2D electrical resistance (ER) mapping to Detect damage for carbon fiber reinforced polyamide composites under tensile and flexure loading

2021 ◽  
Vol 201 ◽  
pp. 108480
Author(s):  
Jong-Hyun Kim ◽  
Pyeong-Su Shin ◽  
Dong-Jun Kwon ◽  
Joung-Man Park
Keyword(s):  
Carbon Fiber ◽  
Electrical Resistance ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

Damage detection in carbon fiber–reinforced polymer composite via electrical resistance tomography with Gaussian anisotropic regularization

2018 ◽  
Vol 18 (5-6) ◽  
pp. 1698-1710 ◽  
Author(s):  
Jan Cagáň ◽  
Jaroslav Pelant ◽  
Martin Kyncl ◽  
Martin Kadlec ◽  
Lenka Michalcová
Keyword(s):  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Polymer Composites ◽  
Electrical Resistance ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Carbon Fiber Reinforced

Electrical resistance tomography is a method for sensing the spatial distribution of electrical conductivity. Therefore, this type of tomography is suitable for sensing damages, which affect electrical conductivity. The utilization of resistance tomography for the structural health monitoring of carbon fiber–reinforced polymer composites is questionable owing to its low spatial resolution and the strong anisotropy of carbon fiber–reinforced polymer composites. This article deals with the employment of resistance tomography with regularization based on a Gaussian anisotropic smoothing filter for the detection of cuts. The advantages of the filter are shown through the image reconstruction of rectangular composite specimens with three different laminate stacking sequences. The cuts are implemented by a milled groove. Visual comparison of the images shows a substantial improvement in the shape reconstruction ability. In addition to visual comparison, the image reconstructions are assessed in terms of the reconstruction error and cross-correlation.

Influence of low-velocity impact-induced delamination on electrical resistance in carbon fiber-reinforced composite laminates

2018 ◽  
Vol 52 (25) ◽  
pp. 3461-3470 ◽  
Author(s):  
Robert J Hart ◽  
OI Zhupanska
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Electrical Resistance ◽  
Low Velocity Impact ◽  
Finite Element Models ◽  
Fiber Reinforced ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

In this paper, experiments have been performed and finite element models have been developed for studying the influence of low-velocity impact damage on the four-probe electrical resistance of carbon fiber-reinforced polymer matrix laminates. Sixteen-ply and 32-ply AS4/3501-6 laminates with quasi-isotropic layup were analyzed. Electrical resistance was evaluated using a four-step procedure. First, finite element models were created in Abaqus Finite Element Analysis (FEA) for simulating low-velocity impact using a quasi-static loading approach. Second, matrix rupture in the inside plies was evaluated, and delamination analysis was performed at the corresponding interfaces to determine delamination patterns. Third, four-probe electrical finite element models were developed in Abaqus FEA for specimens before and after impact using the concept of effective conducting thickness and the delamination patterns obtained from the delamination analysis. Effects of the low-velocity impact delamination on four-probe top and oblique electrical resistance were studied. Electrical resistance predictions were compared to the experimental data. Both top and oblique resistance planes were sensitive to presence of delamination with the oblique resistance measurement being more sensitive as compared to the top resistance measurement. In addition, the resistance of the 16-ply specimens was more greatly affected by the delamination compared to the 32-ply specimens. The proposed analysis can be utilized for design of carbon fiber-reinforced polymer matrix composites with optimized damage sensing capabilities.

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