Evaluation of fiber content in GFRP bars using digital image processing
Evaluation of fiber content in GFRP bars using digital image processing
复制标题
使用数字图像处理评估 GFRP 棒中的纤维含量
DOI:
10.1016/j.compositesb.2020.108307
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
Nanni, Antonio
中科院分区:
文献类型:
--
作者:
Morales, Carlos N.;Claure, Guillermo;Álvarez, Jorge;Nanni, Antonio
The tensile strength and elastic modulus of a fiber reinforced polymer (FRP) bar are directly related to the percentage of fibers measured by weight or volume. Recognizing the increasing number of different commercially available FRP bars, the implementation of precise methods for quantification of constituent fractions is of high importance to determine physico-mechanical properties. In this study, the fiber and resin matrix contents of four commercially available glass FRP (GFRP) bars were evaluated by implementing micrograph analysis of representative cross-sectioned specimens and compared to a conventional resin matrix separation method. The micrograph analysis was performed through digital image processing (DIP) of scanning electron microscope (SEM) images, while the conventional method was achieved by applying the standardized burn-off resin technique (ASTM D2584-18). The fiber volume fractions obtained from the DIP method were converted to weight fraction through constituent relationship equations. Comparable weight fraction values were obtained from both methods. However, the DIP method has the capability to provide additional microstructural information.
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