Finite Element Analysis

EVALUATION OF THE StressWave COLD WORKING PROCESS ON HIGH-STRENGTH ALUMINUM ALLOYS FOR AEROSPACE

Eric T. Easterbrook and Michael A. Landy

This report evaluates a new fatigue enhancement method, Stress Wave Cold Working (SWCW), using extensive, post-yield Finite Element Analysis with LS-DYNA to understand and optimize the process. The FEA simulations, validated against experimental data, were used to model the residual compressive stresses and guide the design of tooling, ultimately confirming the new method's superior performance over conventional cold working.

Nonlithophysal Rock Fall on Waste Packages

Zekai Ceylan

This study uses the nonlinear transient dynamic Finite Element code LS-DYNA to simulate the impact of falling nonlithophysal rocks on a Naval nuclear waste package. The detailed 3D Finite Element models, which include contact and plastic material behavior, demonstrate that even worst-case corner drop impacts do not cause plastic strains to exceed the failure limit of the waste package's outer barrier.

High Cycle Fatigue Crack Modeling and Analysis for Deck Truss Flooring Connection Details

Anthony H. DePiero, Robert K. Paasch

This paper develops a high-fidelity methodology using global/local Finite Element Analysis in ABAQUS to investigate high cycle fatigue cracking in a naval ship's deck truss connection. A detailed solid submodel provides precise stresses for a ZENCRACK fracture mechanics analysis, which successfully predicts fatigue lives consistent with in-service observations.

Numerical simulation of ballistic impact on composite laminates

M.A.G.Silva , C.Cismasiu, C.G.Chiorean

This paper details the implementation of a 3D spectral-element method to simulate the complex process of multistage excavation in elastoplastic soils. The study validates its parallelized software, which uses a Mohr-Coulomb yield criterion and domain decomposition, by applying it to several excavation examples.

Simulation of multistage excavation based on a 3D spectral-element method

This paper details the implementation of a 3D spectral-element method to simulate the complex process of multistage excavation in elastoplastic soils. The study validates its parallelized software, which uses a Mohr-Coulomb yield criterion and domain decomposition, by applying it to several excavation examples.