Nonlocal Regularization for Loss of Ellipticity in Inelastic Problems
Abstract not provided.
Publications
Porosity and Mechanical Characterization of Laser Welds
Abstract not provided.
Characterizing Populations Predicting Presence & Examing Mechanical Response Using 3D Reconstructions of Porosity in Laser Welds
Abstract not provided.
Reliability calculations for A304L SS laser welds with stochastic reduced-order model
Abstract not provided.
Reliability calculations for A304L SS laser welds with stochastic reduced-order models
Abstract not provided.
A Framework for Predicting the Performance of A304L SS Laser Welds with Stochastic Reduced Order Models
Abstract not provided.
Reliability calculations for ductile laser welds with stochastic reduced-order models
Abstract not provided.
Topology Manipulation for Fracture and Failure in Albany
Abstract not provided.
Progress in Adaptive Computational Mechanics Applications Using the Albany AgileComponents Framework
Abstract not provided.
PPM Task 3: FY 14 Work Emphasis
Abstract not provided.
Sandia's atoms-to-continuum approach to deformation and failure in tantalum
Abstract not provided.
Remeshing and mapping of internal state variables in large deformation processes
Abstract not provided.
A stabilized finite element formulation for monolithic thermo-hydro-mechanical simulations at finite strain
Abstract not provided.
Internal Variable Mapping to Support Geometry Adaptive Modeling of Ductile Fracture
Abstract not provided.
Reliability calculations for ductile laser welds with stochastic reduced-order models
Abstract not provided.
A path towards incorporating the physics and numerics of 304L laser weld failure
Abstract not provided.
The Effective Combination of Mesh Adaptation and Non-linear Thermo-mechanical Solution Components for the Modeling of Weld Failures
Abstract not provided.
Stochastic Reduced-Order Models for Multi-Scale Simulation of Laser Weld Failure
Abstract not provided.
Stochastic Reduced-Order Models for Multi-Scale Simulation of Laser Weld Failure
Abstract not provided.
The relationship between crack-tip strain and subcritical cracking thresholds for steels in high-pressure hydrogen gas
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Threshold stress intensity factors were measured in high-pressure hydrogen gas for a variety of low alloy ferritic steels using both constant crack opening displacement and rising crack opening displacement procedures. Thresholds for crack extension under rising displacement, K THi, for crack extension under constant displacement, KTHi*, and for crack arrest under constant displacement K THa, were identified. These values were not found to be equivalent, i.e. K THi < K THa < K THi*. The hydrogen assisted fracture mechanism was determined to be strain controlled for all of the alloys in this study, and the micromechanics of strain controlled fracture are used to explain the observed disparities between the different threshold measurements. K THa and K THi differ because the strain singularity of a stationary crack is stronger than that of a propagating crack; K THa must be larger than K THi to achieve equivalent crack tip strain at the same distance from the crack tip. Hydrogen interacts with deformation mechanisms, enhancing strain localization and consequently altering both the nucleation and growth stages of strain controlled fracture mechanisms. The timing of load application and hydrogen exposure, i.e., sequential for constant displacement tests and concurrent for rising displacement tests, leads to differences in the strain history relative to the environmental exposure history and promotes the disparity between K THi* and K THi. K THi is the only conservative measurement of fracture threshold among the methods presented here. © 2012 The Minerals, Metals & Materials Society and ASM International.
Modeling fluid flow in deformation bands with stabilized localization mixed finite elements
Abstract not provided.
Computational Mechanics Efforts in the Multiscale Description of Material Fracture and Failure
Abstract not provided.
Verification of J-integral capability in Sierra Mechanics
Abstract not provided.
Concurrent Multi-physics Capacities in Laboratory of Computational Mechanics
Abstract not provided.
An Investigation into Variational Nonlocal Regularization in Finite Deformational Elasticity
Abstract not provided.
Results 76–100 of 137