...-posterior shear fatigue test was devised to test one such dynamic stabilization system in anterior-posterior translation. Similar to ASTMF1717 assemblies, constructs were assembled so that screws were placed in ultra high molecular weight polyethylene blocks to attach to the test fixture. The test setup...

...Jonathan Parker Creep Fatigue knowledge is necessary for meaningful reliability assessment of existing power generating plant because cyclic operation of an aging power plant fleet requires better understanding of factors affecting damage initiation and propagation, as well as technologies...

..., fatigue Introduction IN718 is a commonly used nickel-base alloy for high temperature usage, e.g., in gas and steam turbines. At elevated temperatures IN718 is prone to the failure mechanism dynamic embrittlement. Dynamic embrittlement can be considered as a kind of stress corrosion cracking, driven...

..., measurements of residual stresses, and various wear and corrosion tests. This paper will represent microstructural and microhardness analyses of the thin surface layer after laser remelting of nodular cast iron 500-7. Particular attention is paid to fatigue crack initiation and propagation tests. Crack...

... cases highlight mechanical, environmental and installation issues. These include failure to account for material creep and fatigue, defects in fusion bonding, incompatibility of solvent cement, strength limitation of joint elements, and improper installation techniques. The case studies suggest ways...

... model. The parameters of this cohesive zone model were identified by an inverse method with the modeling of three-point bending tests of pre-cracked samples performed on the base and weld metals. The fatigue damage generated by the cyclic loading was computed by the fatigue continuum damage model...

...Thore B. Lund A number of competing failure mechanisms are involved in bearing failure initiation. For well manufactured bearings operating under clean and well controlled running conditions, sub-surface initiated fatigue is the classical initiation form. Three mechanisms dominate the concept...

...Jessica Delacroix; Jean-Yves Buffiere; Siegfried Fouvry; Armelle Danielou The influence of microstructure on the crack nucleation and growth under fatigue and fretting loadings was investigated on two different Al-Cu-Li alloys used for aerospace applications (2050-T8 and 2196-T8) and containing...

... planned for use on the moon for chemical analysis is discussed. It is shown that in-depth understanding of cyclic loading effects observed through accelerated creep rates due to creep-fatigue interaction in polymers is critical in terms of proper functioning of EAP based actuator devices. In the paper...

.... General preventive recommendations to reduce the incidence of ski injuries include avoiding fatigue. However, no study has yet examined to which extent ACL injuries in female recreational skiers are related to perceived fatigue. Therefore, 68 ACL injured female skiers and 136 matched controls were...

...B. Oberwinkler; M. Riedler; W. Eichlseder This paper presents the results of a long-term research program aimed at developing qualitative and quantitative design guidelines for the use of mechanical surface treatments designed to improve the fatigue life of structural components. High cycle fatigue...

... Sealants and Adhesives Denver, CO accelerated testing outdoor weathering artificial weathering sealants fatigue silicone urethane acrylic 14 09 2009 12 10 2009 24 11 2009 Jerome M. Klosowski1 and Patrick D. Gorman2 Journal of ASTM International, Vol. 7, No. 1 Paper ID...

.... Technol.   0361-8773 , Vol. 56 , No. 719 , 1984 , pp. 32 – 57 . Karpati , K. K. , “ Laboratory Fatigue Testing of a Two-part Polysulfide Sealant Correlated to Outdoor Performance ,” Durability Build. Mater.   0167-3890 , Vol. 5 , No. 1 , 1987 , pp. 35 – 51 . Karpati , K. K...

... hardly be avoided. Today the fatigue calculation of aluminium high pressure die cast parts is usually performed using two S/N curves—one account for the flawed basic material and one for the pore-free surface layer. This does not provide an accurate estimate for the computation of the lifetime or safety...

...M. Shirani; G. Härkegård The three dimensional distribution of defects within a fatigue specimen cut from a large spheroidal graphite cast iron component has been obtained by X-ray computed tomography. This distribution has been used as input for a fatigue assessment postprocessor...

... and plasticity provides a rationalization in explaining why nitinol fatigue life appears to be insensitive to the mean strain effect. References Manson , S. S. and Halford , G. R. , Fatigue and Durability of Structural Materials , ASM International , Materials Park, OH , 2006 , pp. 45 – 73...

...S. Wong; Z. C. Lin; A. Tahran; J. Boylan; K. Pike; P. Kramer-Brown The purpose of this study is to identify factors that affect superelastic Nitinol fatigue resistance using a commercially available wire specimen. The study reveals the fatigue resistance of Nitinol wire as functions of surface...

... to a series of shorter cycle, higher force/deformation tests. In addition, by “testing to fracture,” one can validate the fatigue analysis capability, learn the consequences of in vitro fractures, and provide information that can either be used for product improvement or for clinicians to make life-saving...

...H. Leitner; B. Oberwinkler; H.-P. Gaenser; M. Stoschka Although mechanical surface treatments are commonly used in engineering practice for their beneficial effect on fatigue life, little quantitative data are available from published literature. This paper presents the first results of a long-term...

...Patrick J. Golden; Dennis Buchanan; Sam Naboulsi The objective of this work was to evaluate life prediction methodologies involving fretting fatigue of turbine engine materials with advanced surface treatments. Fretting fatigue tests were performed on Ti-6Al-4V dovetail specimens with and without...