Advanced Materials Research Vols. 690-693

Abstract: The three element drive pump failure was the main reason to reduce inspection cycle of the pump. In this paper, a law of pump valve motion in one stroke was acquired through the establishment of the motion equations of the pump valve in the oil well pump, by making it as the pump valve boundary conditions and using ANSYS / LS-DYNA software, the stress state of the valve housing under the conditions of pump valve impact on the valve cover was analyzed, and as the calculation was shown, under the same conditions, the groove valve cover has the stronger impact than the extended grooved valve housing. The inspection cycle of groove valve housing was 457 days shorter than the extended grooved valve cover according to the theory of the fatigue life, therefore, the extended valve housing can effectively extend the check period.

Abstract: In order to simply the design process and reduce the cost, a virtual prototype of spreader was built in this paper, which was used to simulate the operating condition of spreader in the open coal mine. Then the method of test and verification in engineering application is put forward. Finally, it obtains the parameters of system model of spreaders that satisfy the requirements in actual operating condition by analyzing the test results. The results indicate that the virtual prototype could simulate the real condition and provide exact data for the stable operation and maintenance of spreaders.

Abstract: The vibration mode of main steel structure of bucket wheel stacker reclaimer is complex and changeable, so its modal analysis is necessary. In this paper, the main steel structure of bucket wheel stacker reclaimer was integrally designed and its main parameters were determined. then the finite element model of the main steel structure of the bucket wheel stacker reclaimer was established and the modal analysis was simulated, finally the results of its inherent frequency were calculated by FEA method.

Abstract: Stray current flows through the buried metallic pipeline which exposed to electrochemical corrosion attack. The distribution of stray current is studied by Finite Element Method analysis model, the results indicate that stray current increase gradually along the buried metallic pipeline, reaching to a maximum value in an intermediary point, and then decreases gradually, has a regular bilateral symmetry. The distribution model of stray current is discussed by the inducted electric field theory.

Abstract: The low productivity of conventional single-needle electrospinning inhibits the application of nanofibers to a commercial level. In order to improve the productivity of the electrospinning technique, a terraced spinneret has been designed based on the finite element analysis in this paper. The electric field distribution was modeled with the use of Ansoft Maxwell software. The experiment results demonstrated this special design spinneret has the potential to produce smooth nanofibers on a large scale.

Abstract: A kind of medicinal polymer needle array used for skin drug delivery is proposed in this paper. The structure design, ANSYS analysis, MOLDFLOW simulation and experiment are given. The structure of the micro-needle is that the needles are distributed on a thin-walled substrate. To study the strength of the micro-needle array, ANSYS software is used to check the axial and radial stress strength. The bending strength is improved by optimizing the micro-needle geometric structure. At the same time, in view of the polymer micro-needle array forming process, MOLDFLOW simulation software is used to research the effect that melt flow direction. The results show that the needle of the polymer melts in the micro-needle the cavities flowing along the axial direction is strong. Experiments were conducted to analyze the forming of micro-needle for different polymer, and a higher accuracy polymer micro-needle array is gotten.

Abstract: Drawing cylindrical forgings of 6010 aluminum plate as an example, by using software Dynaform to proceed finite element simulation of forming, research the influence of factors such as pressure machine speed, friction coefficient and fillet radius on limit drawing height. Get best effect when pressure machine speed in 8000 ~ 14000 mm/SEC, the friction coefficient take about 0.2 and fillet radius for 13 mm. It provides theoretical basis for design the size of battery shell and bullet shell and select the suitable process parameters according to highly size of drawing parts

Abstract: To improve the controlling accuracy of pile and pull conditions in tandem rolling progress, relations between filling coefficient and pile and pull coefficient were proposed, and improved pile and pull coefficient mathematical model was obtained. To verify mathematical model, 4-stands trapezoidal stainless steel sieve bar three-dimensional finite element model was established and simulated by ANSYS/LS-DYNA. Parameters, such as filling coefficient, forward slip coefficient, pile and pull coefficient, were obtained. Compared with traditional mathematical model, improved mathematical model reflects the actual pile and pull conditions, and provides a reference for new product pass design optimization and improvement.

Abstract: This paper presents the application of digital simulation to explore the processing of fish fillets of different geometries in an air blast freezer. The main advantage of this virtual processing approach is that it allows for the comparison of the freezing times, production rates, energy consumptions and the costs of freezing fillets of different shapes and sizes. These parameters could be critical for production planning and are discussed in the paper.

Abstract: Based on the kinematics optimization method integrated in ADAMS, the mechanism parameters of the loader boom for a wheel loader are designed to keep the variety of the pylon rotation angle as smaller as possible during the loader boom lifting or falling process. A rigid-flexible coupled model is developed to analyze the dynamic stress of the lift arm and the contact element methodology is adopted to model the coaxial rotary joints connections. The results simulated by ADAMS indicate that the optimization is well fulfilled. Integrated kinematics optimization and strength analysis provide the well basis for further optimization of whole structure.