Three-dimensional Finite-element Analysis of Finite-thickness Fracture Specimens
Author : I. S. Raju
Publisher :
Page : 40 pages
File Size : 28,97 MB
Release : 1977
Category : Structural dynamics
ISBN :
Author : I. S. Raju
Publisher :
Page : 40 pages
File Size : 28,97 MB
Release : 1977
Category : Structural dynamics
ISBN :
Author : I. S. Raju
Publisher :
Page : 52 pages
File Size : 35,32 MB
Release : 1977
Category : Elastic plates and shells
ISBN :
Author :
Publisher :
Page : 38 pages
File Size : 12,11 MB
Release : 1984
Category :
ISBN :
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 34 pages
File Size : 17,22 MB
Release : 2018-08-16
Category :
ISBN : 9781725622586
Stress-intensity factors and load-line displacements were calculated for chevron-notched bar and rod fracture specimens using a three-dimensional finite-element analysis. Both specimens were subjected to simulated wedge loading (either uniform applied displacement or uniform applied load). The chevron-notch sides and crack front were assumed to be straight. Crack-length-to-specimen width ratios (a/w) ranged from 0.4 to 0.7. The width-to-thickness ratio (w/B) was 1.45 or 2. The bar specimens had a height-to-width ratio of 0.435 or 0.5. Finite-element models were composed of singularity elements around the crack front and 8-noded isoparametric elements elsewhere. The models had about 11,000 degrees of freedom. Stress-intensity factors were calculated by using a nodal-force method for distribution along the crack front and by using a compliance method for average values. The stress intensity factors and load-line displacements are presented and compared with experimental solutions from the literature. The stress intensity factors and load-line displacements were about 2.5 and 5 percent lower than the reported experimental values, respectively. Raju, I. S. and Newman, J. C., Jr. Langley Research Center NASA-TM-85798, NAS 1.15:85798 RTOP 505-33-23-02...
Author : I. S. Raju
Publisher :
Page : 52 pages
File Size : 19,64 MB
Release : 1977
Category : Elastic plates and shells
ISBN :
Author : RH. Dodds
Publisher :
Page : 24 pages
File Size : 35,86 MB
Release : 1985
Category : Correlations
ISBN :
Elastic-plastic finite element analyses of the three-point bend specimen geometry were performed as part of an investigation to study the application of the crack tip opening displacement (CTOD) fracture parameter to flawed pressure vessels. The elastic-plastic fracture mechanics (EPFM) parameters, CTOD and J, were determined from the results of two- and three-dimensional finite element analyses. Three sizes of the preferred specimen geometry (thickness, t, by depth, 2t, by span, 8t) and five steels with varying stress-strain characteristics were considered. To obtain experimental results for comparison, tests were conducted in accordance with the procedure outlined in British Standard BS 5762:1979, "Methods for Crack Opening Displacement Testing.".
Author : A. C. Pickard
Publisher :
Page : 204 pages
File Size : 24,17 MB
Release : 1986
Category : Fatigue
ISBN :
Author : Guido Dhondt
Publisher : John Wiley & Sons
Page : 362 pages
File Size : 26,67 MB
Release : 2004-11-19
Category : Science
ISBN : 0470857625
Though many 'finite element' books exist, this book provides a unique focus on developing the method for three-dimensional, industrial problems. This is significant as many methods which work well for small applications fail for large scale problems, which generally: are not so well posed introduce stringent computer time conditions require robust solution techniques. Starting from sound continuum mechanics principles, derivation in this book focuses only on proven methods. Coverage of all different aspects of linear and nonlinear thermal mechanical problems in solids are described, thereby avoiding distracting the reader with extraneous solutions paths. Emphasis is put on consistent representation and includes the examination of topics which are not frequently found in other texts, such as cyclic symmetry, rigid body motion and nonlinear multiple point constraints. Advanced material formulations include anisotropic hyperelasticity, large strain multiplicative viscoplasticity and single crystal viscoplasticity. Finally, the methods described in the book are implemented in the finite element software CalculiX, which is freely available (www.calculix.de; the GNU General Public License applies). Suited to industry practitioners and academic researchers alike, The Finite Element Method for Three-Dimensional Thermomechanical Applications expertly bridges the gap between continuum mechanics and the finite element method.
Author :
Publisher :
Page : 506 pages
File Size : 11,25 MB
Release : 1977
Category :
ISBN :
Author : Thomas A. Cruse
Publisher : ASTM International
Page : 936 pages
File Size : 40,29 MB
Release : 1988
Category : Fracture mechanics
ISBN : 0803109725