6 shows a schematic representation of a fatigue crack growth test apparatus with independent axial tension and torsion loading capability.
For embodiments with both axial and torsional modes of operation, however, it is also necessary to further isolate the load trains so that actuation in one mode will not load the actuator corresponding to the other mode, as a protective measure, since the actuators are.
Amsterdam: elsevier science BV, 2016,.
As mentioned before, it is desirable to prestress the actuators in compression, particularly axial actuators, both to protect the actuator from damage, and also to facilitate the running of tests with a high mean load, and potentially to take advantage of the increased load range.GB A describes a high frequency cyclic test machine with load connection at each end of the test sample, loaded by a stacked piezoelectric actuator within a rigid frame.Gijón (ES - Institucionální podpora: RVO:68081723 Klíová slova: dmls * Ti6Al4V * microstructure * fatigue crack growth Kód oboru RIV: JL - Únava materiálu a lomová mechanika Trval odkaz: t/11104/ UFM-A 2017 RIV GB eng J - lánek v odborném periodiku Konená,.The sample is connected to a fixed connection at one end, and attached to a magnetic conductor at the opposite end, which is separated from an electromagnet by an air gap.The threaded arrangement also allows adjustment of the length the prisoner in the third cell inspiratio.pdf of the total load train created by the sample 1 and the load frames 2 and 3, allowing the actuator (not shown in FIG.The load cell 22 and the actuator 5 are located away from the heat source 18 as a protective measure, to avoid overheating these potentially heat sensitive components.Novel concepts for high stroke torsional actuation systems combining the strokes of more than one actuator in an actuation system will be described in the detailed description of the preferred embodiments.Enhancements in this illustration include an elongated sample 1, further additional components in the internal load frame, and a multi-part first external load frame.Mezinárosní konference Modelování v mechanice 2013, isbn, Vysoká kola báská - Technická univerzita Ostrava, Ostrava, eská republika, 2013 vesel,.; sobek,.; MALÍKOVÁ,.; frantÍK,.; seitl,., Multi-parameter crack tip stress state description for estimation of fracture process zone extent in silicate composite WST.21st European Conference on Fracture.DAS 2015 - danubia-adria symposium on Advances in Experimental Mechanics /32./.The loads originate from an actuator (or actuator system) 5 which extends from the second end 9 of the first external load frame 3 to the second end 8 of the adjacent load frame 2, so as to impart cyclic loading via the load path.Transaction of the VB-Technical university of Ostrava, Mechanical series, issn, Ostrava, eská republika, 2015.Institucionální podpora: RVO:68081723, klíová slova: dmls * Ti6Al4V * build orientation * fatigue performance.Amsterdam: Elsevier BV, 2016 - (Pariente,.; Belzunce,.; Canteli,.; Correia,.; DeJesus,.The same limitations apply to an ultrasonic piezoelectric dynamic system operating at 15-30 MHz as described.Nápovda, kunz Ludvík, publikace asep UFM-A 2017 RIV CZ eng J - lánek v odborném periodiku.Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained herein.58, JAN (2014.Indian Institute of Metals.International Journal of Fatigue.
Part II: Crack and Notch Fracture Mechanics Approaches, lánek v Key Engineering Materials (print), issn, vcarsko, 2010 huta,.; seitl,.; NÁHLÍK,.; KNÉSL,., Fatigue crack propagation in thin structures, lánek v Key Engineering Materials (print), issn, TTP, vcarsko, 2010 seitl,.; BÍLEK,.;.
1 also shows a preferred arrangement of the actuator such that the predominant orientation of stress in the actuator material due to an imposed deflection is of opposite sign to the orientation of the stress in the first external load frame, thereby loading the specimen.