Dear friends, We have many news for our authors and our readers. First of all, due to the high number of submissions, it was necessary to deeply transform the organization of the Journal. We canceled the board of Associate Editors. In these years, the members of this board did great work, continuously suggesting new ideas to further improve the journal and we are deeply grateful to Alfredo Navarro, Thierry Palin Luc, Luca Susmel and John Yates for their service for FIS. Now, we created some sections and, for the next submissions, all the authors will be asked to choose a section during the submission process. We activated a “Section Editor panel” that will actively help the Editor in Chief and we wish to welcome the Section Editors, Marco Boniardi, Nicola Bonora, Milos Djukic, Stavros Kourkoulis, Liviu Marsavina, Pedro Moreira: we are sure that their contribution will help the journal to achieve new and better results. In addition, we wish to welcome the new Co-Editor in Chief, Filippo Berto: his experience in the editorial processing and managing will let great improvements. Among the new services, we can remember: - The activation of the “Categories”: all the published papers are now categorized with one category at least and, selecting one of the categories available under the section “Browse” in the journal website, all the readers will be able to find immediately the papers focused on the selected category; - Visual Abstracts: all the visual abstracts are both linked to the corresponding papers and are also available in the dedicated YouTube channel. Now, in the YouTube channel, each Visual Abstract will be linked to the paper with the keywords as Tags, improving in this way the visibility both of Visual Abstracts and papers. Considering that FIS is characterized by many innovative features, we decided to activate a new page of the website where all these features are collected: https://www.fracturae.com/index.php/fis/Innovation. Please do not hesitate to send us your suggestions.
Ouadia Mouhat, Abdelmajid Bybi, Ahmed El Bouhmidi, Mohamed Rougui
In this paper, gradual demand for curved, stiffened panels composite emerged from carbon fiber reinforced plastics (CFRP); these are structures that are frequently used in aerospace engineering. Up to 50% of the primary structure of the…
In the present work, the stress intensity factor (SIF) of embedded small cracks placed at the weld toe is calculated by means of two procedures based on the Oore-Burns integral. In the first approach, the defect is considered as a circular…
To design and evaluate the analytical crack propagation of a specimen under dynamic load, measurement of dynamic fracture parameters is necessary. However, analytical methods have significant complexity, and experimental methods are also…
The detachment plates 2024T3 by an Araldite adhesive is studied in this work by using the finite element method to predict the damage in traction and compression behavior under the effect of geometrical parameters such as the lap length…
In this paper, a finite element simulation of nonlinear elasto-plastic deformations of Reissner-Mindlin bending plates is described. The previously proposed four-node Q4g element with transverse energy of shearing for thick bending plates…
In this scientific work, a new shear deformation theory for free vibration analysis of simply supported rectangular functionally graded plate embedded in an elastic medium is presented. Due to technical problems during the fabrication…
This study aimed to apply sandwich panel in a two-story steel building to improve its behavior. Sandwich concrete panels consist of three basic components including wires, insulating layer and concrete cover. This research studied the…
The volume fraction effect of carbon fiber in an epoxy matrix in the vicinity of the notch on the traction and torsion behavior were studied. This volume fraction which increases with the reduction of the thickness is a parameter which…
Pulsed thermography is an active non-destructive technique which uses optical excitation source to stimulate heating of the object under investigation. This work is devoted to the simulation of the pulsed thermography method in a steel…
Slow strain rate stress corrosion test of X80 steel in the natural seawater are carried out to study to effect of dissolved oxygen on the sensitivity of stress corrosion. Scanning electron microscope (SEM) combined electrochemical…
Amal TIJANI, Meryam Meknassi, Hassan Chaffoui, Mohamed El Ghorba
In this work, we investigate the behavior of wire ropes subject to corrosion damage. The method is based on accelerated corrosion. Decreasing ultimate force and a loss in rigidity was observed from the static tensile tests made on the…
The stress-strain state analysis of the gas turbine engine compressor disk was carried out taking into account damage accumulation under various loading conditions in the temperature range. Characterization of the constraint effects was…
Volodymyr Iasnii, Petro Yasniy, Denys Baran, Anna Rudawska
The influence of temperature on the fatigue properties of pseudoelastic NiTi under low-cycle fatigue are investigated. Tests were performed under the uniaxial tensile deformation (pull-pull) at 0°С and 20°С which is above the austenite…
Mikhail Olegovich Eremin, Igor Smolin, Alexey Kulkov, Valentina Mikushina
Experimental loading and FEM simulation-based approach at macroscale are utilized to investigate the failure mechanisms of Al2O3 ceramics. Experimental characterization of microstructure is carried out using SEM. Recently the microscale…
Due to their severe operating conditions, many industrial components are subjected to complex combinations of cyclic mechanical stresses and thermal pressures. These combinations are responsible for the initiation and propagation of…
In this paper, an additional criterion was introduced to evaluate the composite repair systems using the limit load analysis. The plastic collapse pressure of API 5L X65 PSL2 steel pressure vessel structure with crack defect is numerically…
He Zi Shou, Qijun Hu, Junsen Zeng, Leping He, Hexi Tang, Bingsheng Li, Shunzhang Chen, Xirui Lu
To investigate the deterioration of granite under microwave irradiation and heat transfer, granite specimens were heated up to 400-1000 °C and then kept for 15 min. Uniaxial compressive strength testing results demonstrate a similar…
Mohammed Baghdadi, Boualem Serier, Mokadem Salem, Bouchra Zaoui, Khacem Kaddouri
In this work the finite element method was used to analyse the composite patch shape effect of the repair performance. Unlike all the works done conducted so far in this domain, this work proposed here, takes into account the reducing…
Israel Gleybson Ferreira da Silva, Arnaldo Homobono Paes de Andrade, Waldemar Alfredo Monteiro
This paper presents a study of the application of Leak-Before-Break (LBB) to nuclear piping using three different materials. Based on the fracture mechanics, the LBB concept considers that a leakage from a crack can be detected before it…
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…
Mahmoud Ameri, Mehdi Nemati, Hamid Shaker, Faezeh jafari
Abstract. In the recent decades, different kinds of fiber materials are used for improving the asphalt mixture performance. Meanwhile, different kinds of fiber are used excessively due to their desirable physical and chemical properties…
The objective of this work is to analyze some geometrical effect to predict the damage of aluminum 2024T3 structure after validate numerical model by experimental test. The mechanical of damage behaviour under tensile tests of several…
Carla Cristiane Silva, Rodrigo Barreto Caldas, Ricardo Hallal Fakury, Hermes Carvalho, João Victor Fragoso Dias
Continuous composite beams may suffer a global instability know as lateral distortional buckling (LDB). The design code EN 1994-1-1:2004 provides a procedure for the verification of this ultimate limit state, in which the resistant bending…
Sebastião Salvador Real Pereira, Hermes Carvalho, João Victor Fragoso Dias, Victor Roberto Verga Mendes, Pedro Aires Montenegro
This paper presents a case study on the behavior of precast reinforced columns with non-conventional cross-section. An experimental program was developed to verify the serviceability and ultimate limit states of these columns, loaded with…
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…
Leping He, Yucheng Gu, Qijun Hu, Yuan Chen, Junsen Zeng
The effects of high temperature induced by microwave radiation on the schistosity structural rock were investigated. A 1.45 kW commercial microwave system was employed to irradiate specimens to a designed temperature (300–800 °C) for 15…
Luca Romanin, Paolo Ferro, Alberto Fabrizi, Filippo Berto
Inconel 625 is a nickel-based superalloy that finds application in many industrial sectors thanks to its high strength, excellent fabricability, and outstanding corrosion resistance. It is characterized by a good weldability and often used…
TThe supports of out-of-plane loaded unreinforced masonry walls in buildings are subjected to a motion that is filtered and amplified by the building structure and, in some cases, can be significantly different from the ground motion.…
The effect of corrosion environment aggressiveness on the tensile mechanical properties degradation of AA2024-T3 was investigated. Tensile specimens were pre-corroded for various exposure times to different corrosive solutions, i.e.…
Limit equilibrium engineering analysis needs the incorporation of probabilistic approaches for the determination of soil strength statistical measures for deterministic and probabilistic analyses. For the commonly used Mohr–Coulomb…
This work aims at investigating the mechanisms activated during the extraction of titanium bars from a marble volume (pull-out phenomenon), used for rejoining fragmented marble structural members at the monuments of the Acropolis of…
Stamatia Gavela, Nikolaos Nikoloutsopoulos, George Papadakos, Dimitra Passa, Anastasia Sotiropoulou
The objective of the study is to introduce an experimental uncertainty budget process for concrete compressive strength test, based on a protocol that incorporates effects of multiple factors significant for the measurement result.…
Two series of uniaxial and triaxial compression tests including unloading-reloading cycles were performed under different confining pressures, in order to study the stress-strain and the deformation behavior of a pozzolanic lime mortar…
In the present work the temperature profile variations generated in rectangular specimens built using the Fused Deposition Modeling (FDM) process, at different printing speeds and orientations, were investigated. The temperature recordings…
Victor Kytopoulos, Emilios Sideridis, John Venetis, Chrysoula Riga, Alexandros Altzoumailis
An experimental technique is presented to evaluate mechanical and thermal load-induced microstructural damage, based on the Electron Probe Micro-Analysis (EPMA) principle, by which certain analytical potentialities of Scanning Electron…
The corrosion behavior of 304L stainless steel rebars in an alkaline solution simulating new concrete subjected to acid rain attack and a mildly to slightly acidic solution simulating corroded cover concrete that exposed the reinforcement…
An experimental investigation of the mechanical and fracture characteristics of Portland limestone and Corsehill sandstone is undertaken, aiming at enhancing understanding of the structural behaviour of these natural building stones…
General formulae for double initial and caustic curves (reflected and transmitted) are obtained in the case of smooth contact of two cylindrical elastic bodies of arbitrary radii. Namely, based on the method of reflected and transmitted…
Niki Martini, Vaia Koukou, George Fountos, Ioannis Valais, Ioannis Kandarakis, Christos Michail, Athanasios Bakas, Eleftherios Lavdas, Konstantinos Ninos, Georgia Oikonomou, Lida Gogou, George Panayiotakis
The aim of this study was to investigate the modulation transfer function (MTF) and the effective gain transfer function (eGTF) of a non-destructive testing (NDT)/industrial inspection complementary metal oxide semiconductor (CMOS)…
In this paper the bombardment of the Constantinople Theodosian Walls by the great cannon of Orban is numerically reproduced deploying Structural Mechanics. Overall gun dimensions were assessed based on historical reports, whereby, the…
Ioannis Papantoniou, Helena Kyriakopoulou, Dimitrios Pantelis, Dimitrios Manolakos
Aluminium foams, produced by powder metallurgy process, have significant potential applications for uses in weight-sensitive structural parts. Problems in the production of metal foams arise from the lack of knowledge in the control of…
Soundless chemical demolition agents (SCDAs) have been used during the last decades in the demolition of boulders and concrete structures as well as in open-surface and sub-surface rock excavation, as an alternative to the use of…
Georgios Seretis, Aikaterini Polyzou, Dimitrios Manolakos, Christopher Provatidis
In this study, a multi-parameter analysis, using Taguchi method for design of experiments, has been conducted to investigate the optimum curing conditions for GNPs/E-glass fabric/epoxy laminated nanocomposites. The independent variables in…
Michail Papachristoforou, Vasilios Mitsopoulos, Maria Stefanidou
In this paper, fly ash, ladle furnace slag and limestone filler were utilized in concrete used as material for additive manufacturing (3D printing). Fly ash and ladle furnace slag were used as a replacement of cement (30% wt.) and…
Marble specimens are subjected to a specially designed stepwise loading protocol, in an attempt to detect fracture precursor phenomena taking advantage of Acoustic Emission (AE) data. The analysis is carried out in terms of the number of…
In this work, the effects of chloride-induced corrosion on tempcore B400c and B450c steel grades are evaluated, in terms of corrosion resistance and mechanical characteristics, after the performance of Tensile and Low Cycle Fatigue…
The experience gathered during the implementation of long series of laboratory experimental protocols, aiming to study the mechanical response of restored structural elements, is summarized. Conclusions are drawn concerning the proper…
The spatiotemporal evolution of damage in marble specimens under uniaxial compression is monitored using Pressure Stimulated Currents (PSCs) and Acoustic Emissions (AEs). The novelty of the study is the use of an integrated grid of…
Nikolaos Fountas, Angelos Koutsomichalis, John Kechagias, Nikolaos Vaxevanidis
Machinability of engineering materials is crucial for industrial manufacturing processes since it affects all the essential aspects involved, e.g. workload, resources, surface integrity and part quality. Two basic machinability…
Fernando Ventura Antunes, Micael Frias Borges, Pedro Prates, Ricardo Branco, Marta Oliveira
Abstract. Fatigue crack growth (FCG) depends on loading, geometry and also material properties. Since FCG is supposedly linked to crack tip plastic deformation, material’s yield stress, Y0, is an important parameter. The main objective…
José Manuel Vasco Olmo, F.A. Díaz, F.V. Antunes, M.N. James
The current work presents an experimental study on the use of the crack tip opening displacement (CTOD) to evaluate its ability to characterise fatigue crack growth. A methodology is developed to measure and to analyse the CTOD from…
Racim Boutelidja, Abdelmoumene Guedri, Mohammed Amine Belyamna, Bachir Merzoug
This work is based on the application of probabilistic fracture mechanics (MRP) models to predict the reliability of pressure pipelines in nuclear power reactors. The simulation of cracking of stainless steel piping under the conditions of…
Sidi Mohammed Amine Khiat, Ramdane Zenasni, Mawloud Hamdi
The present paper proposes a strength model for unidirectional composites with Lin/Epoxy. The model assumes that, a central core of broken fibers flanked by unbroken fibers which are subject to stress concentrations from the broken fibers.…
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…
Kulbir Singh, Christian Robertson, Arun Kumar Bhaduri
Radiation effects lead to significant reduction in ductility during the life of the components used in nuclear reactors. Sharp change in fracture toughness at lower temperature in Body Centered Cubic (BCC) materials as compared to Face…
The monitoring of a heat dissipation process can give an important information about kinetics of deformation process and current crack propagation rate. The work is devoted to the theoretical and experimental study of the problem. The…
This paper discusses the phase shift effect occurring between two and more load channels of multiaxially loaded specimens. The discussion concludes that there is an extreme shortage of good experimental data that would prove the existence…