Showing papers in "International Journal of Fatigue in 1984"

TL;DR: In this paper, the cyclic response of ASTM A-516 Gr 70 carbon low alloy steel subjected to fully-reversed constant strain- or stress-controlled cycles has been determined.

TL;DR: In this paper, a survey of serious aircraft accidents involving fatigue fracture has been carried out, which includes not only fatal accidents but also those in which the damage to the airframe was substantial or greater.

TL;DR: In this paper, a method for evaluating the cumulative damage resulting from the application of cyclic stress (or strain) sequences of varying amplitude is presented, and both the crack initiation and propagation stages of the fatigue failure process are included.

TL;DR: In this article, the influence of the ply stacking sequence on the impact resistance and subsequent O-tension fatigue performance of carbon fiber laminates has been investigated, and it was found that the non-woven composites showed a marked sensitivity to impact loading, but increases in residual static strength were noted after cycling.

TL;DR: In this paper, the cyclic and monotonic plastic zone sizes were measured in a medium strength ferrite-pearlite steel (BM 45) tested in fatigue at 25 Hz at room temperature.

TL;DR: In this paper, a single relation was derived from the Manson-Coffin formula to describe the low cycle fatigue behavior of 316 L stainless steels by taking into account plastic strain range and nitrogen content.

TL;DR: In this article, the linear part of the fatigue crack growth diagram is divided into Stages IIa and IIb by the point O whose coordinates K∗ and A are dependent on the physical and structural characteristics of the material.

TL;DR: In this article, a ring-shaped aluminium alloy was machined orthogonally on a lathe equipped with a quick-stop device at cutting speeds of 0.5-1.5 m s−1 with tools having positive rake angles in the range 10-30°.

TL;DR: In this article, low cycle fatigue tests were conducted on cast nickel-base superalloy IN738LC in vacuum and air and on specimens coated with a layer of NaCl and Na 2 SO 4 at 900°C and two different strain rates.

TL;DR: In this paper, an Al-Cu alloy under specially designed complex load sequences was used to investigate the propagation of fatigue crack propagation in a rain-flow cycle counting model, which was applied to the analysis of fatigue fracture growth under complex load sequence.

TL;DR: In this paper, the fatigue crack growth rate and crack closure responses of BS4360 50B steel are determined for a service load history experienced by a gas storage vessel, based on a linear summation using the Paris law; no significant improvement is achieved by incorporating crack closure into the analysis.

TL;DR: In this paper, a model of fatigue crack growth based on an analysis of elastic/plastic stress and strain at the crack tip is presented, which allows the authors to calculate the growth rate over the near threshold and linear ranges of the general da/dN versus ΔK curve to be calculated.

TL;DR: In this paper, two powder-metallurgy (PM) forms, hot-isostatically-pressed and extruded-and-forged, and a conventionally cast-andwrought form were all given the same heat treatment.

TL;DR: In this paper, the effect of crack angle on the cyclic life of the component and on the cycle life ratio is discussed and the analysis is applied to 7075-T6 aluminium alloy to predict the dependence of crack growth rate on the crack angle.

TL;DR: In this article, a mathematical equation is derived to predict fatigue crack growth rates on the basis of a J integral analysis from the fatigue fracture behaviour of low cycle fatigue samples, and the results obtained from this study show that predicted fatigue crack propagation rates for Ti-24V, Ti-6Al-4V and Al-6Zn-2Mg alloys are very close to experimental values.

TL;DR: In this paper, the relationship between the fatigue limit and microstructure of low-carbon 12CrNi3A steel has been investigated, and it was shown that the fractographic characteristics in the near-threshold region of fatigue macrocrack growth were similar to those in the fatigue microcrack initiation region.

TL;DR: In this article, fatigue tests have been performed on compact type and 4-point bend specimens of a low-alloy steel BS4360-50D in air at 30 Hz and at various stress ratios to determine the influence of microstructure on the fatigue crack propagation.

TL;DR: In this article, the effect of grain size on the near threshold stress intensity factor in a low-carbon steel has been studied and it is proposed that this temporary retardation in crack growth is due to the resistance offered by the grain boundary to the plastic zone when it tries to cross the first grain and move on to the adjacent grains.

TL;DR: In this article, the results of low frequency corrosion fatigue crack growth tests on HY 130 and Q1N steels are reported and compared and the similarities and differences in the response of the two steels to variations in environment and stress ratio are highlighted and discussed in terms of some recent theories of corrosion fatigue cracks growth and the impurity element embrittlement of grain boundaries.

TL;DR: In this article, the Bauschinger effect was introduced into the fatigue life calculation by considering the monotonic stress/strain curves in tension and compression for different degrees of coldforming and by introducing a damage parameter.

TL;DR: In this article, the fatigue crack growth characteristics of high-strength aluminium alloys are discussed in terms of behaviour during mechanical testing and fracture surface appearance for a wide range of crack growth rates, the crack extends both by the formation of ductile striations and by the coalescence of micro-voids.

TL;DR: In this paper, the effect of mean stress together with decreasing stress range on fatigue crack propagation behavior in mild steel was investigated and the delay period between crack arrest and reprogation was found to be a function of the maximum stress intensity factor stepdown ration, K 2max / K 1max.

TL;DR: In this article, an internal notch was machined into the wall of the pipe before cyclic internal water pressurization to reduce the fatigue life of uPVC pressure pipe.

TL;DR: In this article, the fatigue properties of spot-welded lap joints under a constant mean load made from 1.2 and 3 mm sheet thickness stainless steel with one, two or three spot welds in series are reported.

TL;DR: In this paper, the conditions determining the fatigue fracture mechanism in quenched and tempered steel are discussed with reference to fatigue crack propagation mechanism (FCPM) maps, and the change from one fatigue mechanism to another is presented.

TL;DR: In this article, the gel electrode measurement is performed with a 5 V, 350 ms pulse, and the charge flow during subsequent measurements is then repeatable to within ±15% although this pulse duration is an order of magnitude shorter than that employed in the previous study, excellent sensitivity is retained.