Applied Mechanics and Materials Vols. 365-366

Abstract: The section display technology of full-3D gas-assisted injection molding CAE results can describe the plastic melt filling and gas penetration inside the complex gas-assisted product. So, the key technologies of section display of "effective element" algorithm which is based on the pure space analytic geometry thought were introduced in detail. In the end, an instance was given.

Abstract: A lot of scrap LCD green recycling and resource issues have become one of the research hot spots. Whether recovering the internal resources or repairing the internal components, the framework of LCD must be disassembled at first. After analyzing the connections of the LCD framework, a kind of safe, efficient, fast and non-destructive dismantling equipment has been presented in the article. The equipment has the advantages such as non-destruction, good reusability, high degree of automation and quick-and-easy operation. The same model mass dismantling of the LCD frames can be fulfilled in this equipment efficiently.

Abstract: It is known that the stiffened cylinder structure supports external pressure loads in aerospace and marine application subjected to hydrostatic pressure. For relatively low temperature, aluminum or composite cylinder can be appropriate, but at higher temperature, titanium or steel alloy must be considered. Nickel based alloys show excellent corrosion resistance and elevated temperature mechanical strength so that these alloys are now successfully utilized for aerospace and engine application. This paper provides innovative manufacturing process of producing stiffened cylinder for elevated temperature application.

Abstract: The complex process of heat and mass transfer in bio-substrates during convection, vacuum, and thermohygrostat drying was studied. Changes in temperature and moisture content at the center of the wet material were measured before and after the experiment in order to calculate the drying rate (%/h). In the case of convection drying, the inverter frequency within the wind tunnel was set at 10, 20, and 30 Hz (velocities of 2.2, 4, and 6 m/s, respectively). Measurements were then made at 10 and 20 Hz, with temperatures at 50 and 60°C. In the case of vacuum drying, the chamber pressure was set at 0.4, 4.2, and 92 Torr. The thermohygrostat was set at 50°C with humidity levels at 30, 40, and 50%. In conclusion, thermohygrostat is more effective because of the controlled environment, and that drying rate is increased with lower wind velocities and chamber pressures for convection and vacuum drying respectively.

Abstract: Current scheduling approach for multiple objective flexible job shop problem (FJSP) cannot construct a precise scheduling model and obtain a satisfactory scheduling result at the same time. To deal with this problem, a simulation optimization scheduling approach was presented which was composed of two basic modules: the Fast non-dominated Sorting Genetic Algorithm (NSGA-II) module and Witness simulation module. Firstly, a multi-objective mathematical model was found for FJSP and NSGA-II was applied to solve. Then, a set of Pareto optimal solution was obtained by NSGA-II module. In order to select the final solution from the Pareto optimal solution for FJSP, the simulation model was set up by Witness, every Pareto solution was as input for simulation model. Finally, the final solution can be selected according other performance indicators.

Abstract: Aiming at existing problems about the tower crane anti-collision system at home and abroad, in-depth researches and experimental verification about long-distance ultrasonic ranging technique have been carried out. The design of hardware circuit and software program was completed. The functions such as ultrasonic emission, echo receiving, data acquisition were implemented. The algorithm of delay time estimation based on cross-correlation was researched. The experimental results show that long-distance ultrasonic ranging system can detect the long-distance obstacle (about 25m) effectively and reliably, thus laying technique foundation for the research of the tower crane anti-collision system.

Abstract: This article presents the importance of the measurement for the axis of rotary kiln. Meanwhile, the analysis on the present measurement method for the axis of rotary kiln as well as the corresponding existing problems is made. Furthermore, with the STC51 micro-controller as the core of datas acquisition and LABVIEW as the core of the datas process and display. The real-time measurement system for the axis of rotary kiln is designed.

Abstract: The paper introduces the major defects and its causes of solid rocket motor,the harm and effects of the combustion chamber defects for the stability of motor were clarified,the main methods and their advantages and disadvantages of defect detection currently used in solid rocket motor are also cited and analyzed, and it points out the developing trends about various of detection technology used in conjunction.

Abstract: Six-axis force measurement and real-time force feedback control is realized the basis of the coordination of multi-equipment operation control and conform control, and is developed the technical basis of overloaded operators equipment and other heavy equipment. A surface friction clamping device which is based on the principle of swelling is designed in the paper, and is used to rigid connection between the six-axis force sensor and parallel shaft. The measuring principle of six-axis force sensor is analyzed. Six-axis force sensor dynamometer performance is researched under the influence of clamping device. Modeling and simulation analysis of the structure is obtained by using FEM and loading experiment is designed.

Abstract: Low frequency performance of geophone is important when using microtremor system to explore deep geological structure. This paper reports on improving low frequency performance of a geophone by measuring the capacity attached on a conventional geophone, and the consistency of geophone can be adjusted. The design, principal, and performance of the capacitive position sensing geophone are presented. A prototype geophone is designed and manufactured in the laboratory.