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Medium velocity impact

Experimental results of medium velocity impact tests for reinforced foam core braided composite structures

Experimental results of medium velocity impact tests for reinforced foam core braided composite structures

... Absorbing impact energy at sub-system level is an attractive idea that is emphasized by new composite reinforcement techniques such as stitching or ...of medium velocity impact tests carried ...

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Combined loadings after medium velocity impact on large CFRP laminate plates: Tests and enhanced computation/testing dialogue

Combined loadings after medium velocity impact on large CFRP laminate plates: Tests and enhanced computation/testing dialogue

... 1. Introduction Because of their high strength-to-weight ratio, composite materials are now widely used in aeronautical structures. In fact, their mass per- centages for the recent Boeing 787 and Airbus A350 XWB exceed ...

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On the modelling of low to medium velocity impact onto woven composite materials with a 2D semi-continuous approach

On the modelling of low to medium velocity impact onto woven composite materials with a 2D semi-continuous approach

... an impact loading, a specific experimental set up has been ...test impact has been performed onto a single ply of carbon-epoxy 5-harness satin woven ...All impact tests have led to a fracture shape ...

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Combined loadings after medium velocity impact on large CFRP laminate plates: Tests and enhanced computation/testing dialogue

Combined loadings after medium velocity impact on large CFRP laminate plates: Tests and enhanced computation/testing dialogue

... the impact location and the al- lowables used to size aerospace composite structures may be too con- ...other impact energies and to obtain envelope ...

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A digital image correlation method for tracking planar motions of rigid spheres: application to medium velocity impacts

A digital image correlation method for tracking planar motions of rigid spheres: application to medium velocity impacts

... during medium velocity im- pact experiments performed with gas-gun ...and impact loads during gas-gun tests with a single high speed ...· impact force · medium velocity ...

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Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures

Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures

... to impact loading [1] . Impact damage in sandwich structures can be caused by tool drops, runway debris, bird strikes, hailstorms or ballistic ...low-velocity impact may result in drastic ...

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Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins

Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins

... bert–Hughes–Taylor algorithm with automatic time stepping (implicit predictor–corrector scheme) was selected [33]. In spite of the relative simplicity of the model used, the numerical simulations fit the experimental ...

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A reduced model to simulate the damage in composite laminates under low velocity impact

A reduced model to simulate the damage in composite laminates under low velocity impact

... to impact damage than similar metallic structures. Impact can result in numerous damage mechanisms, ranging from barely visible impact damage (BVID) to complete penetration, which neverthe- less ...

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Impact of switching bug trackers: a case study on a medium-sized open source project

Impact of switching bug trackers: a case study on a medium-sized open source project

... In this paper, we study the case of the Coq proof assistant, a medium-sized open source software project. The contributions of this paper are practical, empirical, and methodological. First, we improved an ...

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Permanent indentation characterization for low-velocity impact modelling using three-point bending test

Permanent indentation characterization for low-velocity impact modelling using three-point bending test

... low-velocity impact simulation 3,4 and to propose a way to identify param- eters governing permanent ...on impact model and validate on test ...

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Finite Element Simulation of Low Velocity Impact Damage on an Aeronautical Carbon Composite Structure

Finite Element Simulation of Low Velocity Impact Damage on an Aeronautical Carbon Composite Structure

... Roger Pierre Lemanle Sanga 1 · Christian Garnier 1 · Olivier Pantal´e 1 Abstract Low velocity barely visible impact damage (BVID) in laminated carbon com- posite structures has a major importance for ...

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Investigation of damage mechanisms in 3D interlock textile composites under low velocity soft impact loading

Investigation of damage mechanisms in 3D interlock textile composites under low velocity soft impact loading

... the velocity mesurements, the evolution of the rubber impactor behavior, the textile pattern not perfectly repeated and uniform due to the RTM process but also the very large representative unit cell compared to ...

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The impact of salt crusts and salt cauliflowers on evaporation from a porous medium

The impact of salt crusts and salt cauliflowers on evaporation from a porous medium

... (a) (b) (a)Cauliflower efflorescence (bead diameter=300 µm), (b) crusty efflorescence (bead diameter=5-50 µm) References [1] S.Veran-Tissoires, M.Marcoux, M.Prat, Discrete salt crystallization at the surface of a porous ...

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Permanent indentation characterization for low-velocity impact modelling using three-point bending test

Permanent indentation characterization for low-velocity impact modelling using three-point bending test

... depth, impact behaviour, damage mechanics, damage tolerance, three-point bending test Introduction In recent years, the use of composite structures has increased in aeronautical and aerospace applications, thanks ...

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Assessment of failure criteria and damage evolution methods for composite laminates under low-velocity impact

Assessment of failure criteria and damage evolution methods for composite laminates under low-velocity impact

... low-velocity impact or crush events, ...low-velocity impact in a three-point bending configuration, Santiuste et ...low-velocity impact, as found in an investigation by Liu et ...

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KLUN+ peculiar velocity survey

KLUN+ peculiar velocity survey

... The enhanced Kinematics of the Local Universe (KLUN+) galaxy sample is a collection of galaxies suitable for Tully-Fisher (TF) or Faber-Jackson (FJ) distance estimation. Here we extract a subsample of 6229 KLUN+ galaxies ...

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Non-linear Velocity Aided Attitude Estimation and Velocity Control for Quadrotors

Non-linear Velocity Aided Attitude Estimation and Velocity Control for Quadrotors

... 4 VELOCITY CONTROLLER In this section, we present the theoretical development of the velocity controller for precise tracking of velocity ...the velocity error dynamics under the proposed ...

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Low velocity impact response and damage of laminate composite glass fibre/epoxy based tri-block copolymer

Low velocity impact response and damage of laminate composite glass fibre/epoxy based tri-block copolymer

... sensitivity. Impact resistance of the composite was investigated by means of low velocity impact ...low velocity impact results indicate that the addition of Nanostrength leads to the ...

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The velocity of meteoroids

The velocity of meteoroids

... meteor velocity argument was one of the main motivations for holding this workshop and so it would not be correct for further discussion to take place here, other papers will throw light on ...

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Validation of low velocity impact modelling on different stacking sequences of CFRP laminates and influence of fibre failure

Validation of low velocity impact modelling on different stacking sequences of CFRP laminates and influence of fibre failure

... This paper presents a validation of low-velocity impact Finite Element (FE) modelling. Based on switching ply location of reference layup [0 2 , 45 2 , 90 2 , ÿ45 2 ] s T700GC/M21 laminated plates from ...

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