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http://dx.doi.org/10.5139/JKSAS.2014.42.11.927

Strength Prediction on Composite Laminates Including Material Nonlinearity and Continuum Damage Mechanics  

Park, Kook-Jin (Seoul National University)
Kang, Hee-Jin (Seoul National University)
Shin, Sangjoon (Seoul National University)
Choi, Ik-Hyun (Korea Aerospace Research Institute)
Kim, Minki (Korea Aerospace Research Institute)
Kim, Seung-Jo (Seoul National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.42, no.11, 2014 , pp. 927-936 More about this Journal
Abstract
This paper presents development and verification of the progressive failure analysis upon the composite laminates. Strength and stiffness of the fiber-reinforced composite are analyzed by property degradation approach with emphasis on the material nonlinearity and continuum damage mechanics (CDM). Longitudinal and transverse tensile modes derived from Hashin's failure criterion are used to predict the thresholds for damage initiation and growth. The modified Newton-Raphson iterative procedure is implemented for determining nonlinear elastic and viscoelastic constitutive relations. Laminar properties of the composite are obtained by experiments. Prediction on the un-notched tensile (UNT) specimen is performed under the laminate level. Stress-strain curves and strength results are compared with the experimental measurement. It is concluded that the present nonlinear CDM approach is capable of predicting the strength and stiffness more accurately than the corresponding linear CDM one does.
Keywords
laminated composite; progressive failure analysis; material property degradation method; continuum damage mechanics;
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Times Cited By KSCI : 2  (Citation Analysis)
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