This paper investigates the reliability-based design of composite laminates for hydrogen tanks at cryogenic environments. Large residual strains developed due to thermal mismatch between matrix and fibers result in matrix cracking at cryogenic temperatures and increased hydrogen leakage through the tank wall. First, the effects of temperature dependent material properties, allowing partial ply failure (matrix cracking), and reduced axial loads on tank wall achieved by auxiliary stiffening mechanisms are investigated by deterministic designs. Reliability-based optimizations are performed to quantify the effect of the uncertainties in composite material properties on the optimum thickness. The paper explores effects of uncertainties in different parameters to identify those that have the largest influence on the optimum design and quantify the weight penalty associated with level of uncertainty in those parameters. Studies of weight and reliability tradeoffs indicate that the most cost-effective measure of reducing thickness may be quality control.


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    Title :

    Reliability, weight, and cost tradeoffs in the design of composite laminates for cryogenic environments


    Contributors:
    Qu, X. (author) / Venkataraman, S. (author) / Haftka, R.T. (author) / Johnson, T.F. (author)


    Publication date :

    2001


    Size :

    15 Seiten, 18 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Reliability, weight, and cost tradeoffs in the design of composite laminates for cryogenic environments

    Qu, Xueyong / Venkataraman, Satchi / Haftka, Raphael et al. | AIAA | 2001


    AIAA-2001-1327 Reliability, Weight, and Cost Tradeoffs in the Design of Composite Laminates for Cryogenic Environments

    Qu, X. / Venkataraman, S. / Haftka, R. et al. | British Library Conference Proceedings | 2001


    Deterministic and Reliability-Based Optimization of Composite Laminates for Cryogenic Environments

    Xueyong Qu / Raphael T. Haftka / Satchi Venkataraman et al. | AIAA | 2003


    Deterministic and reliability-based optimization of composite laminates for cryogenic environments

    Qu, Xueyong / Venkatararaman, Satchi / Haftka, Raphael et al. | AIAA | 2000


    Deterministic and Reliability-based Optimization of Composite Laminates for Cryogenic Environments

    Qu, X. / Venkataraman, S. / Haftka, R. T. et al. | British Library Conference Proceedings | 2000