Issue 22

D. Gentile et alii, Frattura ed Integrità Strutturale, 22 (2012) 85-92 ; DOI: 10.3221/IGF-ESIS.22.09 91 A schema of a possible configuration has been reported in Fig. 8. As a sample break, cycles counting will stop. The related shaft will stop leaving the others shafts to run without changing load or speed. Gas spring and related connectors will avoid load cell drop and will allow his repositioning to a virtual zero. The machine is equipped with a spindle’s safety blocking system by a micrometer screw that prevents shaft bending up to defined limits. PC AND  CONTROLLER  ENGINE SAMPLE VIDEO CAMERA  ENCODER  THERMAL  CONTROL  Figure 8 : Functional Scheme. Complete system is mounted on a single steel chassis, which is possible to fix on the floor by screws and dumping interfaces. In order to run tests at different temperature a system using oil is in the process design at the moment (a procedure to obtain a patent has been started). The idea is that different temperature can be applied to specimens by oil in different heaters, one for each specimen. C ONCLUSION n this work the executive project has been presented in order to realize a rotating fatigue bending machine. The aim was to develop a machine at low costs and capable to test many specimens at the same time and eventually at different temperature. At the present the machine is being tested at the Lab. of Industrial Design of the University of Cassino in collaboration with CREA (Center of Reverse Engineering Applications) Lab. of the University of Naples Federico II for CAD/FEM simulations. Cost and construction time are less than similar commercial machine that are able to test only one specimen. The machine can be used changing many parameter’s test and is already predisposed to run test at high temperature. This part will be completed after the preliminary tests. The possibility to combine different loads and temperature with a single test controlling independently the load cells and the warming room with a single asynchronous engine is very interesting. R EFERENCES [1] Wöhler, Z. Baaw. 8 (1858-1870) 641. [2] H. F. Moore, G. N. Krouse University of Illinois, Engng. Exp. Sta. Circ., 23 (1934) 7. [3] F. Lehr Die Abkürzungsverfahren zur Ermittlung der Schwingungsfestigkeit von Materialien, Dr. - Ing. Diss. TH., Stuttgart (1925) [4] F. M. Prot, Rev. Métall., 34 (1937) 440. [5] A. Irfan, S. Raif, O. Güven, Materials and Design, 29 (2008) 397. [6] D. Brandolisio, G. Poelman, G. De Corte, J. Symynck, M. Juwet, F. De Bal, FATIMAT project, http://mechanics.kahosl.be/fatimat /, (2009) [7] N. Bonora, A. Ruggiero, D. Gentile, S. De Meo, Strain, 47 (2011) 241, doi: 10.1111/j.1475-1305.2009.00678.x 253 [8] N. Bonora, A. Ruggiero, L. Esposito, D. Gentile, Int. J. of Plasticity, 22(11) (2006) 2146. [9] N. Bonora, A. Ruggiero, Int. J. of Solids and Structures, 42(5-6) (2005) 1401. I