... finite-element analysis strength prediction design allowables Adam J.. Sawicki 1 Development of Compression Design Allowables for Composite Bolted Joints Using ASTM Standard D 6742 Reference: Sawicki,A. J., "Developmentof CompressionDesignAllowablesfor CompositeBolted Joints UsingASTM StandardD 6742...

... the energy release rates. This procedure was not time efficient, and hence, less appealing. Finally, a third procedure was developed to calculate mixed-mode energy release rates as a function of delamination lengths. This procedure required only one nonlinear finite-element analysis of the specimen...

... the ultimate strength behavior for each failure mechanism. composites stress concentrations compression progressive damage finite-element analysis notches open hole strength failure mechanisms Hui Bau, 1 D. M. Hoyt, 1 and Carl Q. Rousseau 2 Open Hole Compression Strength and Failure...

... strength prediction methodology, which uses 2-D finite-element analysis and ply-level quadratic failure theory, was used to interpret test results. Reasonable agreement between experimental data and predicted trends was demonstrated for IM6/3501-6 tape laminates. Incorporation of bolt elasticity effects...

...% in terms of load, whereas K at the critical fracture location correlated the data within -+20%. KEYWORDS: surface cracks, fracture, stress-intensityfactor, finite-element analysis, constraint, elasticity, plasticity, steel Nomenclature An Projected area of yielded element, n, on x-z plane, mm 2 Ar Total...

... analyses to investigate fracture behavior and the influence of factors such as flaw sizes, weld strengths, inelastic crack growth, and other parameters affecting fracture toughness demands. KEYWORDS: fracture toughness, finite-element analysis, welded connections, steel, frames, ductility, seismic design...

... A new aerospace bolt thread lap inspection criterion is proposed based on fatigue crack propagation trajectories predicted by finite-element analysis (FEA) and fracture mechanics techniques. Fastener producers and end users incur high costs due to thread lap problems. Current thread lap...

... evaluated over a range of uniaxial and biaxial loading conditions. in-plane biaxial testing advanced aeropropulsion materials cruciform specimen design reusable fixturing finite-element analysis optimization techniques attachment methods prototype fixturing J. R. Ellis, l G. S. Sandlass, 2...

... method composite materials finite-element analysis buckling stress concentrations compressive failure compression testing Seng C. Tan Land M. Knight2 An Extrapolation Method for the Evaluation of Compression Strength of Laminated Composites REFERENCE: Tan, S. C. and Knight, M., "An Extrapolation...

... estimates of J 0 and of applicability limits on evolving fracture analysis methods (that is, T-MBL, J-Q , and J/J 0 ). Specifically, when ∣β∣ >0.4 these analyses show that the T-MBL approximation of J 0 is accurate to within 25% of a detailed finite-element analysis. As “structural-type...

..., qualitative approximation of experimental behavior. Mode II fracture elastic-plastic fracture finite-element analysis damage zone model stable crack growth Jennifer Cordes I and Rahmi Yazici 1 Elastic-Plastic Mode II Fracture in an Aluminum Beam REFERENCE: Cordes, J. and Yazici, R., "Elastic...

... state variables. Evolution of these internal state variables is governed by the damage-dependent ply-level stresses. The updated damage state and the ply-level stresses are then employed in the local-global evaluation of component failure. This model is incorporated into a finite-element analysis code...

... compared with actual measurements of wear on a pump. Possible reasons for this lack of agreement are proposed, and an alternative approach is presented to determine the absolute wear coefficients. This approach involves the finite element analysis of two-phase flow within the pump casing coupled with wear...

... using the British Pendulum Tester, a friction mechanism for a grooved road surface is proposed. finite-element analysis skid resistance British Pendulum Tester grooved texture concrete road Nammalwar Purushothaman, 1 Brian S. Heaton, 2 and Ian D. Moore 2 A Numerical Analysis of the Friction...

... the interior deformation fields and to study several parameters of interests such as J , crack-tip singularity and J , crack-mouth opening displacement equivalence for a chosen specimen geometry. surface flaw plasticity optical methods finite-element analysis work hardening J-integral singularity...

... release rates finite-element analysis mixed-mode fracture criterion W. Binienda,1 A. S. D. Wang, 2 y. Zhong, 2 and E. S. Reddy 2 A Criterion for Mixed-Mode Matrix Cracking in Graphite-Epoxy Composites REFERENCE: Binienda, W., Wang, A. S. D., Zhong, Y.. and Reddy. E. S., "A Criterion for Mixed-Mode...

...-axis specimens are compared. To determine the load-carrying capacity of the specimens, a criterion which is a function of both stresses and strains is used. composite materials finite-element analysis progressive failure failure analysis off-axis specimens S. M. Cron,~ A. N. Palazotto...

... of the stress and strain distributions is needed. Charpy fracture size effects constraint cleavage critical tensile stress ductile-to-brittle transition temperature upper-shelf energy slip-line field theory finite-element analysis David J. Alexander and Ronald L. Klueh SPECIMEN SIZE EFFECTS...

... mode I and mode II (ELS test) conditions has been determined by means of a finite-element analysis. Also, the micromechanics of mode II fracture have been studied during in situ and postmortem observations of the fracture process. Both the ENF and ELS tests give similar values for G IIc . However...

... are calculated using a finite-element analysis which incorporates both linear and nonlinear stress-strain behavior of the pavement component materials. The fractional increase of total strains is basically in terms of three parameters which characterize the permanent deformation relations from the laboratory...