The influence of environmental temperatures on the fatigue strength of compressed-hydrogen tanks for vehicles was investigated. The fatigue strength of type-3 tanks was found to decrease in a low-temperature environment and increase in a high-temperature environment. The type-3 tank has been subjected to autofrettage to improve fatigue strength. The investigation clarified that the effect of autofrettage changes according to the environmental temperature due to the difference between the coefficients of thermal expansion of carbon fiber reinforced plastic and aluminum alloy. This causes fatigue strength to change with changes in temperature. The type-4 tank has a very long fatigue life and did not break after 45000 cycles in a room-temperature or low-temperature environment. In a high-temperature environment, however, the tank broke in fewer than 45000 cycles. The fatigue of carbon fiber reinforced plastic was promoted in the high-temperature environment, resulting in breakage of the tank. These results indicate that the fatigue strength of the tanks is influenced by the environmental temperature.


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    Title :

    Influence of temperature on the fatigue strength of compressed-hydrogen tanks for vehicles


    Additional title:

    Einfluß der Temperatur auf die Dauerfestigkeit eines Wasserstoffdrucktanks für Fahrzeuge


    Contributors:


    Publication date :

    2011


    Size :

    7 Seiten




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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