... cyclic loads helicopters loading spectra notches stress raisers testing N. E. Dowling I and A. K. Khosrovaneh 1 Simplified Analysis of Helicopter Fatigue Loading Spectra REFERENCE: Dowling, N. E. and Khosrovaneh, A. K., "Simplified Analysis of Helicopter Fatigue Loading Spectra," Development...

... A three-dimensional, elastic-plastic, finite-element analysis of crack growth and closure under cyclic loading was developed and used to study the behavior of a crack in a finite-thickness middle-crack tension specimen. The finite-element model was composed of eight-noded isoparametric...

... propagation crack closure plastic deformation plastic zone cyclic loads stress analysis retardation fatigue life predictions crack opening model crack growth model Arij U. de Koning^ and Gert Liefting^ Analysis of Crack Opening Behavior by Application of a Discretized Strip Yield Model REFERENCE...

... Four approaches have been examined to predict the endurance of circumferentially notched, uniaxially loaded test pieces subjected to fully reversed strain-controlled cyclic loading at elevated temperatures. Results are compared with uniaxial data derived from smooth test pieces. The strain-time...

... specimens can be explained by considering the magnitude of the strength of the slipband in each case. biaxial stresses cyclic loads crack growth rate fatigue (materials) plastic deformation dislocation structures fractography E. R. de los Rios,' M. W. Brown,' K. J. Miller,' and H. X. Pei...

... In order to extend our understanding to more generalized and practical cyclic loading conditions, severe nonproportional loading has been studied. Tension-torsion, low-cycle fatigue tests were performed on 1Cr-Mo-V steel at room temperature by applying intermittent axial half cycles. Tests...

... that low-frequency, small-amplitude cyclic loads superimposed on a constant load can reduce the threshold stress substantially. Since such loading can occur on real structures, it was felt that the threshold stress should be determined under those more severe and realistic conditions. Furthermore, by using...

... of the environment and cyclic loads. No relationship was found between microstructure and corrosion-pit sites. corrosion corrosion fatigue crack initiation cyclic loads cyclic frequency crack propagation M. E. Taylor^ and J. M. Barsom^ Effect of Cyclic Frequency on the Corrosion-Fatigue Crack...

... acceleration effects is considered unique. fatigue (materials) acceleration crack propagation cyclic loads damage tolerance residual stress retardation /. T. Wozumi, ^ T. Spamer,' and G. E. Lambert^ An Engineering Model for Assessing Load Sequencing Effects REFERENCE: Wozumi, J. T., Spamer, T...

... was predicted by three static and two dynamic techniques. After testing, the predicted and measured capacities were compared. The wave equation and the Dutch cone penetration soundings resulted in the most consistent predictions. bearing capacity cyclic loads failure forecasting piles pile driving...

... zone formulae are derived for the peak overload/underload case which are shown to be of central importance for describing the nonlinear effects due to any irregular loading history. It is demonstrated, in principle, how crack closure can be taken into account. fracture mechanics cyclic loads...

... straining, with or without cyclic loading, over that observed for constant loads. stress corrosion cracking strain rate creep properties nonpropagating cracks threshold stress corrosion fatigue cyclic loads R. N. Parkins ~ Development of Strain-Rate Testing and Its Implications REFERENCE...

... of the undisturbed specimens over that of the remolded specimens might have been caused by a slight overconsolidation which existed in the alluvial deposit of the sands containing the fines. liquefaction sands fines cyclic loads triaxial tests overconsolidation specimens soils Kenji Ishihara,' Masato...

.... stresses strains aluminum alloys crack propagation fatigue (materials) cyclic loads aircraft tensile properties mathematical prediction stress analysis residual stress plastic deformation titanium alloys D. L. Rich' and L. F. Impellizzeri' Fatigue Analysis of Cold-Worked and Interference Fit...

... for modulus, yield stress, and strength. composite materials tension compressing cyclic loads sandwich laminates yield strength strength residual stress C. T. Herakovich/ J. G. Davis, Jr and C. N. Viswanathan^ Tensile and Compressive Beliavior of Borsic/Aluminunn REFERENCE: Herakovich, C. T...

... involved a layer of metal with a thickness of about four average grains. fatigue (materials) copper surface properties cyclic loads strain hardening strain measurement crack propagation plasticity tests crack initiation Yoshifumi Nakano^ andB. I. Sandor'^ Cyclic Plasticity of Copper...

... Fatigue crack growth rate data are obtained for center cracked specimens of A533B steel subjected to elastic-plastic cyclic loading. Cyclic J-integral values estimated from load versus deflection hysteresis loops are correlated with these growth rate data. The relationship obtained...

... to stress-corrosion cracking. fractures (materials) mechanical properties crack propagation fatigue (materials) stress corrosion cyclic loads titanium alloys R. E. Lewis,^ J. G. Bjeletich,^ T. M. Morton,^ and F. A. Crossley ^ Effect of Cooling Rate on Fracture Behavior of Mill-Annealed Ti-6AI...

... correlation with J-integral values estimated from load versus deflection hysteresis loops. Also, agreement is obtained with the extrapolation of linear elastic fatigue crack growth rate data. fatigue (materials) cracking (fracturing) crack propagation plastic deformation cyclic loads N. E...

...-dimensional, nonlinear, finite-element analysis using an incremental theory of plasticity to predict crack-closure and crack-opening stresses during the crack-growth process under cyclic loading. A two-dimensional finite-element computer program, which accounts for both elastic-plastic material behavior...