Finite Element Analysis

Publications

Solid Model Design Simplifications

This paper details an investigation into simplifying complex CAD solid models to make them usable for downstream applications. It describes the development of prototype software tools designed to detect and eliminate problematic geometric features that cause failures in Finite Element analysis meshing programs.

Statistical Fatigue and Residual Strength Analysis of New/Aging Aircraft Structure

S.Fawaz and B.Anderson

This work describes a method for robust fatigue life prediction in aircraft by using a "splitting scheme" and the Finite Element Method to analyze complex, multi-crack scenarios. The approach efficiently calculates stress intensity factors, making large-scale statistical fatigue analysis practical for improving fleet management.

Fast and Reliable Solution of GDoF-Problems on NAVO/BABBAGE and AFRL/HAWK Systems

S.Fawaz and B.Anderson

This study details a specialized direct solver and a domain decomposition-based Finite Element methodology for solving Giga-Degree-of-Freedom structural analysis problems to enable reliable statistical fatigue and residual strength predictions for aging aircraft.

Impact Corner of the Barge During Its Glancing Blow Impact With a Lock Approach Wall

Robert M. Ebeling and Terry W. Warren

This report details a series of nonlinear Finite Element analyses conducted with LS-DYNA to determine the limiting impact force of a barge corner crushing during a glancing blow with a lock approach wall. A detailed FEA model of a barge bow, using over 177,000 shell elements and a nonlinear plastic material model, was subjected to simulated impacts to establish a "capping force" for existing design correlations.

Detailed 3D Modeling and Simulation of Bolted Connections

A.M. Citipitioglu and R.M. Haj-Ali

This paper presents a detailed three-dimensional Finite Element methodology using ABAQUS to simulate the nonlinear behavior of bolted steel connections by explicitly modeling contact, friction, and bolt pretension. The FEA models are validated against experimental data and then used to conduct parametric studies, demonstrating the approach's capability to accurately predict moment-rotation response and investigate component interactions.