Finite Element Analysis

Publications

Lean Provisioning of Form Dies for Aircraft Stringers on the 737-800

This paper examines supply chain improvements at Boeing's Tooling Manufacturing Business Unit and investigates an improved design approach for stringer dies. Crucially, a Finite Element Analysis was employed to determine more accurate overbends for springback in stringer forming, demonstrating the significant role of computational simulation in optimizing manufacturing processes and reducing rework.

Stress Intensity Factor Solutions for Narrow Plates

M. J. Hammond, S. A. Fawaz.

This technical paper focuses on expanding the solution space for stress intensity factors (SIFs) in damage tolerant structures through an extensive analytical investigation using Finite Element Analysis (FEA). It details the calculation of SIFs for various crack geometries and loading conditions in finite width plates, utilizing a three-dimensional virtual crack closure technique and high-fidelity hexahedral element meshes to provide more accurate and comprehensive data than existing empirical s

MODELLING EVOLUTION OF ANISOTROPY IN METALS USING CRYSTAL PLASTICITY

Ondrej Chaloupka

This work presents a Crystal Plasticity Finite Element Method (CPFEM) tool integrated into DYNA3D® for simulating large deformations in metals and tracking the evolution of their anisotropy. This computational approach offers a cost-effective alternative to experimental material testing, particularly for understanding dynamic finite deformations.

Delamination Damage in Carbon Fiber Laminates

George Rodriguez

This technical paper presents a Finite Element Modeling approach to analyze delamination damage in carbon fiber laminates under low-velocity impact. The FE models are rigorously compared with experimental data obtained through nondestructive vibrothermography, demonstrating the efficacy of computational simulations in predicting and understanding complex damage mechanisms in composite materials.

FEM of Material Damage in Axially- Loaded Aluminum Tubes with Circular Hole Discontinuities

Bryan Arnold and William Altenhof

This technical paper presents a Finite Element Modeling approach using LS-DYNA to simulate the axial crushing and material damage of aluminum tubes with circular hole discontinuities, aiming to understand their load management and energy absorption characteristics. The FE simulations incorporate a damage mechanics material model, calibrated and validated against experimental crush tests, demonstrating a good correlation in predicting collapse modes and peak buckling loads.