Fatigue behaviour

Acoustic Emission to Model the Fatigue Behaviour of Quasi-Isotropic Carbon-Epoxy Laminate Composites. 

The general fatigue behaviour which is observed in glass fibre reinforced plastics is illustrated in Fig. 3.32. In most grp materials, debonding occurs... 

Fig. 3.32 Typical fatigue behaviour of glass reinforced polyester...

There is no general rule as to whether or not glass reinforcement enhances the fatigue behaviour of the base material. In some cases the matrix exhibits longer fatigue endurances than the reinforced material whereas in other cases the converse is true. In most cases the fatigue endurance of grp is reduced by the presence of moisture. 

Fig. 8.69 Effect of air and aerated or deaerated distilled water and 3Vo NaCl solution on fatigue behaviour of steel at 25°C (after Duquette and Uhlig)...

Fig. 8.72 Effect of applied potential on corrosion fatigue behaviour of a ferritic stainless steel in 3% NaCl (after Amzallag el al )...

Stoloff, N. S. and Duquette, D. J., Microstructural effects in the fatigue behaviour of metals and alloys , CRC Critical Reviews in Solid Slate Sciences, 4, 615-87 (1974)... 

Amzallag, C., Rabbe, P. and Desestret, A., Corrosion fatigue behaviour of some special stainless steels, ASTM STP 642, pp. 117-32 (1977)... 

Mshana, J. S., Vosikovsky, O. and Sahoo, M., Corrosion fatigue behaviour of nickel-aluminium bronze alloys , Canadian Metallurgical Quarterly, 23, 7-15 (1984)... 

In many ways the fretting fatigue situation is analogous to the notched fatigue behaviour, not because the fretting damage resembles a mechanical notch, although this view has been held by some workers, but because the... 

Mechanical properties per se concerns with the qualities which determine the behaviour of a material towards applied forces. The ability to support weight without rupture or permanent deformation, to withstand impact without breaking, to be mechanically formed into different shapes - all these depend upon a combination of mechanical properties characteristic of metals. Four types of behaviour of a material under stress are very important linear or elastic behaviour, plastic behaviour, creep behaviour and fatigue behaviour. 

The lifetime of advanced composite components for use in aircraft is governed primarily by allowable deformation or by fatigue. The fatigue behaviour has been the subject of many years testing by the aircraft companies, generating empirical load-cycle curves for many combinations of fibre, matrix and orientation. Humidity ingress (diffusion... 

Good mechanical properties dynamic fatigue behaviour tribological properties low coefficient of friction good heat and cold behaviours resistance to numerous chemicals such as typical hydrocarbons, oils, greases, solvents and oil products. 

Good ratio of cost to mechanical properties elasticity fair creep resistance and fatigue behaviour low moisture uptake heat and cold behaviours tribological properties (coefficient and wear) oil and solvent resistance high impact strength of suitable grades. 

Good mechanical and electrical properties fair creep resistance fatigue behaviour fair shrinkage fair moisture uptake heat and cold behaviours with a broad range of continuous use temperatures -100°C to +150/180°C optical and UHF transparency food contact and sterilization for suitable grades. 

Good mechanical, chemical and electrical properties rigidity good creep resistance fatigue behaviour fair moisture uptake fair shrinkage heat behaviour with continuous use temperature up to 250°C high-energy radiation behaviour. 

Good thermo-mechanical, chemical and electrical properties rigidity gamma irradiation resistance UHF transparency good creep resistance and fatigue behaviour low moisture uptake low shrinkage heat behaviour fire resistance low coefficient of thermal expansion. 

Superior fatigue behaviour, as measured by the fatigue crack growth rate. 

The fatigue behaviour of pure hydroxy- and fluorhydroxyapatite-sintered bioceramics has been studied in ambient air, distilled water and simulated human saliva [86]. The authors observed that, as a general trend, HA ceramics exhibited a lower resistance to fatigue than fluoridated ones. Another work [87] showed that the hardness remained essentially unchanged until 80% of OH were replaced with F , whereas it noticeably increased with greater fluoride contents. The elastic... 

Examples of accounts of applying the fracture mechanics approach to the fatigue behaviour of rubbers are given in references 15-19. In a review of testing methodology for reinforced rubber composites20 it is concluded that... 

Hoffmann MJ, Schneider GA, Petzow G (1993) The potential of Si3N4 for thermal shock applications. In Schneider GA, Petzow G (eds) Thermal Shock and Thermal Fatigue Behaviour of Advanced Ceramics. NATO ASI Ser E 241, Kluwer Academic Publishers, Dordrecht p 49... 

Lin CKJ, Jenkins MG, Ferber MK (1993) Evaluation of Tensile Static, Dynamic and Cyclic Fatigue Behaviour for a HIPed Silicon Nitride at Elevated Temperatures. In Chen IW, Becher PF, Mitomo M, Petzow G, Yen TS (eds) Silicon Nitride Ceramics -Scientific and Technological Advances. Symp Proc 287, Mat Res Soc, Pittsburgh, p 455... 

Compared with other structural materials there is a relative dearth of fatigue data for ceramics, and it is therefore not surprising that little is known of the fatigue behaviour of glass-ceramic matrix composites. It appears... 

Table 3.14 Fatigue behaviour of SiC fibre-reinforced LAS74...

M.J. Couper et al Casting defects and the fatigue behaviour of an aluminium casting alloy. Fatigue Fract. Eng. Mat. Struct. 13, 213-227 (1990)... 

To investigate the control factors of welded component s fatigue behaviour, and use the analytical methods for estimating the total fatigue life of welds subjected to variable-amplitude loading histories and surface treatments, in order to find some possible methods to improve the fatigue strength. 

M. Borowczak and A. G. Causa, "Fatigue Behaviour of Cord-Reinforced Rubber Composites," Conference Proceedings ACS, Rubber Division, Louisville, Ky., May 1989. 

The establishment of the interrelationships between polymer fracture properties and contact fatigue behaviour requires some knowledge of the contact stress field. The specificity of fretting loading is that, depending on the applied contact load and imposed relative displacement, two different contact conditions can be achieved within the interface [54,55] (Fig. 5) ... 

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