Thomas Gmür
École Polytechnique Fédérale de Lausanne
Atomic force microscopyModal analysisComposite numberSystem identificationEngineeringFinite element methodComposite laminatesComposite materialEpoxyAcoustic emissionMaterials scienceVibrationAcousticsStructural health monitoringShell (structure)Normal modeMathematicsFiber Bragg gratingFracture (geology)CarbonStress–strain curveTransducerStrain gaugeStructural engineeringModalDelaminationNatural frequencyBending
44Publications
17H-index
753Citations
Publications 44
Newest
#1Sandor Kasas (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 25
#2Thomas Gmür (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 17
Last. Giovanni Dietler (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
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The recent development of nanomanipulation tools such as optical tweezers or atomic force microscopes has paved the way to the exploration of the mechanical properties of biological material at the micro- and nanometric scale. The use of these instruments is nowadays generalized, however, the interpretation of the results remains a challenge. It is well known that the deformation of an object under a load depends not only on the mechanical properties of the material but also on its geometry. Thi...
1 CitationsSource
#1Guillaume Frossard (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Joël Cugnoni (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. John Botsis (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 37
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Abstract In this work, the influence of ply thickness on strain energy release rate (ERR) in delamination of carbon-epoxy laminates is addressed. Specimens with three ply thicknesses: 0.030, 0.075 and 0.150 mm are tested. While the ERR at onset of crack propagation is independent of ply thickness, the plateau level is much lower in thin-ply laminates than in thicker ply ones. This effect is attributed to changes in microstructure, caused by the tow spreading process involved in the fabrication o...
31 CitationsSource
#1Enrique GuzmánH-Index: 3
#2Joël CugnoniH-Index: 26
Last. Thomas GmürH-Index: 17
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Aiming to reduce costs, polyvinylidene difluoride (PVDF) film patches are an emerging alternative to more classic piezoelectric technologies, like ceramic patches, as transducers to measure local deformation in many structural applications. This choice is supported by advantages such as the low weight and mechanical flexibility of PVDF, making this polymer suitable for embedding inside full scale polymer based composite structures. Piezoelectric transducer patches can be used as actuators to dyn...
11 CitationsSource
#1Guillaume FrossardH-Index: 3
#2Martin BoesigerH-Index: 1
Last. Ioannis BotsisH-Index: 1
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1 Citations
#1Guillaume FrossardH-Index: 3
#2Joël CugnoniH-Index: 26
Last. Ioannis BotsisH-Index: 1
view all 4 authors...
#1Enrique Guzmán (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Joël Cugnoni (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. Thomas Gmür (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 17
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Among materials being introduced in the aerospace industry, the carbon fibre reinforced plastics (CFRP) have a place of privilege because of their exceptional stiffness-to-mass ratio. However, the polymer-based matrix is vulnerable to damages by environmental conditions. This work exposes the experimental results of several accelerated environmental ageing protocols on CFRP panels. The main concern is to justify or reject by statistical means that a significant degradation of mechanical properti...
13 CitationsSource
#1Guillaume FrossardH-Index: 3
#2Joël CugnoniH-Index: 26
Last. Ioannis BotsisH-Index: 1
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#2Joël CugnoniH-Index: 26
Last. Thomas GmürH-Index: 17
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1 Citations
#1Enrique Guzmán (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Joël Cugnoni (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. A Schorderet ('ENS Paris': École Normale Supérieure)H-Index: 1
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This work validates the use of integrated polyvinylidene fluoride (PVDF) film sensors for dynamic testing, even after being subjected to UV-thermo-hygro-mechanical accelerated ageing conditions. The verification of PVDF sensors' survivability in these environmental conditions, typically confronted by civil and military aircraft, is the main concern of the study. The evaluation of survivability is made by a comparison of dynamic testing results provided by the PVDF patch sensors subjected to an a...
10 CitationsSource
#2Joël CugnoniH-Index: 26
Last. Thomas GmürH-Index: 17
view all 3 authors...