.... residual stresses cold-working fatigue fracture mechanics weight function stress intensity factors William T. Fujimoto1 Journal of ASTM International, Vol. 3, No. 5 Paper ID JAI12559 Available online at www.astm.org Modeling the Formation and Growth of Cracks from ColdWorked Holes ABSTRACT: First...

... of steels and different geometries that have been welded, cold bent, repair welded, or overloaded, was used as a ‘Master curve’ of the residual stresses. In all cases compared, it has been shown that the transverse measured residual stresses were tensile at the surface The stress intensity factor (SIF...

... The application of fracture mechanics to mechanical fasteners requires stress-intensity-factor solutions for cracks at fastener holes and in threaded, round bars. This bibliography lists references that present stress-intensity-factor solutions for cracks at circular holes and a wide range...

... a surface crack at the snap radius is developed. The stress intensity factor distributions along the surface crack front with various crack shapes and sizes in the disk under a typical engine operation condition are calculated. Then, the effect of biaxial stresses on the stress intensity factor of a crack...

.... Numerical results of the stress intensity factors and energy release rate along the crack front are obtained terms of the interfacial matrix M . It is found that the fields near the crack front are often in mixed mode, due to material anisotropy and the three dimensional nature of the crack front...

... was evaluated using the relationship between low cycle fatigue (LCF) parameters and the fracture parameter, Δ T , as estimated. These are in good agreement with the experimental results. lug joints interference fit fatigue crack growth stress intensity factors fractography elasto-plastic analysis...

... the opportunity of confidently making use of analytical methods that obey the important principles of mechanics. The estimation of effective stress intensity factors for bridged matrix cracks that occur in titanium composites subject to fatigue loading at modest load levels is an important element...

... Nondimensional stress intensity factors have been numerically determined for a straight-fronted edge crack located at the thread root of a fastener. An influence-function or weight-function approach was used in determining K I for several fastener sizes: diameters ranging from 1 to 6 in. (2.5...

... of finite width using direct tabular inter polation of the finite-element results and to demonstrate the accuracy of a weight-function approach for computing stress intensity factors for a cracked plate subject to arbitrary stresses across the thickness. The reference solutions used in the weight-function...

... traction distribution, interior stress fields, and crack tip stress intensity factors for any cracks present. Explicit equations for these quantities are developed which enable the physical parameters responsible for crack initiation, development, and early propagation to be readily obtained. Refinements...

... force fracture mechanics stress intensity factors aluminum alloys standardization test methods D. B. Rayaprolu ~and R. Cook ~ A Critical Review of Fretting Fatigue Investigations at the Royal Aerospace Establishment REFERENCE: Rayaprolu, D. B. and Cook, R., "A Critical Review of Fretting Fatigue...

...-dimensional approximations to planestrain fracture mechanics problems, for which exact or highly accurate numerical solutions exist. In all cases, the use of a piecewise-flat traction BIE implementation is shown to give excellent results. analytical methods stress intensity factors three dimensions...

.... impact test fracture toughness impact fracture toughness dynamic keycurves transition times stress intensity factors caustics high-speed photography W. BOhme I Dynamic Key-Curves for Brittle Fracture Impact Tests and Establishment of a Transition Time REFERENCE: Brhme, W., "Dynamic Key-Curves...

... in still others. fracture mechanics fracture testing stress intensity factors numerical stress analysis compliance Francis L Baratta, 1Joseph A. Kapp, 2 and David S. Saunders 3 Load-Point Compliancefor the Arc-Bend/ArcSupport Fracture Toughness Specimen REFERENCE: Baratta, F. I., Kapp, J...

... approach used in conjunction with a through-thickness stress distribution to calculate suitable stress-intensity factors for threaded connections. threaded connections stress analysis fatigue a-c field measurement stress intensity factors weight function Andrew Newport ~and Grzegorz Glinka z...

... Recent developments in elastic crack analysis are discussed based on extensions and applications of weight function theory in the three-dimensional regime. It is shown that the weight function, which gives the stress intensity factor distribution along the crack front for arbitrary distributions...

... components within the symmetric mesh zone. Once the decoupled explicit weight functions are predetermined explicitly for a given crack geometry, the decoupled stress-intensity factors, K I(II) , under any loading conditions can be evaluated efficiently and accurately by a sum of worklike products between...

... of the dynamic, mixed-mode, crack-tip stress field expressed in series form. Values of K II associated with the propagating crack were found to be essentially zero when compared with the dominant opening mode stress intensity factor, K I . curving cracks dynamic stress fields photoelastic studies...

... An efficient finite-element methodology for evaluating the stress-intensity factors ( K I , K II ) and the weight functions ( h I , h II ) of a self-similar propagating mixed-mode crack has been established with a single colinear virtual crack extension. This is accomplished through...

... at the free surface but suggest a thick transitional zone through the thickness. A linear elastic fracture mechanics quantity called the corresponding stress-intensity factor is found to be a conservative way of interpreting test data near crack tips in elastic nearly incompressible materials. stress...