Detectability evaluation of eddy current testing probes for inspection of defects in carbon fiber reinforced polymer laminates

This article aims to study the quantitative eddy current testing of structures of carbon fiber reinforced polymer (CFRP) material; numerical schemes for forward and inverse analysis of eddy current testing signals are proposed and validated for eddy current testing of the CFRP material. At first, an efficient forward solver based on the database approach is updated to treat anisotropic eddy current problem for efficient simulation of the eddy current testing signals due to crack in CFRP material, and an inversion scheme based on the conjugate gradient method is developed using the updated fast forward solver for sizing defect in a CFRP plate. Second, a hybrid inverse analysis scheme is proposed and implemented to improve the sizing accuracy of crack in a CFRP plate using eddy current testing signals of high frequency. Third, eddy current testing signals due to artificial cracks in a CFRP plate are measured and adopted to reconstruct the profile of the cracks. A good agreement between the true and the reconstructed defect sizes demonstrated the validity of both the fast forward solver and the new inversion scheme for sizing defects in the CFRP plate from eddy current testing signals.

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Failure mechanisms of cross-ply carbon fiber reinforced polymer laminates under longitudinal compression with experimental and computational analyses

Composites Part B Engineering ◽

10.1016/j.compositesb.2018.12.041 ◽

2019 ◽

Vol 167 ◽

pp. 147-160 ◽

Cited By ~ 11

Author(s):

Qingping Sun ◽

Guowei Zhou ◽

Haiding Guo ◽

Zhaoxu Meng ◽

Zhangxing Chen ◽

...

Keyword(s):

Carbon Fiber ◽

Failure Mechanisms ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Longitudinal Compression ◽

Reinforced Polymer ◽

Carbon Fiber Reinforced ◽

Computational Analyses ◽

Polymer Laminates

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Interaction of Water with Carbon Fiber Reinforced Polymer Laminates under Dynamic Loading Conditions

Journal of Materials Engineering and Performance ◽

10.1007/s11665-019-03915-5 ◽

2019 ◽

Vol 28 (6) ◽

pp. 3220-3227 ◽

Cited By ~ 2

Author(s):

V. Lopresto ◽

A. Langella ◽

I. Papa

Keyword(s):

Carbon Fiber ◽

Dynamic Loading ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Loading Conditions ◽

Fiber Reinforced ◽

Reinforced Polymer ◽

Carbon Fiber Reinforced ◽

Dynamic Loading Conditions ◽

Polymer Laminates

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Analysis of process-induced deformation on the spring-in of carbon fiber-reinforced polymer thin laminates

Journal of Composite Materials ◽

10.1177/0021998319828443 ◽

2019 ◽

Vol 53 (20) ◽

pp. 2901-2907 ◽

Cited By ~ 4

Author(s):

Andrea Corrado ◽

Wilma Polini

Keyword(s):

Carbon Fiber ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Cure Process ◽

Reinforced Polymer ◽

Numerical Tool ◽

Carbon Fiber Reinforced ◽

Polymer Laminates ◽

Flange Angle

The cure process of carbon fiber-reinforced polymer laminates induces residual stress inside the parts that causes geometrical unconformities. The most important unconformity is the spring-in that means the deviation of the flange-to-flange angle from the design angle. The spring-in value depends on some process parameters, such as the lay-up sequence of the plies, as demonstrated in previous works. The aim of this work is to study the dependence of the spring-in on the deviations in the orientation of the plies due to a hand process. A numerical tool was developed and experimentally tested.

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