Investigation into stiffness degradation progress in glass/vinylester laminated beams under large deformations

Document Type : Article

Authors

1 Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehr an, Ira

2 Department of Civil Engineering, AmirKabir University of Technology, Tehran, Iran

3 Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

There are many reports indicating that the maximum measured stress in the composite laminated beams under flexural loading appears different from that under tensile loading. The current study compares the results of Hashin failure criteria in the form of stress and strain components for prediction of failure strength in GFRP laminated beams. In the experimental program the composite laminates were tested under tensile and three-point-bending (3PB) loads. Then, it was trying to predict the flexural failure in laminates based on the measured ultimate stresses and strains in the tensile tests. The strain-based failure criteria employed in the FE models could achieve more admissible predictions for maximum load carrying capacity in the laminates compared to the stress-based criteria. Progressive failure analyses showed that due to higher elastic modulus of laminates under bending load, the maximum experienced stress under bending load becomes larger.

Keywords

Main Subjects


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Volume 25, Issue 5 - Serial Number 5
Transactions on Civil Engineering (A)
September and October 2018
Pages 2389-2403
  • Receive Date: 05 October 2015
  • Revise Date: 02 November 2016
  • Accept Date: 06 March 2017