Micromechanics-based analysis on tensile behavior of the sprayed FRP composites with chopped glass fibers

BJ Yang, SK Ha, HK Lee - Journal of the Computational Structural …, 2012 - koreascience.kr
BJ Yang, SK Ha, HK Lee
Journal of the Computational Structural Engineering Institute of Korea, 2012koreascience.kr
In this paper, experimental tests and theoretical studies were carried out to evaluate the
tensile behavior of the sprayed FRP composite with chopped glass fiber. For this, a series of
tensile strength tests with various strain rates were conducted on the specimens of the matrix
and sprayed FRP composite. Sprayed FRP composite contained chopped glass fibers with
fiber length of 15mm and a specific volume fraction of fibers of 25%. An inverse simulation
was conducted to simulate the strain rate sensitivity based on the present experimental data …
Abstract
In this paper, experimental tests and theoretical studies were carried out to evaluate the tensile behavior of the sprayed FRP composite with chopped glass fiber. For this, a series of tensile strength tests with various strain rates were conducted on the specimens of the matrix and sprayed FRP composite. Sprayed FRP composite contained chopped glass fibers with fiber length of 15mm and a specific volume fraction of fibers of 25%. An inverse simulation was conducted to simulate the strain rate sensitivity based on the present experimental data of the epoxy resin. The simulated viscosity value is adapted to the micromechanics-based viscoelastic damage model (Yang et al., 2012), and the overall tensile behavior of sprayed FRP composites is predicted. It was seen from the comparative study between present experimental data and predication results that the proposed methodology can be used to predict the viscoelastic behavior of the sprayed FRP composite.
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