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2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.126 ∗ Corresponding author. Tel.: + 41-58-666-6377 ; fax: + 41-58-666-6359. E-mail address: ezio.cadoni@supsi.ch 2452-3216 c 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Aluminium alloys are attractive engineering materials for many applications, such as chemical, aerospace indus tries, aeronautical and automotive. Light armored vehicles are an example of this application. The requirement in the construction of defense vehicles of new lightweight armours for improving their survivability without sacrific ing e ffi ciency and performance, lead to a strong increase in the use of aluminium alloys. Composition, strain-rate, microstructure and temperature influence on the mechanical properties and failure mechanism of aluminium alloys were investigated for example by Higashi et al. (1991) and Peixinho and Doellinger (2010). Singh et al. (2012, 2013), studied the dynamic compressive and tensile behavior of the aluminium alloy, AA6063-T6 in the strain rate range from 0.001 s − 1 to 850 s − 1 . Tanimura et al. (2009) studied the dynamic behavior of several classes of aluminium al loys by means of sensing block type high speed material testing system. Oosterkamp et al. (2000) analyzed the strain rate sensitivity of two commercial aluminium alloys AA6082 and AA7108 in peak temper T6 and overaged T79 in ∗ Corresponding author. Tel.: + 41-58-666-6377 ; fax: + 41-58-666-6359. E-mail address: ezio.cadoni@s psi.ch 2452-3216 c 2016 The Authors. Published by Elsevier B.V. e r-review under responsibility of the Scientific Committee of ECF21. aterials f r a a licati s, s c as c e ical, aer s ace i s tries, aeronautical and automotive. Light armored vehicles are an example of this application. The requirement in the construction of defense vehicles of new lightweight armours for improving t eir s r i a ilit it t sacri c i e cie c a erf r ance, lea t a str i crease i t e se f al i ium alloys. siti , strai -rate, icr str ct re a te erat re i uence on the mechanical properties and failure mechanism of alumi i m alloys were investigated for example by Higashi et al. (1991) and Peixinho and Doellinger (2010). Singh et al. (2012, 2013), studied the dynamic compressive and tensile behavior of the aluminium alloy, AA6063-T6 i t e strai rate ra e fr . s − 1 t s − 1 . a i ra et al. (2009) studied the dynamic e a i r f se eral classes f al i i al l s ea s f se si l c t e i speed material testing system. Oosterkamp et al. (2000) analyzed the strain rate sensitivity of two commercial aluminium alloys AA6082 and AA7108 in peak temper T6 and overaged T79 in ∗ orresponding author. el.: + 41-58-666-6377 ; fax: 41-58-666-6359. - ail address: ezio.cadoni supsi.ch 2452-3216 c 2016 he uthors. Published by lsevier . . Peer-review under responsibility of the Scientific Committee of ECF21. XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine P. Brandão a , V. Infante b , A.M. Deus c * a Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal b IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal c CeFEMA, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation company, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy E ff ects of strain rate on mechanical properties in tension of a commercial aluminium alloy used in armour applications Ezio Cadoni a, ∗ , Matteo Dotta a , Daniele Forni a , Hanspeter Kaufmann b a University of Applied Sciences of Southern Switzerland, Campus SUPSI Trevano, Canobbio 6952, Switzerland b RUAG Defence AG, Thun 3602, Switzerland Abstract The use of aluminium alloys in the construction of defense vehicles is strongly increasing in these last decades because they require new lightweight armours for improving their survivability without sacrificing e ffi ciency and performance. In this paper the e ff ects of strain rate on the mechanical properties in tension of a commercial aluminium alloy AA7081 is analyzed. The tests have been carried out by means of three di ff erent set-ups for quasi-statics, medium and high strain rates. For the high and medium strain rate tests have been used respectively a Split Hopkinson Tension Bar device and a Hydro-pneumatic machine installed in the DynaMat Laboratory of the University of Applied Sciences of Southern Switzerland-Lugano. The results show: an increase of the stress at a given strain when increasing the strain-rate from 10 − 3 to 10 3 s − 1 , a strain-rate sensitivity of the uniform and fracture strain, a moderate reduction of the cross-sectional area at fracture with increasing the strain-rate. Based on these experimental results the parameters required by the Johnso -Cook constitutive law have been determin . c 2016 The Aut ors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: High strain-rate; Aluminium alloy; Split Hopkinson Tensile Bar; Hydro-Pneumatic Machine. 1. Introduction Aluminium alloys are attractive engineering materials for many applications, such as chemical, aerospace indus tries, aeronautical and automotive. Light armored vehicles are an example of this application. The requirement in the construction of defense vehicles of new lightweight armours for improving their survivability without sacrific ing e ffi ciency and pe forma ce, lead to a strong increase in the use of alumi ium alloys. Composition, strain-rate, microstructure and temperature influence on the mechanical properties and failure mechanism of aluminium alloys were investigated for example by Higashi et al. (1991) and Peixinho and Doellinger (2010). Singh et al. (2012, 2013), studied the dynamic compressive and tensile behavior of the aluminium alloy, AA6063-T6 in the strain rate range from 0.001 s − 1 to 850 s − 1 . Tanimura et al. (2009) studied the dynamic behavior of several classes of aluminium al loys by means of sensing block type high speed material testing system. Oosterkamp et al. (2000) analyzed the strain rate sensitivity of two commercial aluminium alloys AA6082 and AA7108 in peak temper T6 and overaged T79 in 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy E ff ects of strain rate on mechanical properties in tension of a commercial aluminium alloy used in armour applications Ezio Cadoni a, ∗ , Matteo Dotta a , Daniele Forni a , Hanspeter Kaufmann b a University of Applied Sciences of Southern Switzerland, Campus SUPSI Trevano, Canobbio 6952, Switzerland b RUAG Defence AG, Thun 3602, Switzerland Abstract The use of aluminium alloys in the construction of defense vehicles is strongly increasing in these last decades because they require new lightweight armours for improving their survivability without sacrificing e ffi ciency and performance. In this paper the e ff ects of strain rate on the mechanical properties in tension of a commercial aluminium alloy AA7081 is analyzed. The tests have been carried out by means of three di ff erent set-ups for quasi-statics, medium and high strain rates. For the high and medium strain rate tests have been used respectively a Split Hopkinson Tension Bar device and a Hydro-pneumatic machine installed in the DynaMat Laboratory of the University of Applied Sciences of Southern Switzerland-Lugano. The results show: an increase of the stress at a given strain when increasing the strain-rate from 10 − 3 to 10 3 s − 1 , a strain-rate sensitivity of the uniform and fracture strain, a moderate reduction of the cross-sectional area at fracture with increasing the strain-rate. Based on these experimental results the parameters required by the Johnson-Cook constitutive law have been determined. c 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committe of ECF21. Keywords: High strain-rate; Aluminium alloy; Split Hopkinson Tensile Bar; Hydro-Pneumatic Machine. 1. Introduction t r f r r t r , , - , t i , It l ff i ni a, ∗ , tt ott a , i l rni a , Hanspeter Kaufmann b a niversity of pplied Sciences of Southern S itzerl nd, a pus S SI Trevano, anobbio 6952, S itzerland b A efence , Thun 3602, S itzerland stract The use of alu iniu alloys in the construction of defense vehicles is strongly increasing in these last decades because they require ne light eight armours for i proving their survivability ithout sacri cing e ffi ciency and perfor ance. In this paper the e ff ects of strain rate on the echanical properties in tension of a co ercial alu iniu alloy 7081 is analyzed. he tests have been carried out by eans of three di erent set-ups for quasi-statics, ediu and high strain rates. or the high and ediu strain rate tests have been used respectively a plit opkinson ension ar device and a ydro-pneu atic achine installed in the yna at aboratory of the niversity of pplied ciences of outhern itzerland- ugano. he results sho : an increase of the stress at a given strain hen increasing the strain-rate fro 10 − 3 to 10 3 s − 1 , a strain-rate sensitivity of the unifor and fracture strain, a oderate reduction of the cross-sectional area at fracture ith increasing the strain-rate. ased on these experi ental results the para eters required by the Johnson- ook constitutive la have been deter in . c 2016 he uthors. ublish d by lsevier B.V. eer-revie under responsibility of the cienti c o ittee of 21. ey ords: igh strain-rate; lu iniu alloy; Split opkins n nsile ar; ydro-Pneu atic achine. 1. Introducti n Alu i i all s are attracti e e i eeri Copyright © 2016 The Aut ors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). P er-review under esponsibility of the Scientific Committee f ECF21. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt