Featured Research

from universities, journals, and other organizations

Weaknesses In Structures -- From Massive Bridges To Nanotechnology -- Identified With New Gadget

Date:
March 8, 2008
Source:
Southeastern Louisiana University
Summary:
A new gadget can identify weaknesses in structures ranging from massive bridge construction to the tiniest elements of nanotechnology no larger than a speck of dust on a pinhead. The deformation prediction instrument uses the technology of optical interferometry to make precise measurements that identify weak spots in a wide range of materials, including metals, plastics and other products.

From left, Southeastern Louisiana University physicist Sanchiro Yoshida explains points about his patented deformation detection instrument to student assistants Christopher W. Schneider and John A. Gaffney. The instrument, Southeastern's first patent, helps detect structural weaknesses in various materials.
Credit: Randy Bergeron, Southeastern Louisiana University

A patent has been awarded to Southeastern Louisiana University through one of its faculty that holds the potential to identify weaknesses in structures ranging from massive bridge construction to the tiniest elements of nanotechnology no larger than a speck of dust on a pinhead.

The patent is for a deformation prediction instrument developed by physicist Sanichiro Yoshida. The instrument uses the technology of optical interferometry to make precise measurements that identify weak spots in a wide range of materials, including metals, plastics and other products.

Interferometry uses multiple light paths -- typically two -- from a common source, in this case a laser. The light paths allow the operator to exactly measure the difference in the path lengths when the light waves hit an object. The light waves – measuring less than one micron or one millionth of a meter – intersect on the material under study, are carefully measured and compared by the interferometer. This determines displacements of all points on the object, and through analysis of the pattern of the displacements, reveals a point of weakness in the material.

Yoshida, who has been working with light and lasers since 1983 and optical interferometry since 1994, developed the mathematical procedure that determines the actual displacement from the interferometric images. He also has a second patent pending on a related development.

“This approach allows us to be able to predict where and when fractures may occur by determining the weak spot and the remaining intact life of the material,” Yoshida explained. “This has significant applications in engineering and construction technology where we could possibly do the measurements from a distance or using portable equipment.

“It also seems to work well with very small items, such as what we see in nanotechnology,” he added. “It is very hard to predict failure in small objects because the dynamics of the structures are very different, but this device seems to work with this.”

Yoshida, who also serves as a scientist at Livingston’s (LA) Laser Interferometer Gravitational Wave Observatory where researchers are probing Einstein’s theory of gravitational fluctuations, is currently trying to develop a partnership with a software firm as the next step in further developing and perfecting the instrument. In addition, he will be working this summer under an agreement with Pennsylvania State University on the nanotechnology aspect that will also allow the institutions to exchange students and faculty.

Before the break up of the Soviet Union, Yoshida worked in Siberia with Russian scientists, whom he says developed the theory his invention is based upon. The Russian scientists were using satellite technology to measure small changes in the earth’s crust as a way of possibly predicting earthquakes. Yoshida took that theory, introduced optical interferometry, and worked to make the theory a practical tool in modern applications.

Five undergraduate students work with Yoshida in his laboratory, carrying out various experiments under his direction. Two of those students, Christopher W. Schneider of Ponchatoula and John A. Gaffney of San Pedro Sula, Honduras, will present papers on their work at the American Physical Society’s annual meeting in New Orleans in March. Preliminary experiments conducted three years ago on the first version of the optical interferometer by Rashmi Manjegowda, a former Southeastern student from India helped Yoshida confirm the validity of the patented technology.


Story Source:

The above story is based on materials provided by Southeastern Louisiana University. Note: Materials may be edited for content and length.


Cite This Page:

Southeastern Louisiana University. "Weaknesses In Structures -- From Massive Bridges To Nanotechnology -- Identified With New Gadget." ScienceDaily. ScienceDaily, 8 March 2008. <www.sciencedaily.com/releases/2008/03/080304153747.htm>.
Southeastern Louisiana University. (2008, March 8). Weaknesses In Structures -- From Massive Bridges To Nanotechnology -- Identified With New Gadget. ScienceDaily. Retrieved August 23, 2014 from www.sciencedaily.com/releases/2008/03/080304153747.htm
Southeastern Louisiana University. "Weaknesses In Structures -- From Massive Bridges To Nanotechnology -- Identified With New Gadget." ScienceDaily. www.sciencedaily.com/releases/2008/03/080304153747.htm (accessed August 23, 2014).

Share This




More Matter & Energy News

Saturday, August 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Is It a Plane? No, It's a Hoverbike

Is It a Plane? No, It's a Hoverbike

Reuters - Business Video Online (Aug. 22, 2014) UK-based Malloy Aeronautics is preparing to test a manned quadcopter capable of out-manouvering a helicopter and presenting a new paradigm for aerial vehicles. A 1/3-sized scale model is already gaining popularity with drone enthusiasts around the world, with the full-sized manned model expected to take flight in the near future. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Coal Gas Boom in China Holds Climate Risks

Coal Gas Boom in China Holds Climate Risks

AP (Aug. 22, 2014) China's energy revolution could do more harm than good for the environment, despite the country's commitment to reducing pollution and curbing its carbon emissions. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Former TSA X-Ray Scanners Easily Tricked To Miss Weapons

Former TSA X-Ray Scanners Easily Tricked To Miss Weapons

Newsy (Aug. 21, 2014) Researchers found the scanners could be duped simply by placing a weapon off to the side of the body or encasing it under a plastic shield. Video provided by Newsy
Powered by NewsLook.com
Flower Power! Dandelions Make Car Tires?

Flower Power! Dandelions Make Car Tires?

Reuters - Business Video Online (Aug. 20, 2014) Forget rolling on rubber, could car drivers soon be traveling on tires made from dandelions? Teams of scientists are racing to breed a type of the yellow flower whose taproot has a milky fluid with tire-grade rubber particles in it. As Joanna Partridge reports, global tire makers are investing millions in research into a new tire source. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins