... calculated. This is applied with reasonable success to the standard helicopter loading spectra Helix and Felix, and a much simplified version of Helix is proposed that consists of repetitions of a single typical flight. fatigue (materials) stress strain cracking (fracturing) plastic deformation...

... behavior between long and physically short cracks, although other factors, such as the nature of the singularity and the extent of local plasticity, are deemed potentially to be important. fatigue (materials) cracking (fracturing) crack propagation crack closure short cracks fatigue thresholds...

... (materials) cracking (fracturing) crack propagation torsion Mode I (tensile opening) Mode III (anti-plane shear) crack closure and sliding interference fatigue thresholds variable-amplitude loading Robert O. Ritchie^ A Comparison of Fatigue Oracle Propagation in Modes I and III REFERENCE: Ritchie...

... further research and development. welded joints residual stresses cracking (fracturing) test specimens standards fracture toughness K Ic crack-tip opening displacement Oliver L. Towers^ and Michael G. Dawes^ Welding Institute Research on the Fatigue Precracking of Fracture Toughness...

... and was approximately 50% less than the weight loss of the immersed plate specimens. brick masonry corrosion creep properties sustained load wall panels deformation cracking (fracturing) acid rain Stephen A. Dial,^ Ramon L. Carrasquillo,^ and John E. Breen^ Corrosion Induced Deformation Behavior...

... arguments. The application of such models to the prediction of Mode III fatigue crack propagation behavior under both constant amplitude and simple variable amplitude loading spectra is briefly reviewed. fatigue (materials) cracking (fracturing) crack propagation Mode III torsional loading alloy...

... stress and strain components on the maximum shear plane for a given hold time. stainless steels elevated temperature fatigue life biaxial stresses damage hardening (materials) cracking (fracturing) Fathy A. Kandil,^ Keith J. Miller,^ and Michael W. Brown^ Creep and Ageing Interactions...

.... stress corrosion hydrogen embrittlement cracking (fracturing) aluminum alloys microstructure test method susceptibility Anthony W. Thompson ^ and I. M. Bernstein ^ Loading Mode (Mode I/Mode III) Testing for Stress Corrosion Cracking REFERENCE: Thompson, A. W. and Bernstein, I. M., "Loading Mode...

... parameters and the energetics of discrete cracking events. acoustics emission fracture (materials) fracture tests toughness cracking (fracturing) steels steel castings James L. Stokes^ and George A. Hayes^ Investigation of Acoustic Emission During Fracture Toughness Testing of Chevron-Notched...

... cracking (fracturing) crack propagation life expectancy requirements faults tolerance failure (mechanics) loads (forces) failure probability mechanics structural properties structures J. R. Gebman' and P. C. Paris^ A Practical Probabilistic Method for Evaluating the Fail-Safeness...

... arrestment. KEY WORDS: cracking (fracturing), fracture (materials), advanced fiber composites, ballistic damage, impact strength, military aircraft, antiaircraft projectiles, highexplosive projectiles, tensile strength, fracture strength, ballistics, residual strength Advanced fiber composites, chiefly...

... fracture cracking (fracturing) cemented carbides ceramics magnesite refractory crack propagation composite materials E. A. Almond^ and B. Roebuck^ Precracking of Fracture Toughness Specimens by Wedge Indentation REFERENCE: Almond, E. A. and Roebuck, B., "Precracking of Fracture Toughness Specimens...

... ) for A36 steel. The percent coefficient of variation was 6.4 percent for HSLA steels and 8.4 percent for A36 steel. fracture (materials) failure cracking (fracturing) elastic theory plastic theory tensile properties stress-strain diagrams bend tests analyzing steels structural steels crack...

... in the fatigue specimens can be observed from the damage growth study. composite materials nondestructive tests cracking (fracturing) crack propagation damage growth fatigue tests stress redistribution radiography acoustic emission opaque additive failure F. H. Chang,' D. E. Gordon,' and A. H...

... with compliance data when a/w > 0.75 but always tended to underestimate J c . An equation derived from an improved analysis by Merkle and Corten tended to overestimate J c . crack propagation fractures (materials) cracking (fracturing) crack initiation fracture tests toughness mechanical...

... theoretical and experimental values of the initiation time is between one and two for a given nominal stress. KEY WORDS: crack propagation, cracking (fracturing), fractures (materials), notched specimens Conventional fatigue tests (for example, plotting of Wohler curves) give gross information on the fatigue...

...-toughness specimens and center-notched panels varied from 0.10 in. (0.25 cm) to that of a fatigue precrack. Results are also presented for blunt-notch toughness tests of aluminum alloy 6061-T651 using compact-toughness specimens. crack propagation fractures (materials) cracking (fracturing...

... and corner-crack growth as well as the weight function method are addressed. crack propagation fatigue (materials) cracking (fracturing) design stress analysis T. A. Cruse,' G. J. Meyers,' andR. B. Wilson' Fatigue Growth of Surface Cracks REFERENCE: Cruse, T. A., Meyers, G. J., and Wilson, R. B...

... of this investigation provided encouraging evidence of the feasibility of on-line monitoring of Zr-2.5Cb pressure tubing. zirconium zirconium alloys acoustic properties cracking (fracturing) fatigue (materials) fracture properties hydrides stress intensity factor notch edge opening displacement E. B...

... plasticity effects are included. fractures (materials) plastic deformation cyclic loads J-integral cracking (fracturing) fatigue (materials) crack propagation N. E. Dowling Geometry Effects and the J-lntegral Approach to Elastic-Plastic Fatigue Crack Growth REFERENCE: Dowling, N, E., "Geometry...