...Yoshiyuki Furuya; Hideaki Nishikawa; Hisashi Hirukawa; Nobuo Nagashima; Etsuo Takeuchi ABSTRACT Fatigue data sheets of the National Institute for Materials Science disclose the results of gigacycle fatigue tests conducted on wrought aluminum alloys. The materials tested were hot-rolled plates...

...Shin-ichi Komazaki; Kosuke Egami; Masayuki Kamaya; Chiaki Hisaka; Akito Nitta A new fatigue testing technique, the small bulge fatigue (SBF) test, was recently developed by some of the present authors. In this technique, a cyclic oil pressure is alternatively applied to both surfaces of a small...

...Cody Gibson; Robert Stephens; Santosh B. Narasimhachary; David E. Mills; Andrew Rosenberger This paper describes pilot test results from a round-robin conducted in support of the standard ASTM E2760 , Standard Test Method for Creep-Fatigue Crack Growth Testing , on creep-fatigue crack growth...

... properties including creep, low cycle fatigue (LCF), creep-fatigue interaction (CFI), high cycle fatigue (HCF), fracture toughness, and crack growth has been generated covering important candidate materials such as alloy 617M tubes and forgings, 304HCu stainless steel tubes, and alloy 625 castings. Tubes...

...Sanjay Manda; Sumeet Mishra; N. P. Gurao The effect of prestrain induced by load and displacement control low cycle fatigue (LCF) on subsequent tensile behavior of commercially pure copper was investigated. Mechanical properties obtained after post-fatigue tension (half-life fatigue followed...

...Christoph Bleicher In large castings made of nodular cast iron, dross is not easy to detect with nondestructive testing (NDT) methods and reduces the static and cyclic fatigue strength of the material significantly, as shown in the example in figure 1. This causes a significant amount of work...

...Robert Pilarczyk; Ricardo Actis; Joseph Cardinal; Scott Carlson; James Harter; Joshua Hodges; Scott Prost-Domasky; Guillaume Renaud The application of engineered residual stresses (ERSs) on aircraft structure provides an opportunity to significantly extend the total fatigue life of critical...

...Xin Li; Jianwei Yang In this paper, a methodology is developed to investigate the combined effect of some main factors (bolt pretension load, shear load, coefficient of friction, and bolted joints structure) on the fatigue performance of bolted joints. A parameter k , which reflects the ratio...

... direction) and the X-Y direction (perpendicular to the build direction). The high cycle fatigue and corrosion fatigue properties of these metals were measured using R. R. Moore rotating cantilever fatigue tests, both in air and with a salt water drip on the test sections. Testing was conducted in order...

...Jonas Hensel; Thomas Nitschke-Pagel; Klaus Dilger Fatigue design concepts for welded structures generally consider residual stresses as a factor affecting the mean stress influence. Residual stresses are mostly interpreted as mean stresses. In addition, high tensile residual stresses...

... fatigue life improvements have been recognized by the aerospace industry, in-service components may have surface flaws with sizes below current inspection limits. A concern is that the application of LSP over an existing crack may cause unintended detrimental consequences. To address this concern, two...

...Scott Carlson; Robert T. Pilarczyk Fastener holes represent the most common fatigue details found in airframe structures. In order to minimize the impact fastener holes have on the fatigue behavior of critical aircraft components, many are processed by cold expansion (Cx). Cx imposes a residual...

...Harish M. Rao; Jidong Kang Magnesium alloy has attracted considerable attention from the automotive industry because of its low density and high specific strength combined with excellent casting capabilities. However, the role of casting defects and surface finish on the fatigue life emerges...

... crack growth fatigue optimization crack-growth modeling FASTRAN crack closure stress intensity factor spectrum loading References Newman , J. C. , Jr. , FASTRAN—A Fatigue Crack Growth Life Prediction Code Based on the Crack-Closure Concept, Version 5.4 User Guide , Fatigue...

...A. Roiko; J. Solin; T. Sarikka; H. Hänninen In fatigue, the early growth mechanisms, paths, and rates of the microstructurally small cracks are not well known. Growth of subsurface—undetected—cracks cannot be monitored in real time, and postfracture fractography is complicated because...

...D. Scott MacKenzie During full-scale fatigue testing, an F/A-18 E/F arresting hook point shank failed after 1,361 simulated arrestments. This part is designed to last 4,500 arrestments without cracking. Therefore, an investigation was undertaken to determine the cause of premature catastrophic...

...D. G. Harlow; H. Cao; P. Schmidt Characterization and prognosis of materials subjected to very high cycle fatigue is an important aspect of life cycle design and management for structural components. This procedure is even more critical for components in devices that are implanted into humans...

...M. Thielen; M. Marx; M. Sheikh-Amiri; C. Boller; C. Motz Fatigue-crack propagation is, by far, the most crucial failure mechanism of technical systems. The key to understanding microscopic processes that lead to failure lies in the knowledge of local stresses, the driving force of cracks. We...

...S. Gowda; C. Hotz; K. Manigandan; T. S. Srivatsan; A. Patnaik; J. Payer In this paper, the results of a study aimed at understanding the extrinsic influence of test specimen orientation, with respect to a wrought alloy-steel plate, on the stress-controlled cyclic fatigue properties and fracture...

...M. S. Hussain; A. R. Anilchandra; N. Jagannathan; C. M. Manjunatha In this study, a novel concept of 3D constant life diagram (CLD) for fatigue life prediction of a unidirectional (UD) polymer composite under spectrum load is proposed. Further, it is constructed and used to predict the fatigue life...