The fatigue strength is basic design index of shaking table. Based on the load time history acquired by track spectrum, combined with finite element model of exciting beam and material properties, the fatigue life of exciting beam is predicted by Miner cumulative damage rule method in this paper.

Abstract: Based on the theory of fatigue life prediction and by using the local stress-strain method and the material S-N curve of Q235 deduced by empirical formula; the fatigue was analyzed for the key parts of large-scale liner vibration screener by means of the general finite element analysis software, ANSYS. Thereby, the working conditions of force bearing, reliability and fatigue life-span of the key parts can be judged. The study will provide a theoretical basis for the design , manufacture, and installation of the large-scale liner vibration screener.