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Statistical fatigue of unnotched composite laminatesA general analytical, phenomenological model is developed for characterizing fatigue damage accumulation in unnotched composite laminates, and experimental results are used to evaluate the model. The fatigue model, which is developed for various types of cyclic loadings, is based on the assumption that the residual strength reduction is a monotonically decreasing function of the fatigue life. Parameters are determined from baseline test data consisting of one set of residual strength data, one set of static strength data, and one set of constant amplitude fatigue life data. Once the parameters are determined, the model is able to predict: (1) the statistical distribution of the fatigue life, and the residual strength under constant and variable amplitude loads, and (2) the effect of periodic proof tests, without any additional experimental data. Experimental test results show that predictions made from the present model agree quite well with the experimental results. The model is also applicable to fatigue of bonded or bolted composite joints.
Document ID
19810056128
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Yang, J. N.
(George Washington Univ. Washington, DC, United States)
Jones, D. L.
(George Washington University Washington, DC, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Structural Mechanics
Meeting Information
Meeting: International Conference on Composite Materials
Location: Paris
Country: France
Start Date: August 26, 1980
End Date: August 29, 1980
Accession Number
81A40532
Funding Number(s)
CONTRACT_GRANT: NSG-1604
Distribution Limits
Public
Copyright
Other

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