تصفح حسب المؤلف "Sassi, Sadok"
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Active control of noise in ventilation ducts
Paurobally, Mohammad Roshun; Sassi, Sadok; Renno, Jamil ( Canadian Acoustical Association , 2019 , Conference Paper)Ventilation ducts are often lined with passive absorption material for both thermal insulation and noise and vibration reduction. However, the noise reduction performance is not significant at low frequencies. Active Noise ... -
Calculating the response of waveguides to base excitation using the wave and finite element method
Renno, Jamil; Sassi, Sadok; Alnahhal, Wael I. ( SAGE , 2021 , Article)The prediction of the response of waveguides to time-harmonic base excitations has many applications in mechanical, aerospace and civil engineering. The response to base excitations can be obtained analytically for simple ... -
Design and efficiency evaluation of a new wearable device for multi-degree suppression of hand pathological tremor
Yousef, Mo’ath; Hafizh, Muhammad; Sassi, Sadok; Muthalif, Asan G.A. ( SAGE , 2023 , Article)Sufferers of onset upper limb tremors find difficulty performing daily tasks due to rapid involuntary movements. Traditional treatments being offered help alleviate symptoms but are costly and can be invasive. Wearable ... -
Enhancing the damping effect of MRF damper using an external magnetic excitation system
Badri, Yousif; Alhams, Amir; Sassi, Sadok; Hussein, Mohammed; Renno, Jamil ( Institute of Physics Publishing , 2023 , Article)The magnetic field generated by the damper’s magnetic circuit governs the yield stress value of the Magnetroholgical Fluid (MRF) damper and hence its damping effect. This paper contributes to the literature on the development ... -
Experimental and numerical investigation of damping in a hybrid automotive damper combining viscous and multiple-impact mechanisms
Badri, Yousif; Sassi, Sadok; Hussein, Mohammed; Renno, Jamil ( SAGE , 2022 , Article)One of the least investigated approaches in passive vibration control is the possibility of combining different types of dampers that use different damping principles. Such a combination process, if wisely designed and ... -
Experimental investigation of the crashworthiness performance of fiber and fiber steel-reinforced composites tubes
Samer, Gowid; Mahdi, Elsadig; Renno, Jamil; Sassi, Sadok; Kharmanda, Ghais; Shokry, Abdallah... more authors ... less authors ( Elsevier , 2020 , Article)Crashworthiness plays a key role in energy absorption and hence in vehicle accidents. The energy absorption capacity of laminated composite materials is heavily investigated in the industry due to their low cost, corrosion ... -
Experimental Investigation of the Vibration Control of Nonrotating Periodic Drill Strings
Sassi, Sadok; Renno, Jamil; Zhou, Han; Baz, Amr ( American Society of Mechanical Engineers , 2021 , Article)During the drilling process in oil and gas fields, slender drill strings often experience a multitude of complex and simultaneous vibrational phenomena. Drill string vibrations hinder the drilling process and can cause ... -
Fractional-order controllers for stick-slip vibration mitigation in oil well drill-strings
Derbal, Massinissa; Gharib, Mohamed; Refaat, Shady S.; Palazzolo, Alan; Sassi, Sadok ( SAGE , 2021 , Article)Drillstring–borehole interaction can produce severely damaging vibrations. An example is stick–slip vibration, which negatively affects drilling performance, tool integrity and completion time, and costs. Attempts to ... -
Gear Tooth Crack Detection Using Modal Analysis
Mohammed, Omar D.; Sassi, Sadok ( IEEE , 2022 , Conference Paper)This paper aims to propose an experimental method to detect and quantify the existence of cracks in spur gear teeth using modal analysis. Frequency Response Functions FRFs obtained analytically in previous work are considered ... -
Hybrid fuzzy sliding mode for stick-slip suppression in drill string systems
Krama, Abdelbasset; Gharib, Mohamed; Refaat, Shady S.; Sassi, Sadok ( Korean Society of Mechanical Engineers , 2022 , Article)Stick-slip vibration is one of the main factors that contribute greatly to reducing the service life of drill string equipment and decreasing the efficiency of the overall drilling system. Thus, it would be very desirable ... -
Investigating the characteristics of a magnetorheological fluid damper through CFD modeling
Badri, Yousif; Syam, Thaer; Sassi, Sadok; Hussein, Mohammed; Renno, Jamil; Ghаni, Sаud... more authors ... less authors ( Institute of Physics Publishing , 2021 , Article)Computational Fluid Dynamics (CFD) analysis is conducted on mono-tube vehicle MRF damper investigated experimentally in a previous study. In this study, the fluid of the type MRF-132DG was inserted inside a damper of a car ... -
Modal analysis of spur gears for varied teeth root cracks characteristics: finite element analysis (FEA) simulations
Syam, Thaer; Badri, Yousif; Sassi, Sadok; Renno, Jamil ( Extrica , 2022 , Conference Paper)Gear failure is considered the main alarming and undesirable event in gearboxes. Usually, cracks happen by fatigue caused due to cyclic loading. Fatigue stress is focused on the teeth root because of the small tooth fillet ... -
Modelling wave behaviour of elastic helical waveguides
Renno, Jamil; Sassi, Sadok; Paurobally, Mohammad R. ( Springer Nature , 2020 , Conference Paper)Curved and straight waveguides are ubiquitous in engineering structures. For modelling these structures in the mid-frequency and high-frequency range, the knowledge of the wave behaviour can be greatly beneficial. This ... -
Numerical simulation of one-stage gearbox dynamics in the presence of simultaneous tooth cracks
Mohamed, Ahmed; Sassi, Sadok; Paurobally, Mohammad Roshun ( International Institute of Acoustics and Vibration, IIAV , 2017 , Conference Paper)Gears are vital components in various industrial machinery. Tooth fatigue crack is amongst the most common causes of gear failure. Early detection of tooth cracks is crucial for effective con-dition-based monitoring. This ... -
On the Suitability of Vibration Acceptance Criteria of Process Pipework
Shady, Omar Tawfik; Renno, Jamil; Mohamed, M. Shadi; Sassi, Sadok; Muthalif, Asan G.A. ( Hindawi , 2022 , Article)The risk of vibration-induced fatigue in process pipework is usually assessed through vibration measurements. For small-bore pipework, integrity personnel would measure the vibration of the pipework and refer to widely ... -
Thermal Structural Optimization of IC Engine Piston
Badri, Yousif; Shamseldin, Ahmed; Renno, Jamil; Sassi, Sadok ( International Journal of Mechanical Engineering and Robotics Research , 2021 , Article)The primary purpose of this work is to investigate the effect of the piston crown and piston boss thicknesses on the stresses generated on the piston. A 150-cc piston, made from A4032 Aluminum, of type “Bajaj,” was considered ... -
Towards a simplified technique for crack recognition in gearing systems
Syam, Thaer; Badri, Yousif; Abdallah, Omran; Sassi, Sadok; Renno, Jamil; Mohammed, Omar D.... more authors ... less authors ( Academie des sciences , 2022 , Article)This paper presents a simple and effective method to identify and quantify the existence of cracks in the teeth roots of spur gears. The problem was numerically analyzed through finite element-based simulation with SolidWorks ... -
Using image processing techniques in computational mechanics
Stephen, Trent; Renno, Jamil; Sassi, Sadok; Mohamed, M. Shadi ( Elsevier , 2023 , Article)The implementation methods of finite element analysis (FEA) have remained essentially unchanged since the inception of FEA in the 1960s. Alterations of any of the input or design parameters to the FEA model can potentially ... -
Using one dimensional convolutional neural networks for classifying the vibration of process pipework
Mohamed, Ahmed S.; Shady, Omar T.S.M.; Renno, Jamil; Sassi, Sadok; Paurobally, Mohamed R. ( AIP Publishing , 2023 , Conference Paper)Pipework in process facilities such as oil and gas or petrochemical plants is subjected to various dynamic excitations. Such excitations may include flow-induced forces due to turbulence or due to change in flow momentum ... -
Vibration of Periodic Drill-Strings with Local Sources of Resonance
Akl, Wael; Alsupie, Hajid; Sassi, Sadok; Baz, Amr M. ( Multidisciplinary Digital Publishing Institute (MDPI) , 2021 , Article)A new class of drill-strings is proposed for attenuating undesirable vibrations to ensure effective operation. The drill-string is provided with passive periodic inserts, which are integrated with sources of local resonance ...