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Effect of date palm and polypropylene fibers on the characteristics of self-compacting concretes: comparative study

Dounia Derdour, Mourad Behim, Mohammed Benzerara

This article presents the results of a comparative experimental study on the influence of date palm fibers to replace polypropylene fibers used as reinforcement in self-compacting concrete (SCC). Indeed, the use of polypropylene fibers…

Experimental contribution to the study of the physic-mechanical behavior and durability of high-performance concretes based on ternary binder (cement, silica fume and granulated blast furnace slag)

Ouahab Rahim, Djamel Achoura, Mohammed Benzerara, Céline Bascoulès-Perlot

Le béton à hautes performances (BHP) est un béton innovant largement utilisé dans la construction moderne. De nouvelles techniques de formulation et de conception du HPC ont permis d'obtenir des performances mécaniques et une durabilité…

Effect of concrete cover thickness and main reinforcement ratio on flexural behavior of RC beams strengthened by NSM-GFRP bars

Hesham EL-Emam, Alaa El-Sisi, Ramy Reda, Mohamed Bneni, Mohamed Seleem

Experimental and numerical programs were invoked to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric…

The concept of the average stress in the fracture process zone for the search of the crack path

Yu.G. Matvienko, M.M. Semenova

The concept of the average stress has been employed to propose the maximum average tangential stress (MATS) criterion for predicting the direction of fracture angle. This criterion states that a crack grows when the maximum average…

Plastic zone evolution near a crack tip and its role in environmentally assisted cracking

Jesús Toribio, Viktor Kharin

This paper analyzes the effects of crack tip plastic strains and compressive residual stresses, created by fatigue pre-cracking, on environmentally assisted cracking of pearlitic steel subjected to localized anodic dissolution and hydrogen…

Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete

Kheira Camellia Nehar, Dalila Benamara

Concrete, a material of prime importance, is widely used in various works. Among the raw materials composing concrete, aggregates come first. It is widely acknowledged that the consumption of natural aggregates increases with the growth in…

Effect of different environmental conditions on surface crack growth in aluminum alloys

V. Shlyannikov, R. Yarullin, I. Ishtyryakov

Fatigue surface crack growth is studied through experiments and computations for aluminum alloys D16T and B95AT (analogue of 2024 and 7075 aluminum). Subjects for studies are cylindrical hollow specimens with external semi-elliptical…

Fatigue crack behavior on a Cu-Zn-Al SMA

V. Di Cocco, F. Iacoviello, S. Natali, V. Volpe

In recent years, mechanical property of many SMA has improved in order to introduce these alloys in specific field of industry. Main examples of these alloys are the NiTi, Cu-Zn-Al and Cu-Al-Ni which are used in many fields of engineering…

Influence of 3d-printing parameters on the mechanical properties of 17-4PH stainless steel produced through Selective Laser Melting

Francesca Romana Andreacola, Ilaria Capasso, Letizia Pilotti, Giuseppe Brando

Additive Manufacturing (AM) is a technological process in which elements are fruitfully built up adding materials layer by layer. AM had a massive development in recent times, thanks to its intrinsic advantages, especially if compared with…

Influence of different loading paths on the multiaxial fatigue behavior of 2024 aluminum alloy under the same amplitude values of the second invariant of the stress deviator tensor

Andrey Yankin, A.I. Mugatarov, V.E. Wildemann

2024 aluminum alloy is a common aeronautic material. During operations, construction elements made of aluminum alloys undertake complex cyclic loadings. Therefore, it is important to estimate the influence of these loadings on the…

Fatigue crack paths and properties in A356-T6 aluminum alloy microstructurally modified by friction stir processing under different conditions

A. Tajiri, Y. Uematsu, T. Kakiuchi, Y. Suzuki

A356-T6 cast aluminum alloy is a light weight structural material, but fatigue crack initiates and propagates from a casting defect leading to final fracture. Thus it is important to eliminate casting defects. In this study, friction stir…

Effect of external operational damage on the mechanical behavior of GFRP under quasi-static and fatigue loading

Anastasia Lykova, D.S. Lobanov, A.M. Pankov

An experimental study was conducted to investigate the influence of operational defects, such as surface scratches and dents, on the residual mechanical properties of glass fiber-reinforced plastic (GFRP) during quasi-static tensile and…

Application of Machine Learning in Fracture Analysis of Edge Crack Semi-Infinite Elastic Plate

Saeed Hossein Moghtaderi, Alias Jedi, Ahmad Kamal Ariffin, Prakash Thamburaja

This paper discusses the application of machine learning techniques, notably artificial neural networks (ANN), in the fracture analysis of semi-infinite elastic plates with edge cracks. The Stress Intensity Factor (SIF) model for a…

Mixed Finite Element Computation of Energy Release Rate in Anisotropic Materials Based on Virtual Crack Closure-Integral Method

Sami Derouiche, Salah Bouziane, Hamoudi Bouzerd

The material with anisotropic properties are becoming widely essential due to the ease to manipulate their mechanical properties in order to obtain a particular quality, insure safety or a specific behavior. Those kind of materials are…

Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses

Maria Giovanna Masciotta, Daniele Pellegrini, Daniele Brigante, Alberto Barontini, Paulo B. Lourenço, Maria Girardi, Cristina Padovani, Giovanni Fabbrocino

This paper aims to explore the dynamic behavior of a segmental masonry arch subjected to increasing horizontal displacements of one support. To this end, output-only dynamic identification techniques are first used to track the evolution…

The effect of creep damage formulation on crack tip fields, creep stress intensity factor and crack growth assessments

V. Shlyannikov, A. Tumanov

Fields of stress, strain rate and process zone of a mode I creep crack growth are analyzed by employing damage evolution equations. Damage models for fracture of process zone represented by stress based formulation. Two expressions are…

Can Delta Keff be assumed as the driving force for fatigue crack growth?

J.T.P. Castro, M.A. Meggiolaro, J.A.O. González

This work raises some new questions about the validity of blindly assuming that Elber’s effective stress intensity factor is the actual fatigue crack driving force, and that as so it can be used to explain all load sequence effects on…

Process of cracking in reinforced concrete beams (simulation and experiment)

I. N. Shardakov, A. P. Shestakov, I.O. Glot, A.A. Bykov

The paper presents the results of experimental and theoretical investigations of the mechanisms of crack formation in reinforced concrete beams subjected to quasi-static bending. The boundary-value problem has been formulated in the…

Metastability, adiabatic shear bands initiation and plastic strain localization in the AMg6 alloy under dynamic loading

Mikhail Sokovikov, Sergey Uvarov, Mikhail Simonov, Vasiliy Chudinov, Oleg Naimark

New conception of adiabatic shear bands (ASB) and adiabatic shear failure mechanisms are proposed as special type of critical phenomen, structural-scaling transition, in the ensembles of microshears, governed by the characteristic…

Failure analysis of compressed earth block using numerical plastic damage model

Samir Bouhiyadi, Laidi Souinida, Youssef El hassouani

In the last decade, several studies have been introduced to the development and use of compressed earth blocks in green building construction. Studying the evaluation of existing cracks in construction builders by these blocks is an…

Numerical modeling of bending, buckling, and vibration of functionally graded beams by using a higher-order shear deformation theory

Nabil Hebbar, Imène Hebbar, Djamel Ouinas, Mohamed Bourada

The objective of this work is to analyze the behavior beams functionally graded, simply supported, under different conditions such as bending, buckling, and vibration and this by use shear deformation theories a two-dimensional (2D) and…

Coupled identification of the hardening behavior laws and Gurson–Tvergaard–Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen

Mohamed Hadj Miloud, Ibrahim Zidane, Mohammed Mendas

This work is devoted to the application of the micromechanical Gurson-Tvergaard-Needleman (GTN) model to study the ductile tearing of 12NiCr6 steel. GTN model is widely used to describe the three stages of ductile tearing: nucleation…

Fracture toughness and failure mechanism of high performance concrete incorporating carbon nanotubes

Anwar Khitab, Sajjad Ahmad, Rao Arsalan Khushnood, Syed Ali Rizwan, Giuseppe Andrea Ferro, Luciana Restuccia, Mustajab Ali, Imran Mehmood

Cement and concrete composites are inherently brittle and exhibit very less tensile/flexural strength capacity as compared to their compressive strength. Use of thoroughly dispersed carbon nanotubes in the concrete matrix is one of the…

Experimental fracture resistance study for cracked bovine femur bone samples

M.R.M. Aliha, Hussein Ghazi, Farkhondeh Ataei

Crack growth and brittle fracture is one of the major failure modes in bone materials and therefore understanding the fracture behavior and affecting parameters on the crack growth resistance of bone is necessary for biomechanics…

Numerical simulation of a crack emanating from a micro-cavity in the orthopedic cement by technical sub modeling of total hip prosthesis

Sahli Abderahmane, Ait Kaci Djafar, Zahi Rachid, Moulgada Abdelmadjid, Benbarek Smail

PMMA has important micro structural heterogeneities such as cavities, and its elastic behavior is greatly affected by the presence of defects that may imply its weakening and cause failure. In areas of high concentrations of stress and due…

Performance Index of Natural Stones-GFRP Hybrid Structures

Luca Sorrentino, Costanzo Bellini, Wilma Polini, Sandro Turchetta

Natural stone is a material that presents durableness over time and high aesthetic characteristic, but it is brittle and its tensile strength is significantly lower than compressive one: these peculiarities must be taken into account for…

Modeling subgrain structure evolution during heat treatment

Nikita Kondratev, Dmitry Bezverkhy, Matvej Baldin

This paper presents a novel modification of the multilevel statistical model for describing the subgrain boundary migration that can explicitly account for the topology of subgrain structures in the form of Laguerre polyhedra. The…

An Investigation on the Free Vibration Behaviors of Additively Manufactured PA6 Layered Plates: Influences of Stacking Sequence, Infill Ratio, and Boundary Conditions

Sinan Maraş, Çağın Bolat

This study investigates the free vibration behavior of 3D-printed PA6 layered plates by considering the effects of stacking sequence, infill ratio, and boundary conditions. Unlike previous works, this research provides a comprehensive…

Effectiveness of Partial Wrapping of Stainless-Steel Wire Mesh on Compression Behavior of Concrete Cylinders

Sunil Raiyani, Paresh Patel, S Suriya Prakash

Partial confinement can provide sufficient reinforcement to enhance the compressive strength and ductility of concrete with lesser confining material. This paper presents the results of an axial compression test conducted on eighteen plain…

Effect of parent concrete strength on recycled concrete performance

Bachir Kebaili, Mohammed Benzerara, Souad Menadi, Nadia Kouider, Redjem Belouettar

The reuse of concrete waste as a secondary aggregate could be an efficient solution for sustainable development and long-term environmental protection. However, the variable quality of waste concrete, especially with various compressive…

Structural and seismic vulnerability assessment of the Santa Maria Assunta Cathedral in Catanzaro (Italy): classical and advanced approaches for the analysis of local and global failure mechanisms

Fabrizio Greco, Daniele Gaetano, Lorenzo Leonetti, Paolo Lonetti, Arturo Pascuzzo, Aurora Skrame

The evaluation of the seismic vulnerability of existing buildings is becoming very significant nowadays, especially for ancient masonry structures, that represent the cultural and historical heritage of our countries. In this research, the…

Analysis of static response of RC beams with NSM CFRP/GFRP rods

Erica Magagnini, Roberto Capozucca, Maria Vittoria Vecchietti

In this paper experimental results of investigation on reinforced concrete (RC) beams strengthened with the near surface method (NSM) are analyzed considering the response under bending tests on two beams. One of the RC beams was damaged…

Crack growth based life prediction approach under LCF-HCF interaction

Aritra Sarkar, M. Okazaki, A. Nagesha, R. Sandhya

Prediction of cyclic life under low cycle fatigue - high cycle fatigue (LCF-HCF) interaction is of paramount importance in the context of structural integrity of components in the primary side of fast reactors where such damage under…

Numerical model of cracking pattern in laminated bamboo specimens under tensile and shear loads

Martín Estrada, Dorian L Linero, Caori P Takeuchi

This work describes a two-dimensional numerical model that allows detecting the appearance of cracks and calculating their propagation in elements made of laminated bamboo, under tension and shear. This composite material has long parallel…

Effects of Ni-P + DLC multilayer coating on cavitation erosion behavior of AlSi10Mg produced by laser powder bed fusion

Maria Beatrice Abrami, Lorenzo Montesano, Marialaura Tocci, Gianluca Di Egidio, Annalisa Pola

Additive manufacturing (AM) technologies are currently contributing to significant progress in the design of lightweight metal components. Al alloys constitute the most studied light metal, particularly the Al-Si ones, due to their high…

Behavior of steel columns with double curvature: a numerical simulation and design-oriented parametric study

Hamda Guedaoura, Mohammed Benzerara, Nadia Gouider, Yazid Hadidane, Anfel Chaima Hadidane

This research present a novel investigation, which focuses on the numerical exploration of steel columns having a double curvature, built with both hollow square and circular cross-sections. A finite element model was initially created…

Experimental studies to evaluate tensile and bond strength of Stainless-Steel Wire Mesh (SSWM)

Paresh Patel, Digesh Joshi, Rinkesh Makawana

Structural strengthening is vital to improve the load-carrying capacity partially or severely damaged Reinforced Concrete (RC) elements. Fiber Reinforced Polymers (FRPs) are widely used for strengthening purposes. In this study, use of…

Review of Current Developments on High Strength Pipeline Steels for HIC Inducing Service

Ehsan Entezari, Jorge Luis González-Velázquez, Diego Rivas López, Manuel Alejandro Beltrán Zúñiga, Jerzy A. Szpunar

Nowadays, an increasing number of oil and gas transmission pipes are constructed with high-strength low alloy steels (HSLA); however, many of these pipelines suffer from different types of hydrogen damages, such as hydrogen-induced…

A Determination of fracture toughness in plain concrete specimens by R curve

Hamza Chbani, Bouchra Saadouki, Mostapha Boudlal, Mohamed Barakat

Since the last two centuries, concrete has become the number one building material in the world. Therefore, we are interested in studying the mechanical behavior at failure of this material and calculate its toughness. In this paper, we…

Experimental methods for the characterization of fatigue in microstructures

G. De Pasquale, A. Somà

The mechanical fatigue behavior of gold microbeams is analyzed. Dedicated devices have been designed and built able to produce alternate loading on gold specimens; the electrostatic actuation is used as driving force. Gold beams are tested…

Optimization of the internal structure of 3D-printed components for architectural restoration

Valentina Tomei, Ernesto Grande, Maura Imbimbo

In recent years, 3D printing technology has assumed an important role in advanced construction processes across various engineering fields. Among these, the application to the architectural restoration of historic structures is…

Experimental and numerical investigations of masonry ‎ beams performance under bending loads

Samarsamy Hamed, Mohamed Husain, Mahmoud Zaghlal, Alaa El-Sisi

An experimental and numerical study was achieved to investigate the behavior of masonry beams internally reinforced using carbon fiber-reinforced polymer (CFRP) and hybrid steel/CFRP reinforcements. In addition, the use of masonry…

Structural behavior of damaged reinforced concrete beams under static cyclic loading

Abdelrahman Elbaz, H. Marzouk, Kh. Heiza, Omar Elnawawy

Bridges are regarded as one of the most important components of transportation infrastructure. More and more repairs, inspections, alterations, and construction processes are required to maintain safe usage due to increasing travel demands…

Recycling of plastic waste polyethylene terephthalate (PET) as a modifier in asphalt mixture: study of Creep-Recovery at Low, Medium, and Hot Temperatures

Amine Bekhedda, M’hammed Merbouh

One environmental problem in most countries is the huge quantities of plastic waste, which has different types of polymers such as polyethylene terephthalate (PET), polypropylene (PP)., These plastics become a problem because of their…

Fatigue loading characteristic for the composite steel-concrete beams

Ahmed I.Hassanin, Hesham M. Fawzy, Ahmed I. Elsheikh

During the past few decades, composite beams (steel I beam and concrete slab) have had a wide range of uses, particularly in bridge construction. This is due to its relatively low economic cost compared to individual steel structures or…

Experimental Research on Fracture Behavior of Concrete after High Temperature

Peng Qiu

High-strength concrete has been widely used in various complex buildings. The fracture and mechanical properties of high-strength concrete after fire have great research value. Based on the double K fracture model, the fracture properties…

Enhancement of punching shear behavior of reinforced concrete flat slabs using GFRP grating

Ahmed Mahmoud, Haitham F. Mostafa, Tarek S. Mostafa, Ahmed N. Khater

The literature review showed insufficient relevant research on the application of Glass-Fiber-Reinforced-Polymers (GFRP) gratings in the structural elements, while GFRP bars, laminate, sheets, and strips, have been extensively explored.…

High-quality nodule analysis in spheroidal graphite cast iron using X-ray micro-computed tomography

This work is a continuation of the studies presented in a recent paper by the authors, where a methodology to obtain different nodule quality categories in spheroidal graphite cast iron, was proposed. In this study, an exhaustive analysis…

Crack prediction in beam-like structure using ANN based on frequency analysis

Meriem Seguini, Nedjar Djamel, Boutchicha Djilali, Samir Khatir, Magd Abdel Wahab

The dynamic experimental and numerical analysis of cracked beams has been studied with the aim of quantifying the influence of depth crack on the dynamic response of steel beams. Artificial Neural Method ANN has been used where a numerical…

3D limit analysis of masonry pavilion domes on octagonal drum subjected to vertical loads

Carlalberto Anselmi, Filomena Galizia, Eduardo Saetta

Within the framework of limit design applied to masonry structures, this paper aims at analyzing the different behavior of a pavilion dome according to the adopted construction and reinforcement technologies. By using the static theorem…