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Advancement Of Optical Methods In Experimental Mechanics Volume 3: Conference Proceedings Of The Society For Experimental Mechanics

Avery Simmons

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Published in 2014th Edition Kindle Edition

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Full-Field Interferometric Techniques
Electronic Speckle Pattern Interferometry (ESPI)
Digital Image Correlation (DIC)
Holographic Interferometry
Time-Average Holographic Interferometry (TAHI)
Stroboscopic Holographic Interferometry (SHI)
Advanced Optical Methods
Shearography
Moiré Interferometry
Laser-Induced Fluorescence (LIF)
Applications in Engineering and Science
Aerospace and Automotive Industries
Civil Engineering
Materials Science
Biomedical Engineering

Experimental mechanics is the branch of engineering that deals with the analysis of forces and deformations in solids and structures. Traditional methods for measuring these quantities have relied on strain gauges, extensometers, and other contact-based sensors. However, these methods can be cumbersome, intrusive, and unable to provide full-field measurements.

In recent years, there has been a significant advancement in optical methods for experimental mechanics. These methods use light to measure displacements, strains, and other mechanical quantities without the need for physical contact. Optical methods are non-destructive, full-field, and can provide high-resolution measurements.

Full-Field Interferometric Techniques

Full-field interferometric techniques are a class of optical methods that use interference of light to measure displacements and strains. The two most common full-field interferometric techniques are electronic speckle pattern interferometry (ESPI) and digital image correlation (DIC).

Advancement of Optical Methods in Experimental Mechanics, Volume 3: Conference Proceedings of the Society for Experimental Mechanics Series

5 out of 5

Language	:	English
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Print length	:	397 pages

Electronic Speckle Pattern Interferometry (ESPI)

ESPI is a non-contact optical method that uses a laser to create a speckle pattern on the surface of an object. When the object is deformed, the speckle pattern changes, and this change can be used to measure the displacement of the object. ESPI is a versatile technique that can be used to measure both in-plane and out-of-plane displacements.

Digital Image Correlation (DIC)

DIC is a non-contact optical method that uses a camera to record images of a deformed object. The images are then analyzed to measure the displacement of the object. DIC is a powerful technique that can be used to measure both in-plane and out-of-plane displacements.

Holographic Interferometry

Holographic interferometry is a non-contact optical method that uses a laser to record a hologram of an object. When the object is deformed, the hologram changes, and this change can be used to measure the displacement of the object. Holographic interferometry is a very sensitive technique that can be used to measure very small displacements.

Time-Average Holographic Interferometry (TAHI)

TAHI is a holographic interferometry technique that uses a time-averaging process to improve the sensitivity of the measurements. TAHI is a versatile technique that can be used to measure both in-plane and out-of-plane displacements.

Stroboscopic Holographic Interferometry (SHI)

SHI is a holographic interferometry technique that uses a strobe light to freeze the motion of a vibrating object. SHI is a powerful technique that can be used to measure the vibration modes of an object.

Advanced Optical Methods

In addition to full-field interferometric techniques and holographic interferometry, there are a number of other advanced optical methods that can be used for experimental mechanics. These methods include shearography, moiré interferometry, and laser-induced fluorescence (LIF).

Shearography

Shearography is a non-contact optical method that uses a shearing interferometer to measure the derivatives of displacement. Shearography is a very sensitive technique that can be used to detect very small defects in materials.

Moiré Interferometry

Moiré interferometry is a non-contact optical method that uses a grating to create a moiré pattern on the surface of an object. When the object is deformed, the moiré pattern changes, and this change can be used to measure the displacement of the object. Moiré interferometry is a versatile technique that can be used to measure both in-plane and out-of-plane displacements.

Laser-Induced Fluorescence (LIF)

LIF is a non-contact optical method that uses a laser to excite fluorescence in a material. The fluorescence intensity is proportional to the strain in the material, and this can be used to measure the strain distribution in the material. LIF is a powerful technique that can be used to measure strain in a wide variety of materials.

Applications in Engineering and Science

Optical methods for experimental mechanics have a wide range of applications in engineering and science. These methods are used in the aerospace and automotive industries to analyze the stress and strain distributions in aircraft and automobiles. They are used in civil engineering to analyze the structural integrity of bridges and buildings. They are used in materials science to characterize the mechanical properties of materials. And they are used in biomedical engineering to analyze the mechanics of the human body.

Optical methods for experimental mechanics are a powerful tool for analyzing the stress and strain distributions in solids and structures. These methods are non-destructive, full-field, and can provide high-resolution measurements. Optical methods are used in a wide range of applications in engineering and science, and their use is only expected to grow in the future.

Advancement of Optical Methods in Experimental Mechanics, Volume 3: Conference Proceedings of the Society for Experimental Mechanics Series

5 out of 5