September 2013

Vol. 7, No. 26 (2013)

October 2013

The browsable journal is available at this link

Cara Lettrice, caro Lettore,
utilizziamo queste poche righe per darti qualche novità riguardanti la vita della rivista IGF, ormai arrivata al suo ventiseiesimo numero.
Anzitutto l’acronimo che abbiamo deciso di adottare per la rivista IGF nell’ultima assemblea dei Soci IGF: F&IS. Da oggi questa sarà la denominazione abbreviata di Frattura ed Integrità Strutturale!
Come avrai già notato, abbiamo pubblicato alcuni “numeri dedicati”. Non vogliamo chiamarli “special issue”. Si tratta piuttosto di numeri pubblicati secondo la cadenza normale che, oltre a contenere articoli proposti e revisionati secondo la normale procedura, contengono anche una serie di articoli dedicati ad un argomento oppure ad un evento particolare. Per questi numeri i due Board e gli Editor sono coadiuvati da uno o più Guest Editor. Si tratta, ad esempio, del numero 24 (aprile 2013), dedicato alla Russian Fracture Mechanics School, oppure del numero 25 (luglio 2013), dedicato al Workshop organizzato a Malaga dal titolo Characterization of Crack Tip Stress Field. Quindi, se vuoi proporre una special issue dedicata ad un argomento particolare oppure ad un evento di interesse per la comunità IGF, contattaci!!
Altro evento importante è l’arrivo di un nuovo Associate Editor: Alfredo Navarro Robles della Escuela Superior de Ingenieros, Universidad de Sevilla, Spagna! Siamo certi che con il suo contributo faremo crescere ulteriormente la qualità e la diffusione della rivista IGF.
Infine, e forse questa è la novità più importante, desideriamo comunicarvi che a partire da questo numero sarà possibile inserire dei video all’interno degli articoli e, ovviamente, commentare questi video all’interno del testo dell’articolo. Si tratta di una modalità assolutamente innovativa di divulgazione. A causa della molteplicità di sistemi operativi e di browser, e delle diverse modalità di fruizione dei lavori (desktop, laptop e mobile) inseriremo i video come link multimediali che potranno funzionare in maniera differente in funzione del device, del sistema operativo e del browser.
In corrispondenza delle figure che potranno attivarsi come video troverete queste due icone:

La prima icona (sicuramente funzionate su sistemi Windows desktop), permette di fruire il video in maniera assolutamente interessante: selezionandola si apre infatti il video all’interno di una finestra mobile, che consente di scorrere il testo dell’articolo e visionare contemporaneamente il video (l’icona è collegata ad un file flv). La seconda icona è più utile in altri sistemi operativi (ad esempio Apple-ipad) e permette di fruire i video in una nuova finestra (l’icona è collegata ad un file mp4). E’ da sottolineare che la dimensione del file pdf resta immutata, in quanto i file sono solo collegati ai differenti file. Si tratta evidentemente di una modalità di pubblicazione innovativa che nel prossimo futuro sicuramente vedrà delle evoluzioni. Speriamo che questa novità riscuota il vostro apprezzamento, a presto

Francesco Iacoviello
Direttore F&IS

Published
Contents14 items Sections1 section
Views16,448
Downloads8,749

Table of contents

14 items
Miscellanea Views: 857 Downloads: 498 pp. 01

Investigation via morphological analysis of aluminium foams produced by replication casting

A. Boschetto, L. Bottini, F. Campana, L. Consorti, D. Pilone

Foams and porous materials with cellular structure have many interesting combinations of physical and mechanical properties coupled with low specific weight. By means of replication casting it is possible to manufacture foams from molten…

Miscellanea Views: 1,160 Downloads: 588 pp. Pages 12-21

Graphite nodules features identifications and damaging micromechanims in ductile irons

Alberto De Santis, Daniela Iacoviello, Vittorio Di Cocco, Francesco Iacoviello

Ductile irons mechanical properties are strongly influenced by the metal matrix microstructure and on the graphite elements morphology. Depending on the chemical composition, the manufacturing process and the heat treatments, these…

Miscellanea Views: 2,121 Downloads: 580 pp. Pages 22-30

An experimental study on flexural strength enhancement of concrete by means of small steel fibers

Abdoullah Namdar, Ideris Bin Zakaria, Azimah Bt Hazeli, Sayed Javid Azimi, Abdul Syukor Bin Abd. Razak, G. S. Gopalakrishna

Cost effective improvement of the mechanical performances of structural materials is an important goal in construction industry. To improve the flexural strength of plain concrete so as to reduce construction costs, the addition of fibers…

Miscellanea Views: 984 Downloads: 702 pp. Pages 31-40

Strength on cut edge and ground edge glass beams with the failure analysis method

Stefano Agnetti

The aim of this work is the study of the effect of the finishing of the edge of glass when it has a structural function. Experimental investigations carried out for glass specimens are presented. Various series of annealed glass beam were…

Miscellanea Views: 841 Downloads: 895 pp. Pages 41-48

Failure of steam line causes determined by NDT testing in power and heating plants

Srdjan Bulatovic, Vujadin Aleksic, Ljubica Milovic

This paper examines leakage and damages of steam and provides an overview of NDT testing in order to determine the cause of steam lines failure in power plants and heating plants. This approach may be applied to similar structures and its…

Miscellanea Views: 1,310 Downloads: 892 pp. Pages 49-56

Comparison between dog-bone and Gaussian specimens for size effect evaluation in gigacycle fatigue

A. Tridello, D.S. Paolino, G. Chiandussi, M. Rossetto

Gigacycle fatigue properties of materials are strongly affected by the specimen risk volume (volume of material subjected to a stress amplitude larger than the 90% of the maximum stress). Gigacycle fatigue tests, performed with ultrasonic…

Miscellanea Views: 1,111 Downloads: 527 pp. Pages 57-68

About the certification of railway rails

A. De Iorio, M. Grasso, F. Penta, G.P. Pucillo

When the compliance with the European Code of some rail steel has to be verified, the need of carrying out the experimental activities in accordance with several testing Standards forces the operator both to solve the problems related to…

Miscellanea Views: 1,163 Downloads: 492 pp. Pages 69-79

A four-parameters model for fatigue crack growth data analysis

M. Grasso, F. Penta, P. Pinto, G.P. Pucillo

A four-parameters model for interpolation of fatigue crack growth data is presented. It has been validated by means of both data produced by the Authors and data collected from Literature. The proposed model is an enhanced version of a…

Miscellanea Views: 1,189 Downloads: 571 pp. Pages 80-91

Mode I Stress Intensity Factors for triangular corner crack nearby intersecting of cylindrical holes

E. Salvati, P. Livieri, R. Tovo

The paper deals with the Stress Intensity Factor assessment of cracks at the intersection of holes loaded by internal pressure. Triangular flaws are considered at the intersection of two holes inside a specific specimen. The research…

Miscellanea Views: 1,052 Downloads: 713 pp. Pages 92-103

Coupled FEM-DBEM method to assess crack growth in magnet system of Wendelstein 7-X

R. Citarella, M. Lepore, Joris Fellinger, Victor Bykov, Felix Schauer

The fivefold symmetric modular stellarator Wendelstein 7-X (W7-X) is currently under construction in Greifswald, Germany. The superconducting coils of the magnet system are bolted onto a central support ring and interconnected with five…

Miscellanea Views: 1,498 Downloads: 553 pp. Pages 104-122

Crack of a helicopter main rotor actuator attachment: failure analysis and lessons learned

L. Allegrucci, F. De Paolis, A. Coletta, M. Bernabei

A Light Utility Helicopter (LUH), in the course of a training flight, leaving the ground during the taxi to take off, went into an uncontrolled rolling to the right; consequently the helicopter gradually laid down on the right side. The…

Miscellanea Views: 1,212 Downloads: 643 pp. Pages 123-131

High temperature initiation and propagation of cracks in 12%Cr-steel turbine disks

S. Foletti, A. Lo Conte, S. Salgarollo, F. Bassi, A. Riva

This work aims to study the crack propagation in 12%Cr steel for turbine disks. Creep Crack Growth (CCG) tests on CT specimens have been performed to define the proper fracture mechanics which describes the initiation of the crack…

Miscellanea Views: 1,013 Downloads: 468 pp. Pages 132-142

Behaviour of a speargun with a novel muzzle - Comportamento di un fucile subacqueo con testata innovativa

T. Ingrassia, M. Mucera, V. Nigrelli

The paper presents the results of a numerical and experimental investigation performed on a barrel of a speargun equipped with two kinds of muzzle. In particular, a standard muzzle for speargun (having an elastic propulsion) has been…

Miscellanea Views: 937 Downloads: 627 pp. Pages 143-155

Fatigue characterization of mechanical components in service

G. Fargione, D. Tringale, E. Guglielmino, G. Risitano

The quickly identify of fatigue limit of a mechanical component with good approximation is currently a significant practical problem not yet resolved in a satisfactory way. Generally, for a mechanical component, the fatigue strength…