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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 50 (1993), S. 57-66 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The tensile strain rate effect in tensile strength and elongation at break for a series of filled dummy hydroxy-terminated polybutadiene (HTPB) propellant binders was studied. The data were obtained at various tensile strain rates from 10-4 to 10-1 s-1 on two types of specimens at room temperature. The “high velocity ductility” behaviour, which is qualitatively similar to those of unfilled elastomers, was revealed. This means that the breaking strain increases markedly at elevated strain rates. For “Bukkon-type” and rod-shaped specimens, test results are consistent with each other. The fact that the increased filled solids level leads to a decreased breaking elongation capability and an increased tensile strength was obviously found. © 1993 John Wiley & Sons, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The international journal of advanced manufacturing technology 8 (1993), S. 102-110 
    ISSN: 1433-3015
    Keywords: Robot programming ; Flexible manufacturing cell ; FMC ; Simulation modelling ; Machine utilisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The development is described of a flexible manufacturing cell (FMC) programming and simulation system called FMCPS, which generates robot programs for a 6-DOF industrial robot. The development of FMCPS is based on an FMC that is being developed at UMIST. The cell consists of a Fanuc 600 ARCmate industrial robot, a Takisawa MAC V3 CNC machining centre and an MHP MT-50 CNC turning centre. The software has been developed on a SUN 4/110 workstation running under the UNIX operating system, using three-dimensional SUNCORE interactive graphics and SUNVIEW window systems. An event-oriented robot-programming method is used in the FMCPS. This method divides the robot tasks into different events. The user needs to define the points of the robot gripper route and the corresponding data for each event. The Cartesian coordinates of the points in the robot gripper paths are then transformed to the six robot joint angles by a variant inverse kinematics iteration method. These robot joint angles are used in the simulation model which generates robot programs suitable for the Fanuc robot. A three-dimensional, wire-frame-based graphical model is used for simulation. The user can observe the simultaneous animation of the robot movement, and display machine tool paths in separate graphics windows on the screen simultaneously. The various activities in the cell are simulated in pseudo-parallel mode by taking advantage of the multi-tasking and piping features of UNIX. At the end of a simulation exercise, the user is provided with the facility to obtain a performance report for the FMC which gives information on total operation time and on robot and machine utilisation, in addition to the robot program.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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