Author: Satyanadham AtluriPublisher:
ISBN:
Category : Elasticity
Languages : en
Pages :
Book Description
Finite Element Analysis of Elastic-plastic Three Dimensional Cracks
Author: Satyanadham AtluriPublisher:
ISBN:
Category : Elasticity
Languages : en
Pages :
Book Description
Three-dimensional Elastic-plastic Finite-element Analysis of Fatigue Crack Propagation
Author: R. G. ChermahiniPublisher:
ISBN:
Category : Airframes
Languages : en
Pages :
Book Description
Three-dimensional Elastic-plastic Finite Element Analysis of Fatique Crack Growth and Closure
Author: R. G. ChermahiniPublisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 296
Book Description
Three-dimensional Elastic-plastic Finite Element Analysis of Fatigue Crack Growth and Closure
Author: Rahmatollah Ghadimi ChermahiniPublisher:
ISBN:
Category : Materials
Languages : en
Pages : 147
Book Description
ZIP3D: An Elastic and Elastic-plastic Finite-element Analysis Program for Cracked Bodies
Author: Zip3d
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723490224
Category :
Languages : en
Pages : 102
Book Description
ZIP3D is an elastic and an elastic-plastic finite element program to analyze cracks in three dimensional solids. The program may also be used to analyze uncracked bodies or multi-body problems involving contacting surfaces. For crack problems, the program has several unique features including the calculation of mixed-mode strain energy release rates using the three dimensional virtual crack closure technique, the calculation of the J integral using the equivalent domain integral method, the capability to extend the crack front under monotonic or cyclic loading, and the capability to close or open the crack surfaces during cyclic loading. The theories behind the various aspects of the program are explained briefly. Line-by-line data preparation is presented. Input data and results for an elastic analysis of a surface crack in a plate and for an elastic-plastic analysis of a single-edge-crack-tension specimen are also presented. Shivakumar, K. N. and Newman, J. C., Jr. Langley Research Center COMPUTER PROGRAMS; CRACKS; ELASTIC PROPERTIES; FINITE ELEMENT METHOD; PLASTIC PROPERTIES; SOLIDS; SURFACE CRACKS; COMPUTERIZED SIMULATION; CRACK CLOSURE; CYCLIC LOADS; J INTEGRAL; STRAIN ENERGY RELEASE RATE; STRESS INTENSITY FACTORS; THREE DIMENSIONAL MODELS...
Three-Dimensional Elastic-Plastic Finite-Element Analyses of Constraint Variations in Cracked Bodies
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722903527
Category :
Languages : en
Pages : 46
Book Description
Three-dimensional elastic-plastic (small-strain) finite-element analyses were used to study the stresses, deformations, and constraint variations around a straight-through crack in finite-thickness plates for an elastic-perfectly plastic material under monotonic and cyclic loading. Middle-crack tension specimens were analyzed for thicknesses ranging from 1.25 to 20 mm with various crack lengths. Three local constraint parameters, related to the normal, tangential, and hydrostatic stresses, showed similar variations along the crack front for a given thickness and applied stress level. Numerical analyses indicated that cyclic stress history and crack growth reduced the local constraint parameters in the interior of a plate, especially at high applied stress levels. A global constraint factor alpha(sub g) was defined to simulate three-dimensional effects in two-dimensional crack analyses. The global constraint factor was calculated as an average through-the-thickness value over the crack-front plastic region. Values of alpha(sub g) were found to be nearly independent of crack length and were related to the stress-intensity factor for a given thickness. Newman, J. C., Jr. and Bigelow, C. A. and Shivakumar, K. N. Langley Research Center RTOP 505-63-50-04...
Three-dimensional Elastic-plastic Finite-element Analyses of Constraint Variations in Cracked Bodies
Author: Three-Dimensional Elastic-Plastic Analysis of Shallow Cracks in Single-Edge-Crack-Tension Specimens
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722903398
Category :
Languages : en
Pages : 34
Book Description
Three dimensional, elastic-plastic, finite element results are presented for single-edge crack-tension specimens with several shallow crack-length-to-width ratios (0.05 less than or equal to a/W less than or equal to 0.5). Results showed the need to model the initial yield plateau in the stress-strain behavior to accurately model deformation of the A36 steel specimens. The crack-tip-opening-displacement was found to be linearly proportional to the crack-mouth-opening displacement. A new deformation dependent plastic-eta factor equation is presented for calculating the J-integral from test load-displacement records. This equation was shown to be accurate for all crack lengths considered. Shivakumar, Kunigal N. and Newman, James C., Jr. Langley Research Center RTOP 505-63-01-05...
Three-dimensional Finite Element Study of an Elastic-plastic Crack Tip
Author: Tumkur Sarveswaraiah DayanandaPublisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description