Load And Environment Interactions In Fatigue Crack Growth Under Spectrum Loading PDF Download
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Author | : R. P. Wei |
Publisher | : |
Total Pages | : 25 |
Release | : 1978 |
Genre | : |
ISBN | : |
Download Load and Environment Interactions in Fatigue Crack Growth Under Spectrum Loading Book in PDF, ePub and Kindle
The importance of delay (or, retardation in the rate of fatigue crack growth) produced by load interactions in variable-amplitude loading on the accurate prediction of fatigue lives of aircraft and other engineering structures has been recognized for some time and has begun to receive greater attention in recent years. Recent investigations showed that the effects of delay can be quite large, and that these effects need to be taken into account in developing improved fatigue analysis procedures for aircraft and other engineering structures. A number of models (based on the concepts of crack closure, residual stress intensity factor, etc.) have been proposed to account for the effects of delay. These models, while successfully predicting trends in the rate of fatigue crack growth for randomized load spectra, appear to break down for ordered spectra. Several basic problems contributed to the lack of complete success, and needs to be resolved in the development of improved models for predicting load interaction effects (chiefly delay) on fatigue crack growth.
Author | : D. F. Bryan |
Publisher | : ASTM International |
Total Pages | : 256 |
Release | : 1980 |
Genre | : Fracture mechanics |
ISBN | : |
Download Effect of Load Spectrum Variables on Fatigue Crack Initiation and Propagation Book in PDF, ePub and Kindle
Author | : |
Publisher | : ASTM International |
Total Pages | : 362 |
Release | : 1976 |
Genre | : Alloys |
ISBN | : |
Download Fatigue Crack Growth under Spectrum Loads Book in PDF, ePub and Kindle
Author | : T. T. Shih |
Publisher | : |
Total Pages | : 26 |
Release | : 1974 |
Genre | : |
ISBN | : |
Download Load and Environment Interactions in Fatigue Crack Growth Book in PDF, ePub and Kindle
The influences of environment on delay and on fatigue crack growth under programmed loading were examined for a mill annealed Ti-6Al-4V alloy. Test environments included dehumidified argon, air (with 30-60% relative humidity), distilled water, and 3.5% NaCl solution. The effects of load sequence and block size on fatigue under programmed loads were investigated also. Experimental results show that the mildly aggressive environments (atmospheric moisture and distilled water) have little effect on delay. Salt solution, on the other hand, has a significant effect on delay and on crack growth under programmed loading; the effect on delay being dependent on frequency or hold-time. Both load sequence and block size can significantly alter fatigue life under programmed loading. The need for further fundamental understanding of load and environment interactions in fatigue is discussed. (Modified author abstract).
Author | : Robert P. Wei |
Publisher | : ASTM International |
Total Pages | : 352 |
Release | : 1976 |
Genre | : Electronic book |
ISBN | : 9780803103443 |
Download Fatigue Crack Growth Under Spectrum Loads Book in PDF, ePub and Kindle
Author | : Ralph Ivan Stephens |
Publisher | : ASTM International |
Total Pages | : 345 |
Release | : 1976 |
Genre | : Alloys |
ISBN | : |
Download Fatigue Crack Growth Under Spectrum Loads Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 38 |
Release | : 1973 |
Genre | : |
ISBN | : |
Download Load Interaction Effects on Fatigue Crack Growth in Ti-6Al-4V Alloy Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 26 |
Release | : 1985 |
Genre | : |
ISBN | : |
Download Influence of Load Interactions on Crack Growth as Related to State of Stress and Crack Closure Book in PDF, ePub and Kindle
Author | : MS. Rosenfeld |
Publisher | : |
Total Pages | : 19 |
Release | : 1982 |
Genre | : Crack growth |
ISBN | : |
Download Load-Environment Interaction Effects on Crack Growth in Landing Gear Steels Book in PDF, ePub and Kindle
Recent research into the crack growth behavior of aircraft landing gear steels shows that combinations of aggressive chemical environment and high sustained loading can cause significant reduction in the fatigue crack growth life of 300M steel. Crack growth behaviors of 300M and HP 9-4-0.30 steels are compared for continuous salt water immersion and alternate immersion in synthetic sea water environments. An analysis approach which sums the crack growth due to cyclic loading in an inert environment is shown to accurately correlate and predict the combined effects of chemical environment and mechanical loading on crack growth. Crack growth behavior under landing gear stress spectra typical of Air Force and Navy usage is compared.
Author | : L. F. Impellizzeri |
Publisher | : ASTM International |
Total Pages | : 242 |
Release | : 1977 |
Genre | : Technology & Engineering |
ISBN | : |
Download Cyclic Stress-Strain and Plastic Deformation Aspects of Fatigue Crack Growth Book in PDF, ePub and Kindle