79 Experimental Assessment of Single and Cumulative Impact Damage in Carbon Fiber Polymer Matrix Composites Using Electrical Resistance Measurements

McANDREW, JUSTIN; Zhupanska, Olesya I.

doi:10.12783/issn.2168-4286/2.2/zhupanska

Cited by 5 publications

(9 citation statements)

References 13 publications

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“…The detailed specimen preparation process and attachment of electrodes have been well established in previous studies 8,13,26,27 and will only be summarized briefly in this paper. The first step in preparing the test specimens included lightly sanding the surfaces of the specimen at the desired electrode locations.…”

Section: Methodsmentioning

confidence: 99%

“…The detection and identification of internal damage are further complicated by current spreading. 9 However, in the resistance method, 1,2,10–17 current source and voltage measurement electrodes are placed along a single line, and, thus, resistance of the composite can be calculated using Ohm’s law. The measurement of voltage in line with the current source yields greater sensitivity in identifying damage, compared to the potential method.…”

Section: Introductionmentioning

confidence: 99%

“…The measurement of voltage in line with the current source yields greater sensitivity in identifying damage, compared to the potential method. 9,13…”

Section: Introductionmentioning

confidence: 99%

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The role of electrical anisotropy and effective conducting thickness in understanding and interpreting static resistance measurements in CFRP composite laminates

Hart

Zhupanska

2019

Journal of Composite Materials

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This study is focused on (i) the experimental characterization of the anisotropic electrical resistivity of carbon fiber reinforced polymer (CFRP) composites and (ii) the development and experimental validation of predictive finite element (FE) models of the electrical response in CFRP laminates based on the concept of the effective conducting thickness. Two experimental methods have been developed to characterize the anisotropic electrical resistivities in three principle directions for the CFRP composite laminates using a direct current source. One method utilizes a traditional 6-probe resistance scheme and the alternative point-type 4-probe method is based on a handheld probe device similar to the JIS K7194 standard for homogenous plastics. An extensive experimental study has been conducted to characterize the anisotropic electrical resistivities of 16-ply unidirectional and 16-ply symmetric cross-ply IM7/977-2 and 32-ply unidirectional IM7/977-3 composites using the developed methods. Exploiting the concept of the effective conducting thickness, which describes the effective depth of current penetration through the thickness of an electrically anisotropic material, a unique methodology is developed for constructing FE models of these highly anisotropic CFRP materials. The concept of effective conducting thickness was identified as a critical component in achieving accuracy of the FE results as well as recovery of experimental resistivity from the alternative point-type 4-probe method. The FE models have been validated using the experimental results on the CFRP specimens of varying layup and thickness, and the techniques developed in this work may lead to advancements in non-destructive techniques in the areas of electrical characterization and damage sensing.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The role of electrical anisotropy and effective conducting thickness in understanding and interpreting static resistance measurements in CFRP composite laminates

Hart

Zhupanska

2019

Journal of Composite Materials

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“…In particular, electrical resistance-based methods for damage detection in the CFRP laminates have been proposed and studied. 4–10 The four-probe resistance method 7 is one of the dominant methods. In this method, current source and measurement probes are arranged along a single line enabling calculation of resistance through Ohm’s law.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of BVID, it becomes difficult to guarantee that the internal damage has been fully captured using the resistance method. For instance, McAndrew and Zhupanska 10 studied the influence of a single low-velocity impact on electrical resistance in AS4/3501-6 CFRP laminates with layup arrangements of [0/45/−45/90] 2s and [0/45/−45/90] 4s . Four-probe resistance measurements were observed through the top and oblique measurement planes.…”

Section: Introductionmentioning

confidence: 99%

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

Hart

Zhupanska

2018

Journal of Composite Materials

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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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2017

Carbon Composites

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79 Experimental Assessment of Single and Cumulative Impact Damage in Carbon Fiber Polymer Matrix Composites Using Electrical Resistance Measurements

Cited by 5 publications

References 13 publications

The role of electrical anisotropy and effective conducting thickness in understanding and interpreting static resistance measurements in CFRP composite laminates

The role of electrical anisotropy and effective conducting thickness in understanding and interpreting static resistance measurements in CFRP composite laminates

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

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