Abstract
The flexural strength and bending behavior of CFRP and GFRP thin composite beams were investigated numerically and experimentally, for a total of 33 beams with various geometries. The experimental measurements were included a 3-point bending test machine, displacement sensor, and digital image processing (DIP). Among these three experimental methods, just the DIP method, yielding a continuous measurement for the amount of the deformation as well as its rate and through the whole two-dimensional displacement field. Also, the experimental results showed that DIP is an accurate method for monitoring full/local deflection, through-thickness deflection, bending slope, and the stress evolution during the bending tests. Meanwhile, the finite element simulation (FE) was performed to simulate the given experimental tests. The vertical displacement in most of the points in the central region of the beams in the DIP method has an absolute difference of less than 5% in comparison with the experimental and FE results.
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