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Related Experiment Video

Updated: May 29, 2026

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
11:28

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials

Published on: May 18, 2015

Multiple-mode Lamb wave scattering simulations using 3D elastodynamic finite integration technique.

Cara A C Leckey1, Matthew D Rogge, Corey A Miller

  • 1NASA Langley Research Center, Hampton, VA, USA. cara.ac.leckey@nasa.gov

Ultrasonics
|September 13, 2011
PubMed
Summary
This summary is machine-generated.

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As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...

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Three-dimensional (3D) elastodynamic finite integration technique (EFIT) simulations accurately model Lamb wave scattering from complex flaws in aluminum plates. These advanced simulations provide crucial insights into multi-mode wave behavior in challenging, high-frequency regions.

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Computational Mechanics

Background:

  • Lamb wave propagation is crucial for non-destructive testing (NDT) of aerospace structures.
  • Interpreting multi-mode Lamb wave scattering in complex flaw scenarios remains a challenge.

Purpose of the Study:

  • To model and understand Lamb wave scattering from two distinct flaw types in an aluminum plate using 3D EFIT simulations.
  • To investigate the influence of flaw geometry and depth on multi-mode Lamb wave behavior.
  • To validate simulation accuracy against experimental data and assess the limitations of 2D models.

Main Methods:

  • Implementation of three-dimensional (3D) elastodynamic finite integration technique (EFIT) simulations.
  • Modeling of two flaw types: a rounded rectangle flat-bottom hole and a disbond.

Related Experiment Videos

Last Updated: May 29, 2026

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
11:28

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials

Published on: May 18, 2015

  • Systematic variation of flaw depth for the flat-bottom hole.
  • Comparison of simulation results with experimental data for the flat-bottom hole.

    • Main Results:

    • 3D EFIT simulations successfully modeled complex Lamb wave scattering, providing insight into experimental waveforms.
    • Significant differences in Lamb wave scattering were observed between the flat-bottom hole and disbond flaws.
    • Simulations demonstrated the capability to analyze scattering in higher frequency-thickness regions where multiple modes exist.
    • Results confirmed that 2D simulations are insufficient for capturing the intricate scattering phenomena observed.

    Conclusions:

    • Benchmarked 3D EFIT simulations are effective for understanding Lamb wave scattering from complex flaws in aluminum plates.
    • These simulations offer valuable insights into multi-mode wave behavior in regions difficult to study experimentally.
    • 3D modeling is essential for accurately analyzing complex Lamb wave scattering phenomena in NDT applications.