Souhail AMAMI

Souhail AMAMI

Senior Researcher at Samsung Heavy Industries

Geoje, Gyeongsangnam-do, Korea
Mechanical or Industrial Engineering

Souhail AMAMI's Overview

  • Université de Technologie de Compiègne
  • Université de Technologie de Compiègne
  • ENIS

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Souhail AMAMI's Publications

  • Characterization by acoustic emission and electrochemical impedance spectroscopy of the cathodic disbonding of Zn coating

    • Corrosion Science
    • May 5, 2010
    Authors: Souhail AMAMI, Christian Lemaitre

    Galvanized steel has been tested in a synthetic sea water solution under different cathodic overprotection conditions. The generated hydrogen flux caused the damage of the metal–zinc interface and led to a progressive coating detachment.

    Scanning electron microscopy, electrochemical impedance spectroscopy and acoustic emission technique were used to characterize the damage chronology under different cathodic potentials.

    A damage mechanism was proposed and the acoustic signature related to the coating degradation was statistically identified using clustering techniques.

  • Acousto-ultrasonics for nondestructive evaluation of epoxy adhesive joint integrity in complex structures

    • 10ème Congrès Français d'Acoustique
    • April 12, 2010
    Authors: Souhail AMAMI, Serge Dos Santos, Adriana Savin, W. J. Jeon, J.H. Bae, K.H. Joh, M. K. Ha

    In industry, achieving a perfect adhesive joint is a quite complicated matter. It requires following rigorous procedures for surface preparation to minimize the risks of surface contamination and to increase glue impregnation on both the surfaces to be bonded. The bonding and curing must also be carried out in controlled atmosphere: temperature and humidity must be continually monitored to ensure an optimal curing and to guarantee maximal bonding strength. Once the adhesive joint is cured, few nondestructive testing methods are available to evaluate bonding quality. This article presents three acousto-ultrasonic methods used to detect and localize defects in epoxy adhesive joints: wave attenuation, Lamb wave generated by Hertzian contact, and nonlinear Time Reversal (TR) based Nonlinear Elastic Wave Spectroscpoty TR-NEWS methods associated to chirp-coded excitations. Results showing the detectability of defects are presented. An immediate test of its capability to detect scatterers will be practically implemented using approach recently proposed and leading to in-situ epoxy adhesive joint pseudo-tomography.

  • Symmetry Analysis Signal Processing for Local Nonlinear Scatterers Signature of Complex Materials Structural Integrity

    • 10th European Conference on Nondestructive testing
    • June 7, 2010
    Authors: Souhail AMAMI, Serge Dos Santos, Sarka Vejvodova, Zdenek Prevorovsky

    Over the last few decades, increasing interest has been bestowed on employing nonlinear wave propagation effects (which possess the intrinsic property of enlarging bandwidth frequency of analysis) to detect, at a sub-wavelength scale (below the ultrasonic wavelength), the early damage in the degradation process leading to mechanical fracture. Higher frequencies are used for resolution improvement and lower frequencies for aging monitoring. The NDT community today refers to methods based on analysis of nonlinear effects as Nonlinear Elastic Wave Spectroscopy (NEWS). Recent years have seen considerable development (both in numerical- and experimental aspects) of Time Reversal (TR)-based NEWS methods using TR invariance and reciprocity. The defined TR-NEWS methods were integrated into applications for improving identification of nonlinear scatterers, such as bubbles, landmines, cracks in complex aeronautic materials, and these techniques are now widely recognized as extremely reliable. The complexity of the experimental set-up has been analyzed with a recent signal processing analysis using symmetry analysis combined with localization methods using the Decomposition of the Time Reversal Operator (DORT), with the objective to detect and localize spatially the nonlinear scatterers responsible of the damaged properties of complex material. Several experimental configurations will be presented in the paper, with materials and medium coming from aeronautic industry (cracked aluminum samples, damaged composites, heated layered materials), from the maritime systems (epoxy adhesive joints), and also from the bio-medical characterization of bio-materials. The specimens under test are analyzed by means of ultrasonic transducers (10 MHz) amplified with a 150W power amplifier.

  • Comparison Between a Neural Networks and Pattern Recognition Classification

    • European Working Group on Acoustic Emission
    • September 16, 2008
    Authors: Souhail AMAMI, Salah Mechraoui

    For a reliable acoustic emission (AE) monitoring of petrochemical storage tanks, collection of
    AE events for several hours under quiet environment is required. Then AE diagnosis is based on
    the classification of the recorded data. Reliable phenomenon identification is needed. Commonly neural network classification and pattern-recognition classification are used. However, the questions are: what is the uncertainty of each classification method and what is their success rate in the phenomenon identification. This work consists of a comparison between a neural network classification and a pattern-recognition classification of AE events collected from laboratory tests. For this, several new and old corrosion tests have been carried out in laboratory. The new corrosion tests have been realized on a low-carbon steel used in crude-oil manufacturing. The old corrosion tests have been carried out on steel specimens cut from a real storage tank. Finally, AE from leaks is simulated on the bottom of a mini-structure, which stores liquid (water and diesel oil), producing AE through turbulent flow.

  • Acousto-Ultrasonic Method for Defect Detection in Epoxy Adhesive Joints

    • NDT in Progress
    Authors: Souhail AMAMI, J.H. Bae, J.W. Jeong, K.H. Joh, M.K. Ha

    Acousto-ultrasonic method was developed for defect detection in epoxy adhesive joint the test method as well as test results showing the defect detectability are presented

  • Acoustic Emission Analysis of Crack Growth in a Corrosion Product

    • Advanced Materials Research (Volumes 13 - 14)
    • February 15, 2006
    Authors: Souhail AMAMI, Salah-Eddine Mechraoui

    In the chemical and petrochemical industry the storage tanks under operation are very often subjected to high mechanical stress, fatigue stress, aging and corrosion phenomena reducing their lifespan. Corrosion phenomena related to the aggressiveness of the stored chemical products is often the origin of leaks in this kind of structures and corrosion monitoring is required for preventive maintenance of storage tanks. Various non destructive testing techniques are used, the most common method consists in empting the tank, cleaning it and finally sanding its floor and walls, Thereafter, a visual inspection is carried out and a control with non destructive methods such as MFL (Magnetic Flux Leakage), is performed. The cost of this operation varies according to the size of the storage tank and the possible production shutdown. Acoustic emission technique bas major advantages compared to the traditional NDTs. It's a global technique which can be applied online without significant immobilization of the structure.

    The aim of this work is to analyze the acoustic emission generated by a crack growth in corrosion product and to identify the signature of the AE produced by different damage mechanisms: micro-crack, crack growth, coalescence. To carry out this experimental investigation, three point bending tests have been performed using samples taken from a naturally corroded flat bottomed crude oil storage tank.

  • Detection by Acoustic Emission Technique of the Corrosion Stress Cracking Within Steel Structures In H2S Containing Mediums

    • EUROCORR 2003 The European Corrosion Congress
    • October 2, 2003
    Authors: Souhail AMAMI, Henri MAZILLE, Jean-Pierre MILLET, Pierre MARCHAND, Sébastien DUVAL, Xavier LONGAYGUE, Marion FREGONESE

    Acoustic emission (AE) was used for monitoring steel cracking during exposure to wet hydrogen sulfide (H2S) environments. A method for filtering AE data related to hydrogen-induced cracking (HIC) was presented and applied for several case studies. In a series of tests on unstressed sweet service steels, evolution of AE indicated three successive HIC phases. An initial incubation period corresponded to hydrogen entry in the steel, during which no cracking occurred. Then two cracking phases were detected. The first was associated with decohesion of weak steel interphases. The second was identified as crack propagation under high internal hydrogen pressure. Crack propagation decreased and eventually ceased over time. Analysis of AE data was then used to evaluate the extent of HIC after sour exposure. Correlation was found when appropriate data filtering was applied. AE analysis was also applied to sour service steels under an applied load. The first steel exhibited HIC AE signals. Its fracture surface was typical of a stress-oriented hydrogen-induced cracking (SOHIC) mode of failure, in good agreement with AE results. For the second steel, which also failed during the test, no AE related to HIC was detected. Fracture surface was typical of sulfide stress cracking (SSC), also in good agreement with AE findings.

  • Early Detection and Monitoring of Sulfide Stress Cracking (SSC) of steels by an Acoustic Emission Method

    • International Conference on Environmental Degradation of Engineering Materials
    • June 29, 2003
    Authors: Souhail AMAMI, Henri MAZILLE, Pierre MARCHAND,, Sébastien DUVAL, Xavier LONGAYGUE, Marion FREGONESE, Jean-Pierre MILLET

    n the petroleum industry, it is known that equipments which operate in wet hydrogen sulfide (H2S) media can be subjected to damages like Hydrogen Induced Cracking (HIC) and Sulfide Stress Cracking (SSC). In this study, Acoustic Emission (AE) technique is used to monitor the cracking of steels immersed in sour media. The aim is to establish a methodology for HIC and SSC detection by AE and therefore to get more detailed information on the cracking mechanisms in steels during standard tests. The main focus of this article is the preliminary identification of the different AE sources involved during the tests performed in sour media. The methodology of identification of the different AE signals and the monitoring of HIC and SSC tests performed on different steel grades are described. The results indicate that AE can provide an early detection of cracking (HIC and SSC) when the various AE sources are identified.

  • Etude par électrochimie et par émission acoustique du décollement de couches de galvanisation sous protection cathodique

    • Congrès Matériaux septembre 2002 Tours, France
    • October 21, 2002
    Authors: Souhail AMAMI, C.LEMAITRE, A.LAKSIMI
  • Emission Acoustique et Mécanismes d'Endommagement du Revêtement sur un Acier Galvanisé Sous Protection Cathodique en Milieu Marin

    • Le 5ème congrès de mécanique , Faculté des Sciences Mekhnes Morocco.
    • April 20, 2001
    Authors: Souhail AMAMI, A.LAKSIMI, C.LEMAITRE
  • Etude de la Corrosion par Piqûres des Structures Enterrées

    • Le 4ème congrès de mécanique F.S.T Mohammedia Morroco
    • April 19, 1999
    Authors: Souhail AMAMI, C.LEMAITRE
  • Utilisation du modèle des défauts ponctuels dans les films passifs pour prévoir la tenue à la corrosion par piqûres. Application aux aciers inoxydables

    • Les Journées d'Automne de la Société Française de Métallurgie et de Matériaux
    • October 27, 1998
    Authors: Souhail AMAMI, C.LEMAITRE
  • Etude d'un Critère d'Endommagement et Modélisation de la Corrosion par Piqûres des Structures Enterrées

    • Les deuxièmes journées de Mécanique et d'Ingénierie
    • April 22, 1997
    Authors: Souhail AMAMI, C.LEMAITRE
  • Insulation Panel Structure and an Assembling Method Thereof, Preventing Gas Leak and Facilitating Assembly / 인슐레이션 패널 구조 및 그 조립방법

    • Korean Intellectual Property Office
    • October 19, 2007
    Authors: Souhail AMAMI, JOH, Kihun

    An insulation panel structure and an assembling method thereof are provided to prevent gas leak and facilitate assembly

    CONSTITUTION: An insulation panel structure comprises one unit insulation panel block(100). The unit insulation panel block is formed to fold a part of an upper insulation panel(120) and a lower insulation panel(110) through a tight membrane(130). The lower part insulation panel adheres to the one side of the tight membreane in order that two sides crossing at right angles and two sides of the lower insulation panel crossing at right angles are same.

  • Apparatus and a Method for Testing a Defect of a Secondary Barrier Using Electric Properties of Epoxy Glue / 2차 방벽의 결함부 검사장치 및 검사방법

    • Korean Intellectual Property Office
    • August 30, 2007
    Authors: Souhail AMAMI, JEONG, Wang Jo, LIM, BYOUNG OK

    Patent: An apparatus and a method for testing a defect of a secondary barrier are provided to detect a defect of epoxy glue connecting a supple triplex to a rigid triplex accurately and enable a user to confirm the defect easily when the epoxy glue contains a defective area.

    CONSTITUTION: An apparatus for testing a defect of a secondary barrier comprises the following units. An electricity applying unit (100) applies an anode and a cathode to a supple triplex and a rigid triplex respectively. A controller (110) determines a defective area of an epoxy glue based on electric properties stored in an epoxy glue. A method for testing a defect of a secondary barrier is composed of the following steps. The anode and the cathode are applied to the supple triplex and the rigid triplex respectively. The applied electricity is stored in the epoxy glue. The stored electric properties are detected and determined whether the epoxy glue contains a defective area or not when the detected electric properties are different from the stored electric properties.

  • A Device, And an Inspecting Method for Simultaneous Detection of Defect and Defect Shape in the Second Barrier Using a Pressurization Unit / 2차 방벽의 결함부 검사장치 및 검사방법

    • Korean Intellectual Property Office
    • August 30, 2007
    Authors: Souhail AMAMI, JEONG, Wang Jo, LEE, Jong Gyu

    Patent: A device for detecting the defect of a second barrier comprises a pressurization unit(100) locally uniformly adding pressure to a supple triplex and a controller(200) detecting an air layer or an included impurity of a bonding surface and determining the defect with a pressure value measured by the pressurization unit. The method for detecting the defect of a second barrier comprises a step of locally adding pressure to the supple triplex with the pressurization unit while moving on the second barrier; a step of counting the local elasticity value; and a step of deciding the existing of defect base on the local elasticity value.

  • Ultrasonic Device and Inspecting Method for the local Inspection of a Secondary Barrier / 2차 방벽의 결함부 검사방법

    • Korean Intellectual Property Office
    • August 30, 2007
    Authors: Souhail AMAMI, BAE, Junhong, JOH, Kihun, HA, Munkeun

    Patent : A defect inspection device and inspecting method of a second barrier comprises an input sensor(100) vibrating a bonding surface of a supple triplex(26) with the ultrasonic wave by using an electric signal; an output sensor(110) converting the ultrasonic wave, propagated from the input sensor, into the electric signal; an amplifier(120) augmenting the signal detected by the output sensor; a filter section(130) accepting a fixed band from the signal detected by the amplifier; and a controller(150) determining the adhesion failure of a supple triplex based on the signal of the filter section.

  • Leak Detecting Method and Apparatus Using Absorption Spectrum/리크 검출 방법 및 장

    • Korean Intellectual Property Office
    • June 12, 2008
    Authors: Souhail AMAMI, Lim, Byoungok

    Patent: A leak detecting method using absorption spectrum of gas and an apparatus thereof are provided to detect the leak regardless of change of surrounding environment like humidity and temperature.

    CONSTITUTION: A plurality of lights is radiated to an object(810). The light reflects the object and analyzes a plurality of reflection lights from the object. The leak on the object is detected(815). One of a plurality of lights is charged in the wavelength range of the absorption spectrum of the gas absorbed inside object. The others do not change in the wavelength range of the absorption spectrum of the gas absorbed inside object.

  • Insulation Structure for a Liquefied Natural Gas Cargo Tank, Capable Of Improving the Sealing Force of a Cargo Tank / 액화천연가스 운반선 화물창의 단열구조

    • Korean Intellectual Property Office
    • August 24, 2009
    Authors: Souhail AMAMI, 임병옥

    Patent: An insulation structure for a liquefied natural gas carrier tank comprises upper insulation panels(120), lower insulation panels(110), a first metal foil(140), a top bridge panel(160), and a second metal foil(150). The upper and lower insulation panels are installed inside a carrier tank to be separated from each other. The first metal foil is installed between the upper and lower insulation panels. The top bridge panel is installed between the upper insulation panels. The second metal foil is attached on the bottom surface of the top bridge panel and the top surface of the first metal foil.

  • Apparatus and method for sensor arrangement / 센서 위치 표시장치 및 그 표시방법

    • Korean Intellectual Property Office
    • April 14, 2009
    Authors: Souhail AMAMI, Lee, Jonggyu, Jeong, Wangjo

    Patent :An input unit(110) obtains the shape information of an inspection target, the location information of plurals of sensors, and the limitation value of sensor distances. A sensor location verifying unit(120) verifies whether the closest distance between sensors satisfies the limitation value using the location information. The sensor location verifying unit includes a coordinate distance converting unit generating converting reference information using the shape information and shape coordinate. An image outputting unit(140) outputs a drawing based on the shape information of the inspection target.

  • Cylindrical Pump Tower and a Ship Having the Same Capable Of Reducing Manufacturing Costs / 원통형 펌프타워 및 이를 포함하는 선박

    • Korean Intellectual Property Office
    • November 4, 2010
    Authors: Souhail AMAMI, BAE, JUNHONG, Kim, HyunChul

    Patent: A cylindrical pump tower and a ship having the same are provided to reduce size and weight of structure because each pipe is longitudinally formed inside a cylindrical frame in parallel.

    CONSTITUTION: A cylindrical pump tower(10) comprises a cylindrical frame(12), an emergency pipe(14), a loading pipe(16), and a pair of unloading pipes(18a,18b). The cylindrical pump tower is vertically installed in a cargo space. The emergency pipe is longitudinally installed inside the cylindrical frame. The emergency pipe uses in emergency. The loading pipe is longitudinally installed inside the cylindrical frame. The loading pipe loads liquid cargo. The pair of unloading pipes is longitudinally installed inside the cylindrical frame and unloads the liquid cargo.

  • Guide Device for a Welding Robot, Capable Of Being Supported To a Membrane Regardless Of the Shape of a Crossed Part / 용접로봇용 가이드장치

    • Korean Intellectual Property Office
    • April 7, 2011
    Authors: Souhail AMAMI, Chae, Hee-Moon, Kim, HyunChul

    Patent: A welding robot comprises a base unit(10), a support unit(30), and a magnetic force generator. The base unit provides a route for the welding robot. The support unit comprises transverse corrugated portions(3a), longitudinal corrugated portions(3b), and a magnetic body. The transverse corrugated portions support the base unit to a first membrane panel. The transverse corrugated portions and longitudinal corrugated portions are placed at a first intersection portion(3c). The magnetic force generator generates magnetic force which pulls the magnetic body.

  • Apparatus for welding inspection / 용접부 검사장치

    • Korean Intellectual Property Office
    • May 6, 2011
    Authors: Souhail AMAMI, 임병옥

    Patent: Inspecting device comprising a pair of attachment devices(10), an air pump(20), and a pressure gauge(30). The pair of attachment devices is attached so that each through-hole is connected to gaps exposed between welded portions. The air pump is joined to one of the attachment devices. The air pump injects air through the through-holes. The pressure gauge is joined to the other one of the attachment devices. The pressure gauge is joined to the through-hole in order to measure the pressure of the air in the gaps.

  • Insulation Structure of an LNG Cargo Tank and a Ship with the Same Capable of Increasing the Airtightness of a Secondary Barrier /액화천연가스 화물창의 단열구조 및 이를 구비한 선박

    • Korean Intellectual Property Office
    • April 25, 2011
    Authors: Souhail AMAMI, LEE, JAE MIN, Kim, HyunChul, BAE, JUNHONG

    Patent: An insulation structure of a LNG cargo tank comprises multiple lower insulation panels(120), metal sheets(130), and metal strips(140). The underside of the lower insulation panels is attached to the inner wall of an LNG cargo tank. Chamfered portions are formed on the upper edges of the lower insulation panels. The metal sheets cover the chamfered portions to form an internal space at the top of the chamfered portions. The metal sheets are attached at the top and the sides of the lower insulation panels. Both ends of the metal strips are welded on the metal sheets arranged in the exterior of the internal space of the neighboring lower insulation panels.

Souhail AMAMI's Education

Université de Technologie de Compiègne


Université de Technologie de Compiègne




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