Paper Title:
Assessment of Fiber Stress Based on Elastoplastic Analysis in Discontinuous Composite Materials
  Abstract

An elastopalstic analysis of the micromechanical approach is performed to investigate the stress transfer mechanism in a short fiber reinforced composites. The model is based on the New Shear Lag Theory (NSLT) which was developed by considering the stress concentration effects that exist in the matrix region near fiber ends. The unit cell model is selected as the Representative Volume Element (RVE) for the investigation of longitudinal elastoplastic behavior in discontinuous composites. Thus far, it is focused on the detailed description to predict fiber stresses in case of the behavior of elastoplastic matrix as well as elastic matrix. Slip mechanisms between fiber and matrix which normally take place at the interface are considered for the accurate prediction of fiber stresses. Consequently, onset of Slip points is determined analytically and it showed a moving direction to the fiber center region from the fiber tip as the applied load increases. It is found that the proposed model gives the more reasonable prediction compared with the results of the conventional model (SLT).

  Info
Periodical
Key Engineering Materials (Volumes 306-308)
Edited by
Ichsan Setya Putra and Djoko Suharto
Pages
829-834
DOI
10.4028/www.scientific.net/KEM.306-308.829
Citation
H. G. Kim, "Assessment of Fiber Stress Based on Elastoplastic Analysis in Discontinuous Composite Materials", Key Engineering Materials, Vols. 306-308, pp. 829-834, 2006
Online since
March 2006
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Price
$32.00
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