1,721,005 research outputs found
Experimental and numerical evaluation of the residual structural integrity of a helicopter tail rotor shaft subjected to ballistic impact
No full textThe aim of the paper is to describe a ballistic tolerant approach to evaluate the decrement of the structural integrity of a section of a helicopter tail rotor transmission shaft, made in A16061-T6 aluminum, impacted by a 7.62 ball bullet. The focus lies on the development of a reliable and efficient modelling methodology. Very refined numerical models are used to reduce the experimental efforts and to increase the awareness of the phenomena. Starting from previous work performed by the authors', a numerical model of the impacted shaft is presented and validated by comparison with the results of a large experimental programme. The model is used to assess the variation in the vibration modes and the buckling load caused by the damage. In order to improve the reliability of the model, the mechanical behaviour of the materials of the shaft and of the projectile has been fully considered: flow stress, strain rate, temperature, damage criteria
EXPERIMENTAL AND NUMERICAL ESTIMATION OF THE STRAIN RATE OF A HONEYCOMB SANDWICH PANEL WITH ALUMINUM SKINS AND NOMEX CORE
No full textSTRAIN RATE EFFECTS ON NOMEXTM HONEYCOMB CORE INVOLVED IN LOW VELOCITY IMPACTS ON SANDWICH PANELS
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Numerical simulation of a fracture toughness test of an Al6061-T6 aluminium alloy using a ductile criterion
No full textNumerical investigation of a three point bending test on sandwich panels with aluminum skins and NomexTM honeycomb core
No full textCompression after impact test (CAI) on NOMEXTM honeycomb sandwich panels with thin aluminum skins
Full text linkGeometry transferability of Lemaitre's continuum damage mechanics model in the plane stress specimens
No full textEffect of triaxiality and Lode angle on the plasticity behaviour of a Ti-6Al-4V Titanium alloy
No full textDanneggiamento da impatti a bassa velocità e resistenza residua a compressione di laminati CFRP con sensori FBG integrati
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