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Showing papers in "Engineering Failure Analysis in 2009"


Journal ArticleDOI
TL;DR: In this article, a review of Ni-base superalloys in terms of fundamental deformation mechanisms, environmental effects, and interactions between environment and deformation mode is presented, where the basic principles that are developed are used to show how both intrinsic and extrinsic variables can be manipulated to control fatigue behaviour and as a guide for formulation of engineering life prediction models.

339 citations


Journal ArticleDOI
TL;DR: In this paper, a series of three-dimensional semi-elliptical pitted models were used to investigate the effect of pit aspect ratio on stress concentration factor (SCF) under uniaxial tension loading.

222 citations


Journal ArticleDOI
TL;DR: In this article, a welding simulation procedure is developed using the FE software ANSYS in order to predict residual stresses and their relaxation during crack propagation by isoparametric stress mapping between meshes without and with cracks.

150 citations


Journal ArticleDOI
TL;DR: The Essential Work of Fracture (EWF) method as mentioned in this paper has been used for this type of fracture characterization, determining two parameters: the specific work of fracture, related with the real fracture process area, and the specific non-essential work, wp that corresponds with the work done in the outer region of the crack tip.

116 citations


Journal ArticleDOI
TL;DR: In this paper, a methodology based on fuzzy logic is proposed for the establishment of a risk-based inspection (RBI) program for carbon steel pipe integrity management, which includes personal experiences along with deterministic models in the calculation.

112 citations


Journal ArticleDOI
TL;DR: In this article, the use of nonlinear methodology for structural failure analysis was used for failure prediction rather than forensic analysis, and the failure prediction was confirmed by the expensive full-scale testing of a transmission tower design that collapsed during the test.

111 citations


Journal ArticleDOI
TL;DR: In this paper, the inspection of damages detected in some blades of 300kW wind turbines revealed that the nature of these damages was probably due to a fatigue mechanism, and the causes that had originated the failure (superficial cracks, geometric concentrator, abrupt change of thickness) have been studied, verifying, by means of the simplified evaluation procedure of fatigue life of the Germanischer Lloyd (GL) standard, that these causes can explain the failure detected in the period of time in which it happened.

108 citations


Journal ArticleDOI
TL;DR: In this paper, two-and three-dimensional finite element welding simulations have been carried out to simulate a T-type fillet weld which is frequently used in the heavy vehicle.

104 citations


Journal ArticleDOI
TL;DR: In this paper, the results of experimental vibration tests of the helicopter turbo-engine compressor blades were presented for selected undamaged blades, without existence of preliminary cracks or corrosion pits.

100 citations


Journal ArticleDOI
Jan Belis1, J. Depauw, Dieter Callewaert1, Didier Delincé1, R. Van Impe1 
TL;DR: In this article, the failure behavior of laminates composed with a stiffer and stronger interlayer material, called SentryGlas ® Plus (SGP), was investigated experimentally.

96 citations


Journal ArticleDOI
TL;DR: In this paper, a fretting fatigue rig was designed and a limited range of fatigue tests was carried out at the middle high cycle fatigue regime in order to access an exploratory S-N curve for a Grosbeak conductor, which was mounted on a mono-articulated aluminium clamping system.

Journal ArticleDOI
TL;DR: In this article, a high capacity drop weight impact testing machine was constructed at the University of Wollongong, in order to evaluate the ultimate capacity of railway prestressed concrete sleepers under impact loads.

Journal ArticleDOI
TL;DR: In this paper, the effect of torque tightening a nut and bolt on the fracture strength and the stress intensity geometry factor of a fastener hole containing a symmetrical pair of edge cracks was investigated.

Journal ArticleDOI
TL;DR: In this paper, the influence of metallurgy using a range of existing rock bolt steels and (2) commercial steels varied considerably. But the results showed that steel microstructures (pearlitic-ferritic and tempered martensite) had similar resistance to SCC and HE in the most aggressive conditions (pH 2.1 and −1500mVSCE).

Journal ArticleDOI
TL;DR: In this paper, the effect of weld geometry on the fatigue life of non-load-carrying fillet welded cruciform joints was experimentally investigated and a correlation between the weld geometry and the fatigue lifetime was analyzed in detail.

Journal ArticleDOI
TL;DR: In this article, the authors analyzed a catastrophic crankshaft failure of a four-stroke 18-V diesel engine of a power plant for electrical generation when running at a nominal speed of 1500-rpm.

Journal ArticleDOI
TL;DR: In this paper, the effect of bolt interference fit on the fatigue life of lap joints in double shear was investigated by conducting experimental fatigue tests and also analytically by FE simulation.

Journal ArticleDOI
TL;DR: In this paper, a premature failure that occurs prior to the expected load cycles during the vertical fatigue tests of a rear axle housing prototype is studied, which mainly originated from the same region on test samples.

Journal ArticleDOI
TL;DR: In this paper, the fatigue life of a rubber mount was predicted by combining test of material properties and finite element analysis (FEA), where the critical region cracks prone to arise were obtained and analyzed.

Journal ArticleDOI
TL;DR: In this article, a considerable number of brake discs of fire fighting vehicles used in supporting to the aeronautical activities were found cracked during NDT and further cracks examination by using optical microscope and field emission scanning electron microscope (FESEM) revealed the cracks were propagated in semi elliptical shape through the thickness of the friction surfaces.

Journal ArticleDOI
TL;DR: In this article, a numerical model for dynamic vehicle-track interaction at rail welds with longitudinal surface irregularity is presented, and the model is applied to calculate the dynamic wheel-rail contact forces and the sizes and locations of the contact areas.

Journal ArticleDOI
TL;DR: In this article, the authors deal with the fracture analysis of thermally exposed 9Cr-1Mo ferritic steel after tensile and impact testing at room temperature and show that the fracture behavior of the 9Cr−1Mo steel is strongly affected by the presence of precipitates of secondary phases.

Journal ArticleDOI
TL;DR: In this article, a method for arresting further crack growth from cracks by drilling holes in the vicinity of the crack tips was investigated, and it was found that compressive residual stress was more effective to retard the crack growth than reducing the stress concentration around initial crack tips.

Journal ArticleDOI
TL;DR: In this article, different stress intensity factor (SIF) solutions numerically obtained by previous researchers on transversely cracked cylinders subjected to tension loading are analyzed, in order to provide the engineer with solutions applicable to different real situations in fracture mechanics or damage tolerance analyses such as static or cyclic (fatigue) loading, environmentally assisted cracking or corrosion-fatigue.

Journal ArticleDOI
TL;DR: In this paper, a case study of a catastrophic failure of a web marine crankshaft and a failure analysis under bending and torsion applied to crankshhafts is presented.

Journal ArticleDOI
TL;DR: In this paper, the effects of hard (silica) and soft (rubber) nano-particles on un-notched samples under constant cyclic stress amplitude fatigue were studied.

Journal ArticleDOI
TL;DR: In this paper, a failure analysis of final superheater tube in ultra-supercritical (USC) coal power plant is presented, where micro-structural changes such as grain growth and carbide coarsening are examined by scanning electron microscope.

Journal ArticleDOI
TL;DR: In this paper, a multi-physics theoretical model of a solenoid valve used in an automobile transmission is constructed using the finite element method, which includes the coupled effects of electromagnetic, thermodynamics and solid mechanics.

Journal ArticleDOI
TL;DR: In this article, the failure analysis results of the bucket wheel excavator (BWE) portal tie-rod support were presented, showing that the failure was the consequence of superposition of the negative effects caused by inadequate shaping and dimensioning of the support assembly for given load conditions, as well as influences of mentioned defects of the metal weld structure.

Journal ArticleDOI
TL;DR: In this article, a computational methodology is proposed for fatigue damage assessment of metallic automotive components and its application is presented with numerical simulations of wheel radial fatigue tests, based on the local strain approach in conjunction with linear elastic FE stress analyses.