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Computational simulation of the creep-rupture process in filamentary composite materialsA computational simulation of the internal damage accumulation which causes the creep-rupture phenomenon in filamentary composite materials is developed. The creep-rupture process involves complex interactions between several damage mechanisms. A statistically-based computational simulation using a time-differencing approach is employed to model these progressive interactions. The finite element method is used to calculate the internal stresses. The fibers are modeled as a series of bar elements which are connected transversely by matrix elements. Flaws are distributed randomly throughout the elements in the model. Load is applied, and the properties of the individual elements are updated at the end of each time step as a function of the stress history. The simulation is continued until failure occurs. Several cases, with different initial flaw dispersions, are run to establish a statistical distribution of the time-to-failure. The calculations are performed on a supercomputer. The simulation results compare favorably with the results of creep-rupture experiments conducted at the Lawrence Livermore National Laboratory.
Document ID
19910046612
Document Type
Reprint (Version printed in journal)
Authors
Slattery, Kerry T. (Washington University Saint Louis, MO, United States)
Hackett, Robert M. (Mississippi, University University, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1991
Publication Information
Publication: Journal of Reinforced Plastics and Composites
Volume: 10
ISSN: 0731-6844
Subject Category
COMPOSITE MATERIALS
Funding Number(s)
CONTRACT_GRANT: NGT-50365
CONTRACT_GRANT: NSF RII-89-02064
Distribution Limits
Public
Copyright
Other