Advanced Materials Research Vols. 503-504

Abstract: Fully-welded ball valve has been applied in large oil and gas pipelines, and its quality is directly related to the safety of the transportation of national energy. The wall thickness of 48″600lb ball valve is greater than theoretical design thickness. In this article, FEM software was used to design ultimate bearing pressure using linear stress analysis method. By applying different inner pressure load, the stress distribution of the ball valve was studied. Stress verification lines were draw at stress maximum location and each stress item were checked under corresponding safe value. Optical design obtained maximum inner pressure can provide theoretical support for practical engineering application

Abstract: According to the development of the application program of the injection molding feeding system for thick wall plastic production .Studied the development method of the application program based on the redevelopment module Pro/Toolkit of Pro/E by DLL (dynamically linked library) in the VC++ programming environment.

Abstract: With heat conduction differential equation of the transient temperature field, Galerkin method is adopted to deduce the three-dimensional finite element formula; based on the test result of temperature field, the actual temperature of the environment inside the tunnel shall be exerted on surface of the second lining concrete as load, thus establish the three dimensional computation model of the temperature field of tunnel in cold region. Next, on basis of the model, numerical analysis on cross section of burial depth and longitudinal direction of tunnel in cold region with and without thermal insulating layer, so as to provide theoretical basis for thickness and longitudinal length of thermal insulating layer laid in tunnel of cold region.

Abstract: Glass forming process is a high-volume fabrication method for producing glass containers. In this paper, the mechanisms of glass forming process were analyzed. Combined the coupled thermo-mechanical analysis with the finite element method (FEM) simulation, it was carried out to analyze the key process factors such as forming temperature, forming pressure, friction coefficient. The results show that forming pressure has the greatest influence on the stress.

Abstract: This study focuses on the automated packaging systems of the Phthalic anhydride made up of the PLC of Siemens S7-200 series and the weighing instruments, the sensor is mainly used to complete the Phthalic anhydride product weighing, bagging, sealing, and other functions, and The field text display , the configuration software of PC is used to display real-time monitoring interface. The weighing, bagging, sealing and other functions of the Phthalic anhydride product is completed mainly. The coarse and fine spiral motor is used to ensure system accuracy in the entire Control of the packaging process, the Phthalic anhydride product quickly and accurately weighing can be completed in this design. The application of the photoelectric sensor control the sewing machine start and stop of the sealed packaging process fast and accurate; Combination of TD400C and SIMATIC WinCC configuration software provides the packaging system fine human-computer interface.

Abstract: The wind power is an important energy complement to fossil fuels consumption, bears the advantages of green, renewable and carbon emission-free. The wind energy has been developing and exploiting in recent decades around the world, but because wind power holds high fluctuation and instability, direct grid connection brings about some technical and management problems. Non-grid-connection wind power consumes the generated power into some high energy consumption fields, it is a local method to utilize wind power, and bears convenience, high efficiency, and practicality. In the paper, a virtual reality system is built, which demonstrates the aluminum electrolysis by non-grid-connection wind power. Based on the developed virtual reality simulation system, the key processes are able to offline analyzed, and the engineering configuration is capable of demonstrated, meanwhile, some key engineering problems are predicted in advance.

Abstract: On the foundation of a brief summary of thermal deplying inspection technology on carbon fiber/resin composite laminate, this paper analyzes the application of it on the composite material damage detection. Thermal deplying technology takes advantage of the volatile performance of resin matrix in high temperature environment and marks damages with gold chloride reagent to detect damages. The results show that thermal deplying inspection technology facilitates damage detection and failure analysis of composite material structure.

Abstract: In order to improve that quality of sample and decrease the stress during process, it is of great importance to study the residual stress distribution during direct laser metal deposition (LMDS) process. In this paper, according to the “element life and death” technique of finite element method ,with APDL, we simulated the effects of long edge reciprocating scanning method, short edge reciprocating scanning method and direction orthogonal changing in different layers reciprocating scanning method to residual stress distribution during whole LMDS process are studied. The residual stress distribution under different scanning methods is researched in detail. Using the same process parameters, the simulation result show good agreement with the features of sample which fabricated by LMDS

Abstract: An Integrated System of Plastic Mold CAD/CAE for key parts of large scale plastic mold is established, which consists of the three subsystems the CAD subsystems, the CAE subsystems and the materials query subsystem. The functions of the integrated system are realized based on Visual Studio platform, by using SQL Server Database, Pro/E, Pro/TOOLKIT and ANSYS Optimum Design. The integrated system provides seamless integration functionality through sharing and exchange of the same parameters between the CAD subsystem and the CAE subsystem. The parameters of the parts are saved in the SQL Server in the integrated system of plastic mold CAD/CAE. Firstly, the parameters values can be identified by CAD primary design in the CAD subsystem; secondly, The CAE subsystem reads these parameters and gains the material parameters from the materials query subsystem. Then, the remote optimization is conducted in the CAE subsystem; lastly, the CAD subsystem obtains final parameters values from the CAE subsystem, according to the results of remote optimization

Abstract: Usually sense airdrop by parachute is technology for delivery to the specified point, above the target point, to a certain initial velocity dropped supplies will be released, due to put things in a fall influenced by many factors (such as wind disturbance, topography and other factors ),the launch point and target placement will have a certain bias. United States and some European countries started in 2005 to examine the controlled parachute drop, and achieved certain results, this paper will analyze umbrella dropped supplies for the complex topography of the control process