Related Experiment Video
Updated: Sep 3, 2025
09:02
Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
Published on: January 31, 2025
612
On the Identification of Orthotropic Elastic Stiffness Using 3D Guided Wavefield Data
Adil Han Orta1, Mathias Kersemans2, Koen Van Den Abeele1
1Wave Propagation and Signal Processing (WPSP), Department of Physics, KU Leuven-Campus Kulak, 8500 Kortrijk, Belgium.
Sensors (Basel, Switzerland)
|July 27, 2022
Summary
Incorporating in-plane velocity measurements significantly improves the accuracy of determining orthotropic elastic stiffness parameters. This advancement enhances material characterization using 3D scanning laser Doppler vibrometry.
Area of Science:
- Materials Science
- Mechanical Engineering
- Non-Destructive Testing
Background:
- Scanning laser Doppler vibrometry (SLDV) is crucial for assessing material properties and detecting defects.
- Advancements in 3D SLDV provide access to both out-of-plane and in-plane vibrational velocity components.
- Accurate determination of orthotropic elastic stiffness is vital for material design and performance analysis.
Purpose of the Study:
- To investigate the impact of using in-plane and out-of-plane velocity components on the inverse determination of orthotropic elastic stiffness parameters.
- To compare the effectiveness of using only out-of-plane, only in-plane, or both components for stiffness parameter identification.
- To evaluate the robustness and accuracy of different measurement approaches.
Main Methods:
- Numerical simulations using a finite element model (COMSOL) and experimental measurements with a 3D infrared SLDV.
- Conversion of full-field vibrational velocity data to the frequency-wavenumber domain via Fourier transform.
- Extraction of complex wavenumbers using the matrix pencil decomposition method.
- Development of an inversion procedure coupling the semi-analytical finite element (SAFE) method with a particle swarm optimizer to infer the orthotropic elastic stiffness tensor.
Main Results:
- The study analyzed carbon epoxy composite and wood materials.
- Accounting for the in-plane velocity component resulted in a more accurate determination of orthotropic elastic stiffness parameters.
- The inclusion of in-plane data enhanced the robustness of the stiffness parameter identification process.
Conclusions:
- The in-plane vibrational velocity component is essential for accurate and robust inverse determination of orthotropic elastic stiffness.
- 3D SLDV, by capturing in-plane motion, offers superior material characterization capabilities compared to traditional out-of-plane measurements.
- This research provides a refined methodology for non-destructive evaluation and material property estimation.
Keywords:
Lamb wavescompositesmaterial characterizationnon-destructive testingorthotropyparticle swarm optimizationwoodsMore Related Videos
04:51Author Spotlight: Characterizing Environmental Biofilm Mechanics Using Optical Coherence Elastography and its Applications in Wastewater Treatment
Published on: March 1, 2024
1.1K
10:26AFM-based Mapping of the Elastic Properties of Cell Walls: at Tissue, Cellular, and Subcellular Resolutions
Published on: July 24, 2014
13.1K
Related Concept Videos
01:20Elastic Strain Energy for Shearing Stresses
274
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...
274
01:15Strain and Elastic Modulus
4.0K
The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
4.0K
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
322
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
322
01:08Bending of Members Made of Several Materials
253
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
253
01:22Elastic Strain Energy for Normal Stresses
256
Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
If...
If...
256
01:19Members Made of Elastoplastic Material
151
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
As the bending moment...
151