Search Results - "El Guerjouma, R"

Mechanical behaviour and identification of damage by acoustic emission of smart composites by Masmoudi, S, El Mahi, A, El Guerjouma, R, Turki, S

“…Purpose – The smaller sizes of current electronic devices suggest the feasibility of creating a smart composite structure using piezoelectric implant to…”
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Mechanical behaviour and damage evaluation by acoustic emission of composite materials by Ben Ammar, I, El Mahi, A, Karra, C, El Guerjouma, R, Haddar, M

“…Purpose - The aim of the present study is to investigate the mechanical behaviour of cross-ply laminates under static tensile and buckling loading. Different…”
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Damping analysis in cyclic fatigue loading of sandwich beams with debonding by Idriss, M., El Mahi, A., Assarar, M., El Guerjouma, R.

“…The aim of this study is to investigate the mechanical behaviour of sandwich composite materials with debonding under static and dynamic loadings. These…”
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Evidence of microstructure evolution in solid elastic media based on a power law analysis by Scalerandi, M., Idjimarene, S., Bentahar, M., El Guerjouma, R.

“…•We introduce a formalism for modeling the hysteretic elastic behavior of materials using a multi-scale statistical approach.•We classify models according to…”
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Characterization of sandwich beams with debonding by linear and nonlinear vibration method by Idriss, M., El Mahi, A., El Guerjouma, R.

“…The nonlinear vibration method is used to characterize the behavior of sandwich beams with debonding. The technique focuses on the response of the material’s…”
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Creep ruptures in heterogeneous materials by Nechad, H, Helmstetter, A, El Guerjouma, R, Sornette, D

“…We present creep experiments on fiber composite materials with different controlled heterogeneity. All samples exhibit a power-law relaxation of the strain…”
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Damage characterization of polymer-based composite materials: Multivariable analysis and wavelet transform for clustering acoustic emission data by Marec, A., Thomas, J.-H., El Guerjouma, R.

“…In the present work, a procedure for the investigation of local damage in composite materials based on the analysis of the signals of acoustic emission (AE) is…”
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Effects of experimental configuration on the detection threshold of hysteretic elastic nonlinearity by Idjimarene, S., Bentahar, M., El Guerjouma, R., Scalerandi, M.

“…•We performed 1-D study for the propagation of compressional elastic waves in hysteretic media.•Effects of noise and the “receiver/scatterer” distance on the…”
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Andrade and critical time-to-failure laws in fiber-matrix composites: Experiments and model by Nechad, H., Helmstetter, A., El Guerjouma, R., Sornette, D.

“…We present creep experiments on fiber composite materials. Recorded strain rates and acoustic emission (AE) rates exhibit both a power-law relaxation in the…”
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Ultrasonic evaluation of the morphological characteristics of metallic powders in the context of mechanical alloying by Barguet, L., Pezerat, C., Bentahar, M., El Guerjouma, R., Tournat, V.

“…•An ultrasonic method is presented for elastic probing of metallic powders.•A non-monotonous variation of elastic parameters of powders at different stages of…”
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Hysteretic elasticity in damaged concrete: Quantitative analysis of slow and fast dynamics by Bentahar, M., El Aqra, H., El Guerjouma, R., Griffa, M., Scalerandi, M.

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Characterization of Microcracking in Polymer Concrete Using Multiple Scattered Waves Under Steady-State Vibration Conditions by Toumi, S., Mechri, C., Bentahar, M., Boubenider, F., El Guerjouma, R.

“…This work presents the development of an ultrasonic method based on the use of multiple-scattered waves to detect and image microcracks in polymer concrete…”
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Characterization of Structural Noise Patterns and Echo Separation in the Time-Frequency Plane for Austenitic Stainless Steels by Khelil, M., Thomas, Jean-Hugh, Simon, L., El Guerjouma, R., Boudraa, M.

“…The aim of this study is to characterize the structural noise for a better flaw detection in heterogeneous materials (steels, weld, composites...) using…”
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Modelling the attenuation in the ATHENA finite elements code for the ultrasonic testing of austenitic stainless steel welds by Chassignole, B., Duwig, V., Ploix, M.-A., Guy, P., El Guerjouma, R.

“…Multipass welds made in austenitic stainless steel, in the primary circuit of nuclear power plants with pressurized water reactors, are characterized by an…”
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Nonlinear acoustic characterization of micro-damaged materials through higher harmonic resonance analysis by Novak, A., Bentahar, M., Tournat, V., El Guerjouma, R., Simon, L.

“…A method developed for the analysis of nonlinear systems is applied for the first time to non-destructive testing of diverse materials using vibrations and…”
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Microstructural and mechanical characteristics of laser coatings by Hidouci, A., Pelletier, J.M., Ducoin, F., Dezert, D., El Guerjouma, R.

“…The microstructure and mechanical properties of Ni-base alloy, Co-base alloy and (Ni+WC) coatings were investigated experimentally by using X-ray diffraction,…”
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Ultrasonic and structural characterization of anisotropic austenitic stainless steel welds: Towards a higher reliability in ultrasonic non-destructive testing by Chassignole, B., El Guerjouma, R., Ploix, M.-A., Fouquet, T.

“…The non-destructive testing of austenitic stainless steel welds of the primary coolant piping system is a significant problem for the nuclear industry…”
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Non-Destructive Evaluation of Damage and Failure of Fibre Reinforced Polymer Composites Using Ultrasonic Waves and Acoustic Emission by El Guerjouma, R., Baboux, J.-C., Ducret, D., Godin, N., Guy, P., Huguet, S., Jayet, Y., Monnier, T.

“…No s…”
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Critical fracturing phenomenon in heterogeneous materials under external mechanical stress by Jei, Y., Ouaskit, S., Nassif et, R., Boughaleb, Y., Nechad, H., El Guerjouma, R.

“…We analyzed experiments designed for industrial applications in order to test the concept that in heterogeneous materials such as fiber composites concrete…”
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Ultrasonic Study of Elastic Anisotropy of Material Composite by Mouchtachi, A, El Guerjouma, R, Baboux, J C, Santini, P, Merle, P, Bouami, D

“…The anisotropic elastic properties of two Aluminium Matrix Composites (AMC) were characterised using an ultrasonic method. The composite materials, fabricated…”
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