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Steel and Composite Structures
  Volume 7, Number 5, October 2007 , pages 355-376

Viscoelastic behavior on composite beam using nonlinear creep model
Sung-Yeop Jung, Nam-Il Kim and Dong Ku Shin

    The purpose of this study is to predict and investigate the time-dependent creep behavior of composite materials. For this, firstly the evaluation method for the modulus of elasticity of whole fiber and matrix is presented from the limited information on fiber volume fraction using the singular value decomposition method. Then, the effects of fiber volume fraction on modulus of elasticity of GFRP are verified. Also, as a creep model, the nonlinear curve fitting method based on the Marquardt algorithm is proposed. Using the existing Findley
Key Words
    composite beam; creep; fiber volume fraction; curve fitting method; Marquardt algorithm.
Sung-Yeop Jung; Pyunghwa Institute of Construction Technology, 1474-21, Kwanyang-2-Dong, Dongan-Gu, Anyang City, Kyonggi-Do, 431-810, Korea
Nam-Il Kim and Dong Ku Shin; Department of Civil and Environmental Engineering, Myongji University,
San 38-2, Nam-Dong, Yongin City, Kyonggi-Do, 449-728, Korea

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