Postdoctoral Positions in Computational Mechanics and Multiphysics at the US Naval Research LaboratorySubmitted by siddiq_qidwai on Mon, 2013-10-28 17:47.
The Multifunctional Materials Branch of the Materials Science & Technology Division at the US Naval Research Laboratory in Washington DC has an interest in postdoctoral associate candidates for several areas in computational mechanics and multiphysics.
Topic of interest include: a) biomechanics of injury at high-rate of deformation at multiple scales, b) multiscale dynamics of flexible armor, c) crystal plasticity and dislocation dynamics in electrically assisted deformation of metals, and d) multiphysics modeling of corrosion.
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Stability of anisotropic magnetorheological elastomers in finite deformations: A micromechanical approach
Stephan Rudykh and Katia Bertoldi
Journal of the Mechanics and Physics of Solids 61 (2013) 949–967
In this paper, a correlation between simulation and a full crash test is presented. In order to achieve good agreement in the correlation, several Abaqus analysis techniques are evaluated.
Traction Prediction of a Smooth Rigid Wheel in Soil using Coupled Eulerian-Lagrangian Analysis - 2012Submitted by SIMULIA on Mon, 2012-09-24 14:50.
The approach to modeling soil is validated by comparing predicted traction of a trolling rigid wheel to measured traction test date available in the literature. Comparison of the measured and predicted traction force shows that this approach is reasonable for predictin traction in soil.
This paper presents an automated approach to extract strains of aircraft structural models from widely used CAD and FE environments. The developed approach has been implemented as an integrated tool in widely used CATIA V5 and Abaqus environment. The integrated tool is a quick inexpensive and effecive technique for predicting structural strains.
In this paper, the different "built in" material models based on the isotropic, kinematic and combined istropic-kinematic hardening theories available in Abaqus/Standard are evaluated for carbon steels. The results presented in this study are expected to provide important insight to practicing engineers dealing with inelastic material characteristics.
This study demonstrates a simulation of an integrated multilink suspension system model in
Abaqus. The model is assessed in Abaqus to determine the suspension strength and fatigue life of each individual link. This topological design optimization is executed for this multilink suspension model using ATOM to determine the critical load path, alternative concept designs, and locations for mass reduction in order to meet the performance requirements.
This paper describes the parameter-based geometrical optimization of a thrust collar bearing. The thrust bearing, for example, has to carry the whole axial force of the rotor with only minimal deformation of the collar surface over the turbocharger’s complete operating range.
This paper discusses a method to address this challenge by the creation of a moving
tie constraint via the MPC user routine. This approach allows the change in weight; change in inertia and effects of fluid momentum to be correctly and conveniently captured using dynamic modelling.
Using the Failure Assessment Diagram Method with Fatigue Crack Growth to Determine Leak-before- Rupture - 2012Submitted by SIMULIA on Mon, 2012-09-24 14:01.
The objective of this paper is to use Abaqus/Standard to compute elastic-plastic J-integral results along the crack front. These results are then used to calculate the plastic collapse crack reference stress, especially for cases when the reference stress solution is not available for a structural component.
The paper covers foundation performance issues and applications for pile-founded, gravity base, and deep water structures. Many of the significant applications were complemented by extensive experimental test programs to confirm or validate the analyses.
The principal objective was to ensure reliable design of the large size bearing test rig. The main challenge here concerned the simulation method for representing the complex mechanical construction of the machine with sufficient precision in an FE model.
This paper examines the performance characteristics of Abaqus 6.11 release for the latest GPU computing technology. The results are provided for finite element models with material, geometric and boundary nonlinearities relevant to current practice in the oil and gas industry, on workstation configurations, including a network of workstations.
This paper presents a detailed investigation of the interactions and interplay among these parameters as evidenced by the nonlinear response of the panel. The study focuses on the nonlinear response of the skin panel under combined thermal and structural loading.
In this paper, a failure criterion and damage properties are investigated to model delaminations in composite parts. Different modeling techniques are explored to evaluate their ability to replicate experimental results.
The ability of the design tool to predict part quality based on manufacturing process parameters is dependent upon the mechanical behavior of the fabric reinforcements, which includes the in-plane shearing and tensile behaviors, bending stiffness and friction between contacting surfaces during the manufacturing process.
This paper discusses the use of such advanced technique to solve the stent design problems. The paper would cover the essence of Finite Element Analysis, FE Model Parameterization and Optimization. Finite element modeling (FEM) and analysis with SIMULIA is used to estimate stress distribution in the stent.
Taking fluid flows generated around a circular cylinder immersed in a uniform flow as an object of study. As a consequence, the study has obtained comprehensive knowledge and findings that can be applied to problems associated with fundamental estimation of the flow around the circular cylinder.
This study presents Abaqus/Standard simulation of Lamb waves in smart composite plates is investigated for detecting delamination type damage and the effect of delamination size on the structural response.
In this paper, an analytical example of this innovative technique will be presented on one of Nabtesco Corporation (“Nabtesco” hereinafter)’s products. To determine the most advantageous crowning, it is very important to accurately evaluate surface stress for all phases of engagement.
In this aspect of study is investigating the recent introduction of the Extended Finite Element Method (XFEM) in Abaqus. This paper demonstrates and discusses how a real case of fatigue crack growth in a large diesel engine can be analyzed by the use of the XFEM in Abaqus.
A 3D Discrete Damage Modeling Methodology for Abaqus for Fatigue Damage Evaluation in Bolted Composite Joints - 2012Submitted by SIMULIA on Mon, 2012-09-24 12:22.
This study presents a discrete crack network model (DCN) for damage progression prediction has been developed by combining mesh independent matrix cracking with cohesive zone delamination models at the ply interfaces.