The Experts below are selected from a list of 23193 Experts worldwide ranked by ideXlab platform
Laurence Chocinskiarnault - One of the best experts on this subject based on the ideXlab platform.
-
influence of low velocity impact on fatigue behaviour of woven hemp fibre reinforced epoxy composites
Composites Part B-engineering, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence Chocinskiarnault, Fabrizio Sarasini, Monica Francesca Pucci, C Santulli, Jacopo Tirillo, Salvatore Iannace, Luigi SorrentinoAbstract:Abstract The purpose of this work is to study the resistance to low velocity impact of woven hemp/epoxy matrix composites and the influence of impact Damage on their residual quasi-static tensile and cyclic fatigue strengths. Impact characteristic parameters were evaluated and critically compared to those found in the literature for other similar composites. Damage mechanisms were analysed by using AE monitoring and microscopic observations. An analytical model is used to predict the fatigue lifetime of impacted specimens. Moreover a Damage Scenario is proposed, reduced to two phases in post-impacted fatigue behaviour, instead of three phases for non impacted specimens.
-
tension tension fatigue behaviour of woven hemp fibre reinforced epoxy composite a multi instrumented Damage analysis
International Journal of Fatigue, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence ChocinskiarnaultAbstract:Abstract The purpose of this work is to characterise the tensile–tensile fatigue behaviour of a woven hemp fibre reinforced epoxy composite, adding up analysis of fatigue Damage mechanisms by combining different techniques: optical microscopic and X-ray micro-tomography observations, temperature field measurement by infrared camera, and acoustic emission monitoring (AE). Two different stacking sequences: [0°/90°] and [±45°] are compared. A power law based model is used to fit S–N curves of experimental results. [±45°]7 layups show better fatigue strength than [0°/90°]7 ones, in relative terms. This is explained by the difference of their Damage behaviour, in concordance with the local shear stresses developing in [±45°]7 laminates. Moreover, high resolution micro-tomography pictures allow one to clearly visualise the yarn/matrix interface Damage in these materials. The obtained results give a complete description of fatigue Damage mechanisms, and a Damage Scenario during fatigue tests is proposed for these eco-composite materials.
Davi Silva De Vasconcellos - One of the best experts on this subject based on the ideXlab platform.
-
influence of low velocity impact on fatigue behaviour of woven hemp fibre reinforced epoxy composites
Composites Part B-engineering, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence Chocinskiarnault, Fabrizio Sarasini, Monica Francesca Pucci, C Santulli, Jacopo Tirillo, Salvatore Iannace, Luigi SorrentinoAbstract:Abstract The purpose of this work is to study the resistance to low velocity impact of woven hemp/epoxy matrix composites and the influence of impact Damage on their residual quasi-static tensile and cyclic fatigue strengths. Impact characteristic parameters were evaluated and critically compared to those found in the literature for other similar composites. Damage mechanisms were analysed by using AE monitoring and microscopic observations. An analytical model is used to predict the fatigue lifetime of impacted specimens. Moreover a Damage Scenario is proposed, reduced to two phases in post-impacted fatigue behaviour, instead of three phases for non impacted specimens.
-
tension tension fatigue behaviour of woven hemp fibre reinforced epoxy composite a multi instrumented Damage analysis
International Journal of Fatigue, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence ChocinskiarnaultAbstract:Abstract The purpose of this work is to characterise the tensile–tensile fatigue behaviour of a woven hemp fibre reinforced epoxy composite, adding up analysis of fatigue Damage mechanisms by combining different techniques: optical microscopic and X-ray micro-tomography observations, temperature field measurement by infrared camera, and acoustic emission monitoring (AE). Two different stacking sequences: [0°/90°] and [±45°] are compared. A power law based model is used to fit S–N curves of experimental results. [±45°]7 layups show better fatigue strength than [0°/90°]7 ones, in relative terms. This is explained by the difference of their Damage behaviour, in concordance with the local shear stresses developing in [±45°]7 laminates. Moreover, high resolution micro-tomography pictures allow one to clearly visualise the yarn/matrix interface Damage in these materials. The obtained results give a complete description of fatigue Damage mechanisms, and a Damage Scenario during fatigue tests is proposed for these eco-composite materials.
Fabienne Touchard - One of the best experts on this subject based on the ideXlab platform.
-
influence of low velocity impact on fatigue behaviour of woven hemp fibre reinforced epoxy composites
Composites Part B-engineering, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence Chocinskiarnault, Fabrizio Sarasini, Monica Francesca Pucci, C Santulli, Jacopo Tirillo, Salvatore Iannace, Luigi SorrentinoAbstract:Abstract The purpose of this work is to study the resistance to low velocity impact of woven hemp/epoxy matrix composites and the influence of impact Damage on their residual quasi-static tensile and cyclic fatigue strengths. Impact characteristic parameters were evaluated and critically compared to those found in the literature for other similar composites. Damage mechanisms were analysed by using AE monitoring and microscopic observations. An analytical model is used to predict the fatigue lifetime of impacted specimens. Moreover a Damage Scenario is proposed, reduced to two phases in post-impacted fatigue behaviour, instead of three phases for non impacted specimens.
-
tension tension fatigue behaviour of woven hemp fibre reinforced epoxy composite a multi instrumented Damage analysis
International Journal of Fatigue, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence ChocinskiarnaultAbstract:Abstract The purpose of this work is to characterise the tensile–tensile fatigue behaviour of a woven hemp fibre reinforced epoxy composite, adding up analysis of fatigue Damage mechanisms by combining different techniques: optical microscopic and X-ray micro-tomography observations, temperature field measurement by infrared camera, and acoustic emission monitoring (AE). Two different stacking sequences: [0°/90°] and [±45°] are compared. A power law based model is used to fit S–N curves of experimental results. [±45°]7 layups show better fatigue strength than [0°/90°]7 ones, in relative terms. This is explained by the difference of their Damage behaviour, in concordance with the local shear stresses developing in [±45°]7 laminates. Moreover, high resolution micro-tomography pictures allow one to clearly visualise the yarn/matrix interface Damage in these materials. The obtained results give a complete description of fatigue Damage mechanisms, and a Damage Scenario during fatigue tests is proposed for these eco-composite materials.
L Llanes - One of the best experts on this subject based on the ideXlab platform.
-
indentation and scratch testing of a wc 6 wtco cemented carbide corrosion effects on load bearing capability and induced Damage
Ceramics International, 2020Co-Authors: Y F Zheng, Gemma Fargas, Olivier Lavigne, L LlanesAbstract:Abstract In this work, corrosion effects on the indentation and scratch response of a WC-6%Co hardmetal are investigated. Experimental variables include relative long corrosion times as well as indentation and scratch testing conditions yielding Damage Scenarios whose depths are similar to length scale of the degraded surface layers. It is found that load-bearing capability and crack extension resistance of the cemented carbide grade studied are significantly reduced after exposure to corrosive media. This is related to relevant changes within the microstructural assemblage of the material, from an effective bulk ceramic-metal composite into a porous layer consisting of a binderless carbide network on top of a pristine-like hardmetal substrate. However, such lessening effects are found to be dependent on the ratio between indentation and/or scratch depth and thickness of the corroded layer. Hence, relative changes decrease as corrosion time increases, and no differences are discerned after seven days of immersion. Similar pronounced corrosion influence is evidenced in surface and subsurface Damage Scenario resulting after indentation and scratch tests. In this regard, a transition from well-defined cracking systems into a Scenario consisting of multiple, branched and less shallow fissures is evidenced when comparing pristine and corroded specimens respectively. The experimental fact that referred cracking features for corroded specimens are confined within the porous-like degraded layers points out that it is the result of small length-scale interaction between cracks and the cavities within the binderless WC skeleton, left after the metallic binder has been leached away.
Luigi Sorrentino - One of the best experts on this subject based on the ideXlab platform.
-
influence of low velocity impact on fatigue behaviour of woven hemp fibre reinforced epoxy composites
Composites Part B-engineering, 2014Co-Authors: Davi Silva De Vasconcellos, Fabienne Touchard, Laurence Chocinskiarnault, Fabrizio Sarasini, Monica Francesca Pucci, C Santulli, Jacopo Tirillo, Salvatore Iannace, Luigi SorrentinoAbstract:Abstract The purpose of this work is to study the resistance to low velocity impact of woven hemp/epoxy matrix composites and the influence of impact Damage on their residual quasi-static tensile and cyclic fatigue strengths. Impact characteristic parameters were evaluated and critically compared to those found in the literature for other similar composites. Damage mechanisms were analysed by using AE monitoring and microscopic observations. An analytical model is used to predict the fatigue lifetime of impacted specimens. Moreover a Damage Scenario is proposed, reduced to two phases in post-impacted fatigue behaviour, instead of three phases for non impacted specimens.
