Author(s) :

Ikezue, E. N., Umeuzuegbu, J. C. , Egbosiuba, T. C..

Volume/Issue :

Abstract :

The paper highlights the sources of linear/nonlinear viscoelastic and visco plastic behavior in hibiscus Esculentus fiber reinforced polymer composites materials. The significance of the study is directly related to the very nature of this material composite which tends to indicate a time dependent behavior. The behavior could either be a linear or nonlinear one and this is normally considered in the study of fiber reinforced composites since it is directly related to strain rate effects, micro damage induced to the structure of the composite and or irreversible plastic strain. The micro damage is due to the application of high stresses or strain and such high stress levels result in an irreversible phenomenon such as viscoelasticity and viscoplasticity and viscoplastic responses and the process parameters involved were identified. The results show that the viscoplastic strain increases exponentially fig 1 and 2 and attains asymptotic limit of 0.18% for 65MPa (fig 1a) and 0.26% for 70 MPa (fig 1b)

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