X-ray computed tomography is capable of measuring non-destructively the fiber geometrical characteristics that deeply affect both physical and mechanical properties of fiber-reinforced polymeric products. In particular, X-ray computed tomography can overcome the limitations of conventional methods used for fiber orientation analysis and fiber length measurement, which are mainly based on time-consuming and destructive optical analyses. This work especially addresses the case of fiber length measurement, which is particularly complex because – differently from the case of fiber orientation and concentration analyses – it needs the individual fibers to be identified and segmented. Moreover, the accuracy of such measurements has not been thoroughly investigated so far. In this work, a new method for accuracy evaluation is proposed. The method is based on the use of a newly developed task-specific reference object, which has been designed, manufactured and calibrated with respect to the length of a selection of fibers with different lengths and different configurations.

Accuracy of fiber length measurements using X-ray computed tomography for the analysis of composite materials

Zanini F.;Carmignato S.
2019

Abstract

X-ray computed tomography is capable of measuring non-destructively the fiber geometrical characteristics that deeply affect both physical and mechanical properties of fiber-reinforced polymeric products. In particular, X-ray computed tomography can overcome the limitations of conventional methods used for fiber orientation analysis and fiber length measurement, which are mainly based on time-consuming and destructive optical analyses. This work especially addresses the case of fiber length measurement, which is particularly complex because – differently from the case of fiber orientation and concentration analyses – it needs the individual fibers to be identified and segmented. Moreover, the accuracy of such measurements has not been thoroughly investigated so far. In this work, a new method for accuracy evaluation is proposed. The method is based on the use of a newly developed task-specific reference object, which has been designed, manufactured and calibrated with respect to the length of a selection of fibers with different lengths and different configurations.
2019
European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019
19th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2019
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3317087
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