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  • 11
    Electronic Resource
    Electronic Resource
    Automotive Component Fatigue Life Estimation by Frequency Domain Approach (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 1776-1783 
    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: Time domain approach with S-N approach and local strain approach were used forfatigue life estimation. But these days, using PSD (Power Spectral Density) method is highlighted, because of short amount of time in measurement and analysis. Especially, PSD method is useful for analysis of fatigue failure which is caused by vibration damage, also FRF (Frequency Response Function) is useful for efficient prediction of fatigue life when the same product is employingdifferent motor vehicle or test condition. In order to estimate fatigue life of compressor for air conditioning, time domain analysis and frequency domain analysis were performed and the results were compared. As a result, results of analysis in frequency domain and time domain were similar. With this, there is recognition of decreasing the period of measuring and analysis in PSD analysis.Moreover, in case of FRF pursued of a part, using FRF is applicable at fatigue life prediction in different testing condition. There was investigated an analysis method with curtailed analysis period by FRF
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.1776.pdf
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  • 12
    Electronic Resource
    Electronic Resource
    Dynamic Fracture Analysis of Aluminum Honeycomb Sandwich Panel (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 306-308 (Mar. 2006), p. 67-72 
    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: Impact behaviors of Aluminum Honeycombs Sandwich Panel (AHSP) by drop weight test were investigated in this study. Two types of specimens with l/2" and l/4" cell size were tested by two impactors with the weight of 5.25kgf and 11.9kgf respectively. Transient, contact and elastic-plastic analyses were performed by finite element method. Impact behavior of AHSP about impact sites appeared nearly the same in low impact energy, but it was different in high impact energy. Face was the strongest about impact and short-edge was the weakest. The damaged area of AHSP was enlarged with the increase of impactor weight that is corresponding to impact energy. After 3-point bending test, fracture modes of AHSP were analyzed with AE counts, lower face sheet was fractured in the long-edge direction first, and then separation between face sheet and core happened. In the short-edge directionafter core wrinkled, lower face sheet was torn, impact behavior by FE analysis were increased localized damage in high velocity because the faster velocity of the impact was, the smaller the stress of core was. Consequently, impactor weight had an effect on widely damaged area, while the impact velocity gave rise to localized damaged area
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.306-308.67.pdf
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    Paper (German National Licenses)
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  • 13
    Electronic Resource
    Electronic Resource
    Fatigue Life Evaluation of Bolt Having Tightening Torque under Random Loading (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 819-822 
    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 fatigue life of hexagon head and socket head bolts, attached to vehicle a wheel, isassessed and the estimation of the residual life of existing bolts in vehicle wheel is investigated. Fieldmeasuredload histories were applied in this test. Tensile tests and fatigue tests were performed toevaluate the effect of tightening torque and to obtain the basic experimental data. Miner’s rule wasused to predict the fatigue life of bolts. The results indicate the prediction of fatigue life of the boltswas in good agreement with the real life of vehicle wheel bolts in this test
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.819.pdf
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  • 14
    Electronic Resource
    Electronic Resource
    Development of Web-Based Fatigue Analysis System for Machine Components and Structures (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 1265-1268 
    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 fatigue analysis program to calculate fatigue lives of mechanical components andstructures from FE(Finite Element) results is developed. The useful characteristic of this program isoperated under Web environment. So, any designer who design fatigue strength of components andstructures can use without other program installation. For the assessment of multi-axial fatiguedamage, signed equivalent stress method and critical plane approach have been employed. Eachmethod is compared and the results of Signed von Mises stress method has similar to the results ofSmith-Waston-Topper's parameter using critical plane approach. The results were compared withthose from commercial program FE-Fatigue6.0 and it was observed that fatigue life and cumulativedamage distribution calculated applying same fatigue resistance curve. The results of calculatedfatigue life using Web based program agree well with those from FE-Fatigue6.0
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.1265.pdf
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  • 15
    Electronic Resource
    Electronic Resource
    A Study on Load Analysis and Durability Test Condition of Automobile Brake Pedal (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 1273-1276 
    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: Automobile pedal which is loaded by driver’s input is transmitting load to throttle cable,braking device and clutch device and controlling automobile. Measuring working condition andapplying equivalent damage are needed for reliability of developing pedal. The measuring workingcondition is requiring more investigation with various respects because of widely ranged drivers, roadcondition and environmental condition. Additionally, when equivalent damage is applied, there arenot suitable for test condition if equivalent damage is too high level to apply or unused region. In thisstudy, load history is measured with 95percentile customer. Measured load history is converted tostress history about critical area of pedal by FEM. There are drawn up histogram of pedal cycles andload from stress history with rain flow cycle counting method, calculated relative damage of extendedstress history with Palmgren-Miner rule. From the results, calculated total relative damage is appliedto calculation method of test time and load. Calculation method for test condition is carried out withthree methods which are enforcing with total stress by rain flow cycle counting, representative loadand blocked load. Accelerated durability test condition of pedal using with relative damage andacceleration factors are proposed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.1273.pdf
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