EFFETTI DEL TAGLIO LASER SULLE PROPRIETÀ MECCANICHE DI LAMIERE IN ALLUMINIO

La continua ricerca e l’impiego di tecnologie sempre più avanzate nel campo aeronautico ha portato all’adozione di metodologie laser per il taglio di pannelli in alluminio per le strutture esterne di aerei in alternativa alla già consolidata tecnica della tranciatura tramite punzonatrice meccanica. In mancanza di specifici riferimenti di questa tecnologia nelle norme e in bibliografia è stata valutata l’effettiva interscambiabilità delle due tecniche in termini di mantenimento delle proprietà meccaniche. Si è pertanto effettuata l’analisi delle proprietà meccaniche statiche (trazione, bearing, microdurezza) di pannelli in lega di alluminio 6061 T6, comunemente impiegati nel settore aeronautico in special modo per i velivoli ultraleggeri. Da tali lastre sono stati ricavati, sia con il taglio laser che con la punzonatrice, i provini necessari ai test meccanici in modo da poter avere un confronto diretto tra le due tecniche. Si è inoltre valutato il comportamento a fatica assiale con R=-1 di provini in lamiera 6082 T6 tagliati al laser e ottenuti tramite tranciatura con punzonatrice. I risultati hanno evidenziato che il taglio laser può essere impiegato per la creazione di profilati metallici per l’impiego in aeromobili avendo però l’accortezza di programmare opportunamente il percorso del raggio laser durante il taglio evitando di iniziare dalle zone critiche della figura da realizzare

Application of the dynamic characterization of metals in automotive industry

This paper presents the experimental methodology used by R&D EMEA – Global Materials Labs Department to test metals at high strain rate of 500 s−1. The implementation of dynamic results in commercial FEM Software LS – DYNA for crash simulation are presented. The effects of the strain rate on the tensile properties of metals, used in automotive field, are evaluated using results obtained from a direct tension split Hopkinson bar, built in collaboration with the University of Applied Sciences of Southern Switzerland DynaMat Lab. Finally the complete mechanical characterization of the Magnesium alloy AZ31B is presented, from static up to dynamic tests, showing its applications in FCA (Fiat Chrysler Automobiles), problems and future developments

Psychosocial Outcomes of Quadrantectomy Versus Mastectomy in a Southern Italian Sample: Development and Needs of the Italian Derriford Appearance Scale 24

7siBreast cancer is associated with appearance concerns and issues of appearance identity, that require an appropriate and independent assessment. The Derriford Appearance Scale (DAS) has been widely used to this end, as has been shown in UK and other international samples. The aim of this study was to determine the extent to which an Italian translation of DAS24 is valid, reliable, and culturally appropriate, while remaining user friendly. The extent to which the statistical robustness of the scale is maintained was also assessed.nonemixedMoss, Timothy; Chirico, Andrea; Mallia, Luca; Lucidi, Fabio; Fucito, Alfredo; D'Aiuto, Massimiliano; Giordano, AntonioMoss, Timothy; Chirico, Andrea; Mallia, Luca; Lucidi, Fabio; Fucito, Alfredo; D'Aiuto, Massimiliano; Giordano, Antoni

Application of the dynamic characterization of metals in automotive industry

This paper presents the experimental methodology used by R&D EMEA – Global Materials Labs Department to test metals at high strain rate of 500 s−1. The implementation of dynamic results in commercial FEM Software LS – DYNA for crash simulation are presented. The effects of the strain rate on the tensile properties of metals, used in automotive field, are evaluated using results obtained from a direct tension split Hopkinson bar, built in collaboration with the University of Applied Sciences of Southern Switzerland DynaMat Lab. Finally the complete mechanical characterization of the Magnesium alloy AZ31B is presented, from static up to dynamic tests, showing its applications in FCA (Fiat Chrysler Automobiles), problems and future developments

Self-efficacy for coping with cancer enhances the effect of reiki treatments during the pre-surgery phase of breast cancer patients

Background/Aim: Self-efficacy for coping with cancer plays a critical role in influencing psychological cancerrelated outcomes, some studies suggested its role in enhancing or reducing the effects of psychological interventions in cancer patientS. Reiki has recently been included among the efficacious complementary therapeutic intervention for cancer patientS. Patients and Methods: The present study evaluated the role of self-efficacy for coping with cancer as buffer of the Reiki treatment effects on cancer-related symptoms in a randomized controlled trial (intervention versus control group) of breast cancer patients (N=110) during the pre-surgery phase. Results: Results showed that self-efficacy for coping with cancer can influence the effect of a Reiki treatment. Higher efficacious patients showed a more powerful effect of the Reiki intervention on both anxiety and mood than the low efficacious patientS. Conclusion: From a practical perspective, the study provides insightful results for healthcare professional