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  • 1
    Electronic Resource
    Electronic Resource
    A Study on Procedures of the Accelerated Life Testing for Hose Assemblies (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 1870-1875 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: There are several types of life test method for hose assemblies. The two major tests used for hose assemblies are impulse test and burst test. And magnification adjustment of impulse pressure, heating of testing oil and repetitive motions of bending and straightening of testing hose are also performed for accelerating the life. According to the manufacture process of hose and swaging process of fitting, there is a difference in the life of hose assemblies from minimum 7 times to maximum 40 times during the life test in the same functioning condition. Like this, the life test ofhose which has a wide scope of life distribution gives a problem that observation should take a long time to find out the existence of the bursting from the beginning of the test to the completion of bursting of hose assemblies. Therefore, this research proposes a process of concentrating on the defective section of hose assemblies and maximizing the life acceleration by giving ‘Knockdown stress’ to hose assemblies just until before the hose assemblies get out of order
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.1870.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reliability and Lifetime of Mechanical Units in Operation and Test (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 549-552 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The paper discusses the problem of reliability calculation for mechanical units underload. Because the rated reliability of the unit as a system with many independent elements can tendto zero, the methods of reliability calculation of the units as real objects with the common factors(loads, operation conditions) are proposed. The choice of the life test modes and test time dependsessentially on unit-related information like their operation conditions. The paper describes one ofapproaches, passing to this problem. Within its framework, the accumulations of damages are madeat several typical points of the loaded system
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.549.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Impact Energy Measurement of a Hydraulic Breaker (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1669-1672 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A hydraulic breaker for construction machinery generally used for the destroying anddisassembling of buildings, crashing road pavement, breaking rocks at quarry and so on. So themeasurement of the impact energy of a hydraulic breaker is very important thing to prove itscapability to manufacturers and customers. In this study, the test system for measuring the impactenergy of a hydraulic breaker was designed and constructed. The test system was consisted withhydraulic cylinders for mounting a breaker, impact absorbing base and frames, pressure and flowsensors, high speed and accurate data acquisition system [removed info] diesel engine driven hydraulic powerunit. The test process of the developed system was carried by measuring guide for tool energy ratingfor hydraulic breakers which was developed by the CIMA (Construction Industry ManufacturersAssociation) USA. The developed test system can be applied to measure the impact energy forvarious kinds of hydraulic breakers
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1669.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Development of Accelerated Life Test Method of Hydraulic Pump (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1861-1864 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper proposes a new accelerated life test method of hydraulic pump used invehicles, which have multiple alternating loads. For determination of life time of hydraulic pumpfor given field conditions with respect to duty cycle, the equivalent load and speed of this unit hasto be determined. Equivalent load and speed can be calculated from the given duty cycle using thepredominant theory for cumulative fatigue damage. Finally, we can perform accelerated life test onhydraulic pump by determination of test pressure and speed from calculated equivalent cumulativedamage per working cycle and weighted average speed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1861.pdf
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Accelerated Life Testing Method of Transmission (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1865-1868 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this study, we proposed a process of an accelerated life testing method of 5-speedmanual transmissions used in vehicles, which loads are consisted of multiple alternating loads. Theentire process of an 5-speed manual transmission’s accelerated life testing method where no failuresare allowed, is a process that requires an abundance of assumptions, and other factors that areestimates such as the shape parameter, beta([removed info]) and the fatigue damage exponent (x). And theprocess is consisted of 7-step process. From the 1-setp, which is the deriving the service(use) torqueand speed(rpm) profile of the transmission, to the 7-step, we could determine the accelerated lifetime, the accelerated torque and the accelerated speed(rpm), which are the equivalent cumulativefatigue damage. Also, we have performed accelerated life test on 5-speed manual transmission byusing the following 7-step process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1865.pdf
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    Paper (German National Licenses)
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