Optimisation fiabiliste de l'endommagement en fatigue d'un matériau composite fibres de verre-époxyde

Chahid, Makhlad; Ghorba, Mohamed El; Benhamou, Marc; Azari, Z.

doi:10.1051/mattech/199684110013

Cited by 5 publications

(6 citation statements)

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“…To find a formula that links damage and reliability across the life fraction, we must write the two parameters according to the life fraction. We start with the expression of reliability which is an explicit function of time according to Weibull's law [12]:…”

Section: Reliabilitymentioning

confidence: 99%

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Wire Rope Reliability Assessment based on Damage Mechanics

Wahid¹,

Mouhib²,

Ouardi³

et al. 2019

IJPE

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In order to estimate the instantaneous reliability during a periodic inspection of a lifting wire rope, analytical methods based on experimental results have been developed. Our approach is to study the influence of number of broken strands in the outer layer on the mechanical behavior of the wire rope. To do this, we have evaluated the damage of the wire rope through a static damage model used to predict the lifetime of the steel wire rope. Then, we estimate the reliability by the Weibull law. Finally, we linked the two parameters (damage and reliability) across the life fraction to find the correspondent reliability at each stage of the damage to conduct a predictive maintenance and change the wire rope at the right time.

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Section: Reliabilitymentioning

confidence: 99%

“…The simplified expression of the reliability in term of the life fraction, it is given by the following relationship [5][6]12]:…”

Section: Reliabilitymentioning

confidence: 99%

Wire Rope Reliability Assessment based on Damage Mechanics

Wahid¹,

Mouhib²,

Ouardi³

et al. 2019

IJPE

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“…To help industrialists in predictive maintenance, new damage is calculated from static damage [6], Eq. 6.…”

Section: Relationship Damage -Reliabilitymentioning

confidence: 99%

Prediction of the Lifetime of the Chlorinated PVC Thermoplastic Material Subjected to Thermomechanical Tests - Tensile Test under the Influence of Temperature

Gugouch¹,

Sandabad²,

Mouhib³

et al. 2019

KEM

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In this paper we are studying the effects of temperatures ranging from-10 to 70°C of behavior on chlorinated PVC (CPVC), whose direct consequences are the strong modifications of the mechanical and physical characteristics of this polymer [1]. The purpose of this paper is to predict the damage of non-weld CPVC, based on simple tensile tests on non weld specimens. Thereafter and with the establishment of the relation Damage-Reliability, the critical life fraction βc is identified that predicts the time at which the damage becomes sudden and it is necessary to calculate the reliability and predictive maintenance of the system.

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“…The first one is already found in the case of independent (from a damage point of view) parallel components, and the associated variable Li D , is written as [23] 1…”

Section: Modeling Of the Electrical Damagementioning

confidence: 99%

“…The first has been derived for the case of systems with independent components (from a damage point of view). In this case, the associated damage variable Ti D can be written as [23] ( )…”

Section: Modeling Of the Electrical Damagementioning

confidence: 99%

Investigation of Electrical Stability of Nonwovens with Conductive Circuits Using Printed Conductive Inks

Maarouf¹,

Chahid²,

Ouarch³

2015

JTST

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In this work, we study the stability of a class of materials obtained by printing a textile with conductive inks using a method called screen printing. Under the action of a certain external factors, the printed circuit suffers deterioration and the conductivity decreases considerably. In this work, we propose to model the overall damage of the textile sheet in terms of the partial damages of the conductive lines. We also apply this approach to evaluate the damage of a system being made of transmission lines printed into nonwoven substrates using different conductive inks.

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Optimisation fiabiliste de l'endommagement en fatigue d'un matériau composite fibres de verre-époxyde

Cited by 5 publications

References 0 publications

Wire Rope Reliability Assessment based on Damage Mechanics

Wire Rope Reliability Assessment based on Damage Mechanics

Prediction of the Lifetime of the Chlorinated PVC Thermoplastic Material Subjected to Thermomechanical Tests - Tensile Test under the Influence of Temperature

Investigation of Electrical Stability of Nonwovens with Conductive Circuits Using Printed Conductive Inks

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