Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Principal Stresses in a Beam01:11

Principal Stresses in a Beam

776
In prismatic beams subject to arbitrary transverse loading, It is essential to analyze the interaction between shear forces and bending moments in order to understand stress distribution and ensure structural integrity. The highest normal or bending stress occurs at the outer fibers of the beam, decreasing linearly to zero at the neutral axis. In contrast, shear stress peaks at the neutral axis and diminishes toward the outer surfaces.
Analyzing principal stresses is crucial, especially in...
776
Beams with Symmetric Loadings01:15

Beams with Symmetric Loadings

451
The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
451
Shearing Stresses in a Beam: Problem Solving01:14

Shearing Stresses in a Beam: Problem Solving

709
A cantilever beam with a rectangular cross-section under distributed and point loads experiences shearing stresses. The analysis begins by identifying the loads acting on the beam. Then, the reactions at the beam's fixed end are calculated using equilibrium equations. The vertical reaction is a combination of the distributed and point loads, while the moment reaction is the sum of their moments. The shear force distribution along the beam, resulting from these loads, is established by creating...
709
Deflection of a Beam01:19

Deflection of a Beam

795
Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
795
Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

647
The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
647
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

465
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
465

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Trauma under psychedelics: how psychoactive substances impact trauma processing.

World psychiatry : official journal of the World Psychiatric Association (WPA)·2025
Same author

Forward Brillouin scattering in few-mode fibers.

Light, science & applications·2025
Same author

The Body Knows Better: Sensorimotor signals reveal the interplay between implicit and explicit Sense of Agency in the human mind.

Cognition·2024
Same author

High-energy picosecond pulses with a single spatial mode from a passively mode-locked, broad-area semiconductor laser.

Optics express·2023
Same author

The bodily self from psychosis to psychedelics.

Scientific reports·2023
Same author

Measuring glass transition of a polymer coating layer over working fiber using forward Brillouin scattering.

Optics letters·2023

Related Experiment Video

Updated: Feb 21, 2026

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

10.7K

Brillouin Optical Correlation Domain Analysis in Composite Material Beams.

Yonatan Stern1, Yosef London2, Eyal Preter3

  • 1Faculty of Engineering and Institute for Nano-Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel. sternyyy@gmail.com.

Sensors (Basel, Switzerland)
|October 5, 2017
PubMed
Summary

This study introduces high-resolution distributed Brillouin sensing for composite structural health monitoring. The technique provides continuous temperature and strain data, overcoming limitations of traditional point-sensing methods.

Keywords:
Brillouin optical correlation domain analysisBrillouin sensorscomposite beamscomposite materialsoptical fiber sensorsstrain measurementsstructural health monitoring

More Related Videos

Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy
07:19

Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy

Published on: September 15, 2016

11.1K
High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
13:31

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

15.8K

Related Experiment Videos

Last Updated: Feb 21, 2026

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

10.7K
Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy
07:19

Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy

Published on: September 15, 2016

11.1K
High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
13:31

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

15.8K

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Optical Sensing

Background:

  • Structural health monitoring (SHM) is crucial for composite materials.
  • Current methods often use point-sensing or limited area coverage for temperature and strain.
  • Spatially-continuous data acquisition is needed for comprehensive SHM.

Purpose of the Study:

  • To demonstrate high-resolution distributed Brillouin sensing in embedded standard optical fibers for composite SHM.
  • To develop and validate a portable measurement setup for real-world composite manufacturing environments.
  • To assess the capability of the system for monitoring composite production, material property estimation, and in-situ strain analysis.

Main Methods:

  • Employed a phase-coded Brillouin optical correlation domain analysis (B-OCDA) protocol.
  • Achieved a spatial resolution of 2 cm and sensitivity of 1 °K (temperature) or 20 micro-strain.
  • Integrated standard optical fibers within composite structures for embedded sensing.

Main Results:

  • Successfully monitored the production and curing of a composite beam over 60 hours.
  • Accurately estimated stiffness and Young's modulus of a composite beam.
  • Performed distributed strain measurements on a model unmanned aerial vehicle wing surface.
  • Measurement results were consistent with structural analysis predictions.

Conclusions:

  • High-resolution distributed Brillouin sensing offers significant advantages for composite SHM.
  • The portable B-OCDA system enables continuous, spatially resolved monitoring during manufacturing and operation.
  • This technology has strong potential for enhancing the safety and reliability of composite structures.