Author: P. S. LamPublisher:
ISBN:
Category :
Languages : en
Pages : 36
Book Description
Elastic-plastic Finite Element Analysis of Steady State Dynamic Crack Growth in Plane Strain Tension
Author: P. S. LamSmall-strain and Finite-strain Finite Element Analyses of Plane-strain Tensile Elastic-plastic Crack Growth
Author: Meng R. LiuElastic-plastic Finite Element Analysis of Fatigue Crack Growth in Mode 1 and Mode 2 Conditions
Author: Extended Finite Element Method for Crack Propagation
Author: Sylvie PommierPublisher: John Wiley & Sons
ISBN: 1118622693
Category : Technology & Engineering
Languages : en
Pages : 271
Book Description
Novel techniques for modeling 3D cracks and their evolution in solids are presented. Cracks are modeled in terms of signed distance functions (level sets). Stress, strain and displacement field are determined using the extended finite elements method (X-FEM). Non-linear constitutive behavior for the crack tip region are developed within this framework to account for non-linear effect in crack propagation. Applications for static or dynamics case are provided.
An Application of the Finite Element Method to Elastic-plastic Problems of Plane Stress
Author: M. SalmonPublisher:
ISBN:
Category : Computer programs
Languages : en
Pages : 60
Book Description
A computer program is presented for the small strain analysis of plane structures in the strain hardening elastic-plastic range. The finite element displacement method is used to perform the linear analyses in the iterative scheme. Bar and constant strain isotropic plane stress triangles are available for use in constructing structural idealizations. The use of ten different sets of material properties, three different material laws, and incremental proportional loading are available as options. Good correlation is shown with available test data and theoretical solutions.
Development of a Practical Methodology for Elastic-Plastic and Fully Plastic Fatigue Crack Growth
Author: R. Craig McClungPublisher:
ISBN:
Category : Materials
Languages : en
Pages : 490
Book Description
Finite Element Modeling of Plasticity Induced Crack Closure and a Mechanics Based Study of Crack Closure Measurement Techniques
Author: Marcos LugoPublisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages :
Book Description
From its discovery, crack closure was recognized as a key aspect in understanding the fatigue crack growth process. Considering the condition of plane stress, a vast amount of research has been conducted experimentally, analytically, and numerically to understand the complex process of fatigue crack growth and crack closure. Nonzero crack opening stress values are routinely observed, and it seems that there is a general agreement regarding the incidence of the phenomenon under plane stress. However, investigations regarding crack closure under plane strain conditions are less abundant. Moreover, the existence of crack closure under the plane strain state of the stress has been questioned. The importance of accurate measurements of closure to predict adequately fatigue crack growth rates should not be underestimated. Models employed to predict fatigue crack growth rates rely on plasticity-induced crack closure concepts, and the validity of plasticity-induced crack closure depends on crack closure measurements. Crack closure measurements can be performed with Elber's Method, the ASTM standard (Compliance offset method), or it may be done alternatively by the compliance ratio (CR) or the adjusted compliance ratio method (ACR). In this research, a small scale yielding two-parameter modified boundary layer analysis is performed to study the occurrence of plasticity-induced fatigue crack closure under constant amplitude loading and plane strain conditions. A wide range of T-stresses and KI levels are considered in the finite element analysis with the purpose of exploring the behavior of the crack opening stress. Crack closure was observed for some values of T-stress. Other values of T-stress resulted in an absence of closure under steady state conditions. In addition, an elastic-plastic finite element model was used to simulate a growing fatigue crack with WARP3D software. The computed displacements were used to determine the effective stress intensity factor range [delta]Keff with the ASTM standard compliance offset approach, the (CR) method, and the (ACR) method. Finally, measurement location effects on ACR and the ability of ACR method to remove residuals stresses were investigated.
ZIP2DL: An Elastic-Plastic, Large-Rotation Finite-Element Stress Analysis and Crack-Growth Simulation Program
Author: Elastic-plastic Strain and the Effect of Non-singular Stress at the Crack Tip in Finite Thickness Plate Using Various Experimental and Analytical Methods
Author: Subrato DharFundamentals of Deformation and Fracture
Author: International Union of Theoretical and Applied MechanicsPublisher: Cambridge University Press
ISBN: 9780521267359
Category : Science
Languages : en
Pages : 670
Book Description
An international survey of work in the field of deformation and fracture, first published in 1985.