Energy directors

Air Force Research Laboratory, Directed Energy Directorate, Kirtland AFB,... 

This work was sponsored in part by the Air Force Office of Scientific Research, and in part by the Air Force Research Laboratory, Directed Energy Directorate. 

T. Nejat Veziroglu Honorary Chairman, ICHMS 2005 President, Int. Association for Hydrogen Energy Director, UNIDO-ICHET... 

Director of the Nuclear Science and Energy Directorate. Japan Atomic Energy Agency, Japan... 

I have been appointed to the position of Director of the Nuclear Science and Energy Directorate, which covers from the fundamental studies such as nuclear data, reactor physics, materials sciences as well as the research development on VHTR and nuclear hydrogen research. 

X. Yan, K. Kunitomi, R. Hino and S. Shiozawa Nuclear Applied Heat Technology Division Nuclear Science and Energy Directorate Japan Atomic Energy Agency Oarai-Machi, Ibaraki-ken 311-1394, Japan... 

Japan Atomic Energy Agency Nuclear Science and Energy Directorate 4002, Narita-cho, Oarai-machi, Ibaraki-ken, 311-1393 JAPAN Tel +81-29-266-7572, Fax +81-29-266-7741,... 

Diana J. Bauer, Ph.D., US Dept. Of Energy, Director of the Office of Energy Policy Analysis and Integration Office of Energy Policy and Systems Analysis, for permission to use two images. 

The Energy Directorate of the European Economic Comission (EEC) requested the petroleum and automobile manufacturing industries to conduct a study into these relationships to obtain a rational planning basis for any future legislative actions dealing with vehicle exhaust emissions and energy conservation. 

Houston Advanced Research Center (HARC) George R. King, Energy Director (281) 364-6050... 

Fig. 8.9. (a) An ultrasonic welding machine, and (b) a section through a moulded part intended for ultrasonic welding, showing the energy director. ... 

Energy director joint design is not generally recommended for the more crystalline materials the scarf joint is preferred. Shear bead joints do not usually offer high strength but are satisfactory where hermeticity is required. The interference joints are successful where a slight warp-age is present which would prevent the full contact area of a scarf joint. 

Ravindra Anil Cabraal (grid-connected and ofT-grid renewable energy), Director, KMRI Lanka (pvt) Ltd., a renewable power development company Consultant, Renewable and Rural Energy, Colombo formerly Lead Energy Specialist at The World Bank,Washington DC... 

Figure 8.8 Stages in the ultrasonic welding process. In Phase 1, the horn is placed in contact with the part, pressure is applied, and vibratory motion is started. Heat generation due to friction melts the energy director, and it flows into the joint interface. The weld displacement begins to increase as the distance between the parts decreases. In Phase 2, the melting rate increases, resulting in increased weld displacement, and the part surfaces meet. Steady-state melting occurs in Phase 3, as a constant melt layer thickness is maintained in the weld. In Phase 4, the holding phase, vibrations cease. Maximum di lacement is reached, and inter-molecular diffusion occurs as the weld cools and solidifies. ...

Figure 26.28 Ultrasonic welding components with triangular energy director.

Besides the energy director, another common joint configuration is the shear joint [2,13]. As shown in Fig. 26.29, in this case there is an interference fit between the parts. The ultrasonic vibration results in local deformation at the interference area leading to viscoelastic heating and melting of the thermoplastic. In this case, it is important to control the downspeed to allow the thermoplastic to melt as the top part moves down. 

Figure 14.19 Ultrasonic welding using an energy director. The energy director is molded onto the upper part being joined. During welding, the horn is in contact with the upper part, and force is applied perpendicular to the axis of the weld interface. Vertical vibratory motion applied to the part results in heat generation and melting of the energy director.

Energy director Wall thickness Shear vs. butt joint Trapped vapors... 

European Commission Directorate-General for Energy, Directorate D - Nuclear Energy Radiation Protection, Article 35 Technical Report, Institute of Isotopes, Budapest, Hungary, HU-12/01, 6 to 8 March 2012. 

There are a variety of methods to create hermetic seals with ultrasonic welding. The first most common is to create triangular energy directors perpendicular to a main energy director as shown in Figure 12.7a. However, a textured surface can also be used on one surface in conjunction with the triangular energy director on the... 

FIGURE 12.4 Simple energy director butt joint before (a) and after ultrasonic welding (b). 

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