Strain sensing in GFRP via fully integrated carbon nanotube epoxy film sensors

Buggisch, Christina; Gibhardt, Dennis; Felmet, Nils; Tetzner, Yannick; Fiedler, Bodo

doi:10.1016/j.jcomc.2021.100191

“…In parallel, means for Structural Health Monitoring (SHM) of those structures were subject of a large number of researches. Among others, this includes damage monitoring using ultrasonic guided waves, strain and electrical measurements [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

On the characterisation of cohesive interfaces by the mode I strain energy release ratio

Linke¹,

Lammering²

2022

Preprint

1

2

0

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For the evaluation of the double cantilever beam (DCB) test several approaches are applicable that can provide different results. This ambiguity can significantly affect numerical models which refer to experimentally obtained material parameters. In this work, different approaches for the test evaluation are presented. It is shown that equations derived from the beam theory give reasonable results and good agreement between experiments, numerical and analytical solutions. In this context, DCB tests of glass fibre reinforced polymer substrates with carbon nanotube enriched composites are conducted. A slight negative effect of the latter on the experimental results is found.

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“…In parallel, means for Structural Health Monitoring (SHM) of those structures were subject of a large number of researches. Among others, this includes damage monitoring using ultrasonic guided waves, strain and electrical measurements [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

On the characterisation of cohesive interfaces by the mode I strain energy release ratio

Linke

¹

,

Lammering

²

2023

Proc Appl Math and Mech

0

View full text Add to dashboard Cite

For the evaluation of the double cantilever beam (DCB) test several approaches are applicable that can provide different results. This ambiguity can significantly affect numerical models which refer to experimentally obtained material parameters. In this work, different approaches for the test evaluation are presented. It is shown that equations derived from the beam theory give reasonable results and good agreement between experiments, numerical and analytical solutions. In this context, DCB tests of glass fibre reinforced polymer substrates with carbon nanotube enriched composites are conducted. A slight negative effect of the latter on the experimental results is found.

show abstract

“…Thus, their effect on the structural integrity has to be investigated since their cohesive properties may deviate. 13,14,15,16,17 Maintaining the initial fracture behavior of the affected interface is a key factor for an optimized sensor design.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the effect of local cohesive property variation to single mode fracture models

Linke¹,

Lammering²

2022

Preprint

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In this work, the effect of local cohesive property variation on the fracture behavior of single mode fracture models is numerically investigated. In this context, 3D models for the double cantilever beam test and the end-notched flexure test are built. The bonded interface is considered in two variants: a) homogeneous and b) heterogeneous with a local patch of varying cohesive properties. In order to evaluate the effect of the patch to the fracture behavior, the cumulative damage is introduced as a criterion. Parameters of the patch, i.e. material properties, geometry and position, are varied in a parametric study. Conclusions about their effect on the cumulative damage are drawn and justified. Different conditions of the crack growth are considered, i.e. crack onset and propagation. The results of the study outline the importance of the geometrical design of the patch. Especially the orientation of non-squared patches has a large, disproportional effect on the cumulative damage. Also the fracture mode plays an important role. The obtained information can be used to optimize interlaminar integrated sensors as a mean of structural health monitoring.

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Strain sensing in GFRP via fully integrated carbon nanotube epoxy film sensors

Cited by 4 publications

References 36 publications

On the characterisation of cohesive interfaces by the mode I strain energy release ratio

On the characterisation of cohesive interfaces by the mode I strain energy release ratio

On the characterisation of cohesive interfaces by the mode I strain energy release ratio

A numerical study on the effect of local cohesive property variation to single mode fracture models

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