E-Mail Newsletter

             Issued by the Asian TOP Panel, April 2009

           The Chinese Mechanical Engineering Society (CMES)
           The Institution of Engineers, Indonesia (PII)
           The Japan Society of Mechanical Engineers (JSME)
           The Korean Society of Mechanical Engineers (KSME)


    According to the agreement made in the 2nd Asian TOP Panel Meeting,
the ENGINEERING NEWS IN BRIEF (E-mail newsletter) has now been edited
by the JSME for the year 2009.



1)  Cryogenic Cavitation Tunnel in JAXA (Source: JSME)
2)  Amplified Piezoelectric Actuator Based on Honeycomb-Link-Mechanism
    (Source: JSME)

3)  Analysis of Future Energy System in Japan using MARKAL (Source: JSME)
4)  Research Project on Enhancement of Thermoelectric of Nanostructured Oxide      Materials (Source: JSME)
5)  The Projection of World Heritage Site -The Support System for Removing the      Snow on Shiretoko Crossroad- (Source: JSME)
6)  The development of New Human-Symbiotic Robot gEMIEW2h (Source: JSME)
7)  Heat Transfer Analysis during a Curing Process for UV Nanoimprint Lithography      (Source: KSME)
8)  Study of Impact Energy Propagation Phenomenon and Modal Characteristics of an      Armored Vehicle Undergoing High Velocity Impact(Source: KSME)
9)  Investigation and Design of a New Shock Absorbing Device that Cooperates      between Two Colliding Objects(Source: KSME)
10) Analysis of Weld-induced Residual Stresses and Distortions in Thin-walled      Cylinders (Source: KSME)
11) Design and Experimental Study on Low-specific Centrifugal Fire Pumps
(Source: CMES)
12) A New Type Frictional Transducer (Source: CMES)
13) Research and Development of CAI System Based on Standard Solutions
     (Source: CMES)


1) Cryogenic Cavitation Tunnel in JAXA

     Kazuki Niiyama, Yoshiki Yoshida, The Japan Aerospace Exploration Agency     (JAXA)

 A thermodynamic effect in cavitation makes a growth of cavity bubble delayed in cryogenic fluids, and results in improving suction performances and suppressing the cavitation instabilities in rocket turbopump inducers. Thus, quantitative estimations of the thermodynamic effect in cavitation should be important for the further improvement of inducers. New cryogenic cavitation tunnel was constructed at the Kakuda Space Center in the Japan Aerospace Exploration Agency for a quantitative elucidation on the thermodynamic effect in cavitation.
 Measurements of the temperature depression in cavitating flow of an orifice were conducted with liquid nitrogen in this tunnel. The temperature depression increased as the flow velocity decreased if cavitation number equals. This result qualitatively agrees with the theory on the thermodynamic effect with a single bubble.
 Visualizations of cavitating flow are planned and the comparison of the temperature depression with the aspect of cavity will enable the quantitative analysis of the thermodynamic effect in cavitation with bubble clouds.


2) Amplified Piezoelectric Actuator Based on Honeycomb-Link-Mechanism

     Mikio Muraoka, Akita University

 This report introduces long-stroke and nanometer-resolution piezoelectric actuators based on a compact hinge-mechanism of amplifying the displacement, namely honeycomb-link mechanism. The mechanism is realized by using a plate patterned on an eccentric honeycomb. When an actuator applies a longitudinal elongation to each cell in the plate, a relatively large elongation is produced in the perpendicular direction. Because of the periodicity of the structure, it is possible to build up compact amplified-actuators. A prototype XY stage of 84 mm ~ 84 mm ~ 26 mm in size yielded a displacement of about 400 um at a voltage of 150 V for each axis without mutual interference.

3) Analysis of Future Energy System in Japan using MARKAL

Yutaka Tabe, Hokkaido University

 This paper introduces the MARKAL model as one of analysis tools to evaluate the long-term change of energy system in a country, and describes an importance of establishment of engineer network using energy system analysis. The MARKAL model is composed of energy resources, energy supply technologies, energy ultimate demand technologies and energy service demands, and these are connected by energy carriers. The outline of the model and some examples of parameter sets are explained. An analysis example, a study on the evolution of energy demand and supply toward the year 2050 and on the potential benefits of nuclear energy utilization in Japan, is also presented. In the energy system analysis, appropriate modeling of the energy technologies and setting of parameters of each technology and each demand are extremely important. Therefore, the engineer network using the energy system is significantly effective to develop the energy system model.

4) Research Project on Enhancement of Thermoelectric of Nanostructured     Oxide Materials

Koji Miyazaki, Kyushu Institute of Technology

 We would like to introduce a research collaboration project with industries and universities on enhancement of thermoelectric performance of nanostructured oxide materials in Fukuoka area.  Thermoelectricity is one of important technologies for energy harvesting from waste heat, because the huge amount of thermal energy at low temperature is unutilized for electric power generation due to its difficulties.  The intrinsic low thermoelectric performance of the materials is critical issue for practical use of thermoelectricity.  In this project we are trying to improve the thermoelectric performance of oxide materials by using nanotechnology.  We made a calcium cobaltite for p-type, and aluminum doped zinc oxide for n-type as thermoelectric oxides.  The low thermal conductivity, high electrical conductivity and high Seebeck coefficient are necessary for the enhancement of thermoelectric performance.  We have reduced thermal conductivities of oxide materials with the bulk Seebeck coefficients by making nano-porous materials at the present stage.  We must keep the high electrical conductivity of the nano-porous oxides as the future work in this project._________________________________________________________________________________________________________________________________

5) The Projection of World Heritage Site -The Support System for Removing the     Snow on Shiretoko Crossroad-

    Soichiro Suzuki, Kitami Institute of Technology

 In July 2005, the Shiretoko peninsula was registered on UNESCOfs World Heritage list. The snow on Shiretoko crossroad has to be removed until eGolden weekf holidays for tourist. The snow removing work using a backhoe is very dangerous because of the heavy snow. We developed the support system of the snow removing work for the safety of the operator of the backhoe. This system can display the 3D virtual landscape under the snow by using a RTK-GPS. This system will be put to practical use in the near future.


6) The development of New Human-Symbiotic Robot gEMIEW2h

Masashi Koga, Hitachi, Ltd.

 Hitachi developed a new human-symbiotic robot named gEMIEW2h. Its prospected task is ushering and surveillance in office buildings. It can run as fast as 6km/h, which the task requires. To ensure the intrinsic safety, it is designed to weigh no more than 13kg so that it doesnft hurt people in case it collides or falls. Three futuristic technologies are applied; (1) Transformable leg-wheel mechanism that enables fast-mobility by two-wheel configuration and stability by four-wheel configuration, (2) Intelligent navigation that localize the robot by matching the distribution of depth obtained by the laser-range scanner and a preloaded map, (3) Voice communication by high-fidelity voice synthesis and noise-resistant voice recognition with a newly developed gdirection of arrival estimationh technology using the fourteen microphones mounted on EMIEW2fs head.

7) Heat Transfer Analysis during a Curing Process for UV Nanoimprint     Lithography

    Insoo Park, Si-Hyung Lim, Donghoon Shin, Kee Sung Lee, Siyoul Jang,
    Hong Jae
Yim, Chongjin Won and Jay I. Jeong,
     School of Mechanical and Automotive Engineering, Kookmin University

Abstract : A heat transfer analysis during the curing process in UV-Nanoimprint lithography was carried out. To imprint nano/micro patterns into a large-area target glass such as LCD panels, a mold with a poly-urethane-acrylate layer is often used, on which layer the micro/nano patterns are inscribed for the UV-NIL process. After UV resin is coated between the target glass and the flexible mold, the UV resin is cured by exposing UV light on the resin. In the curing process, heat from the phase change of the resin and the radiation by UV lamp would induce a temperature change and thermal distortion of the mold. In this study, we measured the temperature change of the flexible mold, and established an analytic model of the heat transfer. From the result, we derived the thermal properties of the PUA layer, and a thermal resistance layer between the PUA and the cured resin layer.Keyword : Nanoimprint; Mold; UV Resin; Thermal change(The Journal of Mechanical Science and Technology, vol. 23, no. 4, pp.927-930, 2009)

8) Study of Impact Energy Propagation Phenomenon and Modal Characteristics     of an Armored Vehicle Undergoing High Velocity Impact

    Man Hoi Koo1, Hong Seok Lim2, Hak In Gimm1 and Hong Hee Yoo2,*
     1. Agency for Defense Development,
    2. School of Mechanical Engineering, Hanyang University,

Abstract : A new manufacturing technology is being employed to build a new type of armored vehicle. While thick panels are welded together in the old manufacturing technology, relatively thin panels are welded to a frame structure in the new manufacturing technology. The structural integrity of the new type of armor vehicles can be maintained mainly by the frame structures while the panel thickness is reduced significantly to reduce the total vehicle weight. Since the dynamic characteristics of a frame-panel hybrid structure are different from those of the old type of structure which consists of only thick panels, they should be identified to achieve a good performance of the vehicle. For this purpose, a proper FE model of the hybrid type of structure needs to be developed. In the present study, FE models are proposed to represent the frame-panel hybrid type structure efficiently. The impact energy propagation, the transient response and the modal characteristics are investigated with the FE models.
Keyword : Armored vehicle; Impact analysis; Impact energy propagation; Topology optimization (The Journal of Mechanical Science and Technology, vol. 23, no. 4, pp.964-967, 2009)

9) Investigation and Design of a New Shock Absorbing Device that     Cooperates between Two Colliding Objects

Atsushi Kawaguchi1,*, Kai Sedlaczek2, Atsushi Kawamoto1 and Peter     Eberhard2
     1.Toyota Central R&D Labs., Inc.,
    2. Institute of Engineering and Computational Mechanics, University of        Stuttgart,

Abstract : This paper deals with a new type of shock absorbing device that cooperates between two colliding objects. The new device utilizes a four-bar-chain-like articulated mechanism with some possible actuations. The devices are assumed to be deployed in the pre-crash phase (by sensing and identifying unavoidable collisions) so as to provide an extended deformable region between the two objects. Moreover, by functioning like a four-bar-chain mechanism, they produce a repulsive effect by pushing each other and sliding in the opposite lateral direction. To investigate the capacity of the proposed articulated shock absorbing mechanism, a standard numerical optimization technique called SQP and a new optimization technique called ALPSO are applied. ALPSO is an attractive method for solving multimodal optimization problems based on Particle Swarm Optimization and constraint treatment using an Augmented Lagrange Method. We demonstrate ALPSO and show its applicability to this problem. The optimization process automatically determines the mode of the operation and gives an estimation of the development potential of the new device.
Keyword : Active safety; Investigation and design; Multibody dynamics; Optimization (The Journal of Mechanical Science and Technology, vol. 23, no. 4, pp.1040-1045, 2009)

10) Analysis of Weld-induced Residual Stresses and Distortions in Thin-walled      Cylinders

     Naeem Ullah Dar1, Ejaz M. Qureshi2,* and M.M.I Hammouda1

1. Department of Mechanical Engineering, University of Engineering & Technology,;
2. Department of Mechanical Engineering, College of Electrical Engineering, National University of Sciences & Technology,

Abstract : Circumferential weld specifically in thin-walled structures is a common joint type in the fabrication of structural members in aerospace, aeronautical and pressure vessel industries. This type of weld joint suffers various types of weld-induced residual stress fields (hoop and axial) and deformation patterns (axial shrinkage, radial shrinkage). These imperfections have negative effects on fabrication accuracies and result in low strength welded structures that can lead to premature failures. To precisely capture the distortions and residual stresses, computational methodology based on three-dimensional finite element model for the simulation of gas tungsten arc welding in thin-walled cylinders is presented. Butt-weld geometry with single "V" for a 300 mm outer diameter cylinder of 3 mm thick is used. The complex phenomenon of arc welding is numerically solved by sequentially coupled transient, non-linear thermo-mechanical analysis. The accuracy of both the thermal and structural models is validated through experiments for temperature distribution, residual stresses and distortion. The simulated result shows close correlation with the experimental measurements.
Keyword : FE; Numerical simulations; Welding simulations; Thermo-mechanical analysis; Residual stresses; Distortions; Thin-walled (The Journal of Mechanical Science and Technology, vol. 23, no. 4, pp.1118-1131, 2009)

11) Design and Experimental Study on Low-specific Centrifugal Fire Pumps

Shi Weidong, Zhang Desheng, Lu Weigang, Gao Weidong
       Jiangsu University

 Low-specific centrifugal fire pump design method was put forward based on the maximum flow design method. Sample fire pump was simulated by FLUENT, the numerical results show, its inner flow is steady, static pressure distributes reasonably, and turbulent kinetic energy is small and uniform. The performance curve of the model pump with high efficiency, which can meet the design requirements, is flat and stable. Throat area of volute and splitters were discussed, the experimental results show that splitters can control axial swirl effectively and increase head, bigger throat area is liable for flat performance curve, and can control axial swirl effectively and increase head, bigger throat area is liable for flat performance curve, and can expand the high-efficiency rang and improve maximum efficiency.
Key words:low-specific-speed; fire pump; numerical simulation; maximum flow design method

12) A New Type Frictional Transducer

Li Renjun, Liu Hongzhao, Wang Zhongmin, Li Pengfei,
       Xifan University of Technology

 A new type frictional transducer was designed by assembling two flexure hinges and two uniform cantilever beams. The influence of friction and reversal clearance which existed in the parts of traditional sensors was avoided, and the continuous measure of friction factor was realized. The expression of interaction between normal force and friction was deduced on theory of structural mechanics. The structure of transducer was optimized if the part sizes of the sensor were given, and therefore the coupling of normal force and friction was eliminated. The flow chart for design the sensor was presented. The results of simulation prove the availability of the sensor.
Key words: frictional transducer; flexure hinge; thrice statically indeterminate structure; decoupling design

13) Research and Development of CAI System Based on Standard Solutions

Yang Bojun, Tian Yumei, Tan Runhua, Majianhong
Hebei University of Technology

The application process and the existing arithmetic of standard solutions in the innovation design were discussed, then the arithmetic and the flow of software that are suitable for the CAI system were constructed. With the support framework of knowledge database, the arithmetic integrated the substance-field (Su-F) analysis tool which was applied to model a technical or process problem with standard solutions tool, implemented to acquire a solution. During the development of CAI software product, static model built based on UML were used to construct the configuration of system, and dynamic models were used to describe the behaviors of system components, then achieved software system analysis. The standard solutions CAI software was coded with VC++ and XML_XSL, which have friendly interfaces and can be used conveniently. Under the help of this software, the component of a roller in the Chinese traditional medicine dropping pill packing is improved.
Key words: standard solution; substance-field analysis; TRIZ; computer-aided innovation (CAI)                                                                   _____________________________________________________________________________________________________________________________

Editor : International Affairs Committee
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