Ultrasonic goniometric immersion tests for the characterization of fatigue post-LVI damage induced anisotropy superimposed to the constitutive anisotropy of polymer composites

Castellano, Anna; Fraddosio, Aguinaldo; Piccioni, Mario Daniele

doi:10.1016/j.compositesb.2017.02.025

Cited by 45 publications

(33 citation statements)

References 25 publications

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“…Non-destructive inspection plays a crucial role in examining the formation of damage in composite materials [41][42][43]. A Cscan system was used to obtain the damage maps ( Fig.…”

Section: Non-destructive Inspectionmentioning

confidence: 99%

Experimental and numerical studies on the impact response of damage-tolerant hybrid unidirectional/woven carbon-fibre reinforced composite laminates

Liu

Falzon

Tan

2018

Composites Part B: Engineering

149

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A woven Five-Harness Satin (5HS) weave with AS4 carbon fibres, and unidirectional high strength IMS60 carbon fibres were used to manufacture hybrid laminates, using resin infusion, to assess their performance in low velocity impact tests. Load/energy-time curves and load-displacement curves were extracted from the experimental data, and non-destructive Cscanning was performed on all pre-and post-impacted specimens to quantify the extent of damage incurred. A finite element-based computational damage model was developed to predict the material response of these hybrid unidirectional/woven laminates. The intralaminar damage model formulation, by necessity, consists of two sub-models, a unidirectional constitutive model and a woven constitutive model. The built-in surface-based cohesive behaviour in Abaqus/Explicit was used to define the interlaminar damage model for capturing delamination. The reliability of this model was validated using in-house experimental data obtained from standard drop-weight impact tests. The simulated reactionforce and absorbed energy showed excellent agreement with experiment results. The post-impact delamination and permanent indentation deformation were also accurately captured. The accuracy of the damage model facilitated a quantitative comparison between the performance of a hybrid unidirectional/woven (U/W) laminates and a pure unidirectional (PU) carbon-fibre reinforced composite laminates of equivalent lay-up. The hybrid laminates were shown to yield better impact resistance.

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“…Non-destructive inspection plays a crucial role in examining the formation of damage in composite materials [41][42][43]. A Cscan system was used to obtain the damage maps ( Fig.…”

Section: Non-destructive Inspectionmentioning

confidence: 99%

Experimental and numerical studies on the impact response of damage-tolerant hybrid unidirectional/woven carbon-fibre reinforced composite laminates

Liu

Falzon

Tan

2018

Composites Part B: Engineering

149

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“…To date, non-destructive testing (NDT) techniques play a fundamental role in diverse industrial areas (such as aerospace, automotive, naval and sporting goods, etc.) for the detection of defects in composite material components in order to ensure their integrity during both the manufacturing phase and the service life [7]. Many types of NDT methods are used for flaw analysis, including ultrasonic inspection, X-ray, acoustography, shearography, acoustic emission, etc.…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Testing of Low-Velocity Impacted Composite Material Laminates through Ultrasonic Inspection Methods

Segreto¹,

Teti²,

Lopresto³

2019

Characterizations of Some Composite Materials

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Low-velocity impact damages in composite material laminates, such as matrix cracks, delaminations and fibre breakage, usually develop inside the material and can be difficult to detect. As these flaws downgrade the structural integrity of the composite, the thorough damage evaluation is essential to assess the impact damage criticality. This chapter focuses on the ultrasonic non-destructive inspection of low-velocity impacted composite laminates for damage estimation and assessment. The impact damage generation mechanisms are described and characterised. Ultrasonic testing methods and their defect detection capabilities are illustrated. Recent research studies on ultrasonic nondestructive evaluation of low-velocity impacted composite materials are presented and discussed.

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“…Ultrasonic methods have been very popular in nondestructive testing and characterization of materials and monitoring progressive damage of rocks. Ultrasonic techniques have been employed by several researchers (see for example Audoin and Baste (1994); Hufenbach et al (2006); Castellano et al (2017)) to identify purely phenomenological models of anisotropic damage for composite materials. Our approach extends these models to equate the phenomenological models of experimentally measured stiffness reduction during loading given by ultrasound measurements to general fourth order anisotropic damage tensorial models given by continuum damage mechanics.…”

Section: Introductionmentioning

confidence: 99%

Bridging the macro to mesoscale: Evaluating the fourth-order anisotropic damage tensor parameters from ultrasonic measurements of an isotropic solid under triaxial stress loading

Olsen-Kettle

2018

International Journal of Damage Mechanics

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One of the most challenging problems which arises in continuum damage mechanics is the selection of variables to describe the internal damage. Many theories have been proposed and various types of damage variables ranging from scalar to vector to tensor quantities have been used. In this paper we consider anisotropic damage and the most general form for damage by using a fourth order tensor for the damage variables. We demonstrate how experimentally measured quantities can be related to the internal tensorial damage variables. We apply this analysis to experiments of an initially isotropic solid becoming transverse isotropic under triaxial or uniaxial stress loading.

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Ultrasonic goniometric immersion tests for the characterization of fatigue post-LVI damage induced anisotropy superimposed to the constitutive anisotropy of polymer composites

Cited by 45 publications

References 25 publications

Experimental and numerical studies on the impact response of damage-tolerant hybrid unidirectional/woven carbon-fibre reinforced composite laminates

Experimental and numerical studies on the impact response of damage-tolerant hybrid unidirectional/woven carbon-fibre reinforced composite laminates

Non-Destructive Testing of Low-Velocity Impacted Composite Material Laminates through Ultrasonic Inspection Methods

Bridging the macro to mesoscale: Evaluating the fourth-order anisotropic damage tensor parameters from ultrasonic measurements of an isotropic solid under triaxial stress loading

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