Smaïl Benbarek

Université Djilali de Sidi Bel Abbès

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B. Bachir Bouiadjra

Université Djilali de Sidi Bel Abbès

B. Sérier

Université Djilali de Sidi Bel Abbès

A. Sahli

Université Djilali de Sidi Bel Abbès

T. Achour

Université Djilali de Sidi Bel Abbès

Ismail Boudjemaa

Université des Sciences et de la Technologie d'Oran Mohamed Boudiaf

Mohamed Mokhtar Bouziane

Université Djilali de Sidi Bel Abbès

Abdelkader Benkhettou

Université Djilali de Sidi Bel Abbès

M. M. Bouziane

Université Mustapha Stambouli de Mascara

Abderahman Sahli

Université Djilali de Sidi Bel Abbès

Steven F. Wayne

University of Memphis

Cooperative Institutions

Université Djilali de Sidi Bel Abbès

Laboratory of Mechanics Physics of Materials

Université Mustapha Stambouli de Mascara

Centre National de la Recherche Scientifique

Université des Sciences et de la Technologie d'Oran Mohamed Boudiaf

Université Oran 1 Ahmed Ben Bella

Centre Universitaire de Relizane

King Saud University

Université de Lille

Université IBN Khaldoun Tiaret

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Comparison of Double- and Single-Bonded Repairs to Symmetrical Composite Structures

Journal of Failure Analysis and Prevention (2018)

A. Benkheira M. Belhouari Smaïl Benbarek

10.1007/s11668-018-0557-7

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Citations (6)

Initiation and propagation of a crack in the orthopedic cement of a THR using XFEM

Advances in Computational Design (2019)

Bachir Gasmi Sahli Abderrahmene Smaïl Benbarek B. Aour

The sealing cement of total hip arthroplasty is the most widely used binder in orthopedic surgery for anchoring implants to their recipient bones. Nevertheless, this latter remains a fragile material with weak mechanical properties. Inside this material cracks initiate from cavities. These cracks propagate under the effect of fatigue and lead to the failure of this binder and consequently the loosening of the prosthesis. In this context, this work consists to predict the position of cracks initiation and their propagations path using the Extended Finite Element Method (XFEM). The results show that cracks can only be initiated from a sharp edges of an ellipsoidal cavity which the ratio of the minor axis over the major axis is equal to 0.1. A maximum crack length of 19 micro m found for a cavity situated in the proximal zone position under a static loading. All cracks propagate in same(almost) way regardless of the cavity(site of initiation) position and its inclination in the proximal zone.

Position (finance)

10.12989/acd.2019.4.3.295

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Citations (3)

Multi-objective optimization of prosthetic multi-cells foam liner

Mechanics of Advanced Materials and Structures (2024)

Abdelkader Benkhettou Omar Khatir Ismail Boudjemaa Abderahman Sahli B. Bachir Bouiadjra

10.1080/15376494.2024.2370035

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Citations (8)

Numerical simulation of the femur fracture under static loading

STRUCTURAL ENGINEERING AND MECHANICS (2016)

Zagane Mohammed El Sallah Smaïl Benbarek A. Sahli B. Bachir Bouiadjra B. Sérier

Bone is a living material with a complex hierarchical structure that gives it remarkable mechanical properties. Bone constantly undergoes mechanical. Its quality and resistance to fracture is constantly changing over time through the process of bone remodeling. Numerical modeling allows the study of the bone mechanical behavior and the prediction of different trauma caused by accidents without expose humans to real tests. The aim of this work is the modeling of the femur fracture under static solicitation to create a numerical model to simulate this element fracture. This modeling will contribute to improve the design of the indoor environment to be better safe for the passengers' transportation means. Results show that vertical loading leads to the femur neck fracture and horizontal loading leads to the fracture of the femur diaphysis. The isotropic consideration of the bone leads to bone fracture by crack propagation but the orthotropic consideration leads to the fragmentation of the bone.

Orthotropic material

Diaphysis

Bone fracture

10.12989/sem.2016.60.3.405

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Citations (9)

Experimental and numerical disbond localization analyses of a notched plate repaired with a CFRP patch

STRUCTURAL ENGINEERING AND MECHANICS (2017)

A. Sahli Bouziane M. Mokhtar Smaïl Benbarek Steven F. Wayne Liang Zhang

Through the use of finite element analysis and acoustic emission techniques we have evaluated the interfacial failure of a carbon fiber reinforced polymer (CFRP) repair patch on a notched aluminum substrate. The repair of cracks is a very common and widely used practice in the aeronautics field to extend the life of cracked sheet metal panels. The process consists of adhesively bonding a patch that encompasses the notched site to provide additional strength, thereby increasing life and avoiding costly replacements. The mechanical strength of the bonded joint relies mainly on the bonding of the adhesive to the plate and patch stiffness. Stress concentrations at crack tips promote disbonding of the composite patch from the substrate, consequently reducing the bonded area, which makes this a critical aspect of repair effectiveness. In this paper we examine patch disbonding by calculating the influence of notch tip stress on disbond area and verify computational results with acoustic emission (AE) measurements obtained from specimens subjected to uniaxial tension. The FE results showed that disbonding first occurs between the patch and the substrate close to free edge of the patch followed by failure around the tip of the notch, both highest stress regions. Experimental results revealed that cement adhesion at the aluminum interface was the limiting factor in patch performance. The patch did not appear to strengthen the aluminum substrate when measured by stress-strain due to early stage disbonding. Analysis of the AE signals provided insight to the disbond locations and progression at the metaladhesive interface. Crack growth from the notch in the aluminum was not observed until the stress reached a critical level, an instant before final fracture, which was unaffected by the patch due to early stage disbonding. The FE model was further utilized to study the effects of patch fiber orientation and increased adhesive strength. The model revealed that the effectiveness of patch repairs is strongly dependent upon the combined interactions of adhesive bond strength and fiber orientation.

Acoustic Emission

10.12989/sem.2017.63.3.361

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Citations (5)

Effect of multi-layer prosthetic foam liner on the stresses at the stump–prosthetic interface

Frattura ed Integrità Strutturale (2021)

Ismail Boudjemaa A. Sahli Abdelkader Benkhettou Smaïl Benbarek

The prosthetic liner plays a significant role in the redistribution of the pressure between the stump and the socket, as it adding a cushioning layer between the stump and the socket which relieves pain and makes the prosthesis more comfortable. This study employed nonlinear finite element analyses to investigate the peak pressure and shear stress at stump–prosthetic interface in the case of multi-layer prosthetic foam liner, this liner having an inner polymeric foam layer Surrounded by another type of polymeric foam layer, we used three different types of foams in different order to define this liner (flexible polyurethane foam, polyurethane-shape memory polymer foam, and natural rubber latex foam). That’s allows comparing 6 deferent configuration of multi-layer prosthetic foam liner.

Cushioning

Foam concrete

10.3221/igf-esis.56.15

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Citations (7)

Influence of porosity on the behavior of cement orthopaedic of total hip prosthesis

Biomaterials & biomedical engineering (2015)

Ali Benouis B. Sérier Smaïl Benbarek

This paper presents three-dimensional finite element method analyses of the distribution of equivalents stress of Von Mises. Induced around a cavity located in the bone cement polymethylmethacrylate (PMMA). The presences and effect of its position in the cement was demonstrated, thus on the stress level and distribution. The porosity interaction depending on their positions, and their orientations on the interdistances their mechanical behaviour of bone cement effects were analysed. The obtained results show that micro-porosity located in the proximal and distal zone of the prosthesis is subject to higher stress field. We show that the breaking strain of the cement is largely taken when the cement, containing the porosities very close adjacent to each other.

Bone cement

10.12989/bme.2015.2.4.197

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Citations (1)

Simulation of a Crack Emanating from a Microvoid in Cement of a Reconstructed Acetabulum

Advanced structured materials (2016)

B. Sérier Leila Zouambi M. M. Bouziane Smaïl Benbarek B. Bachir Bouiadjra

Shearing (physics)

10.1007/978-981-10-1602-8_3

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Citations (1)

Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface

Frattura ed Integrità Strutturale (2021)

Ismail Boudjemaa A. Sahli Abdelkader Benkhettou Smaïl Benbarek

A lot of trans-femoral amputation patients experience skin breakdown due to the pressures and shear stresses in the stump-prosthesis interface. In this study, a finite element model was employed to investigate the stresses at the stump interface in the case of an orthopedic implant fixed to the cut end of the femur. By changing the stiffness of this implant, we aim to see how the stiffness of this implant affects the stresses in the interface between the amputated limb and the prosthesis. To find out the effects of implant stiffness, five values for the elastic modulus, ranging from 0.1 to 0.5 Mpa, with an interval of 0.1 Mpa were employed in the implant structure of the FE model. Obtained results show that the implant played important role in reducing the stresses at the stump-prosthesis interface where the contact pressure did not exceed 53 Kpa and 17.3 Kpa for shear stress in the stiffer case of an implant, while the contact pressure in the case of femur without implant exceeded 79Kpa and 42 Kpa for shear stress. We also noted that the intensity of the contact pressure and the shear stress is proportional to the stiffness of the implant, as the greater the implant stiffness, the higher the peak of these stresses.

Stress shielding

Contact Mechanics

10.3221/igf-esis.57.13

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Citations (3)

Finite Element Analysis of the Mechanical Behaviour of a Reinforced PMMA-Based Hip Spacer

Advanced materials research (2015)

Mohamed Mokhtar Bouziane Husam A. Salah Smaïl Benbarek B. Bachir Bouiadjra B. Sérier

The designs of hip joint prostheses have an influence on both the quality of the metal–bone cement contact and the failure rate of the cement mantle. The designers of implant systems must confront biomaterial and biomechanical problems, including in vivo forces on implants, load transmission to the interface, and interfacial tissue response. Cement spacers are being increasingly used for revision arthroplasties. In this study, a three-dimensional finite elements method is used to analyse the mechanical behaviour of the reinforced spacer out of the bone cement (PMMA) by computing the maximum stress. One of the most important factors in the reinforce design is to reduce the stress on the bone cement and the femur. The static load analysis is based, by selecting the peak load during the normal walking activity. Results show that, Von Mises stress is significantly reduced in the cement bone of full-stem and rod reinforced spacers.

Bone cement

Biomaterial

10.4028/www.scientific.net/amr.1105.36

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Citations (4)