Featured Research

from universities, journals, and other organizations

Undergrads Build Device For Army Combat Simulations

Date:
May 20, 1999
Source:
Johns Hopkins University
Summary:
Three undergraduate engineers at Johns Hopkins have invented a device to help the Army test the combat-durability of critical electronic and mechanical parts.

Air-Powered Projectile Delivers Data to Help Gauge Durability of Military Equipment

When an artillery shell explodes near an armored vehicle, the shock waves can damage or disrupt critical electronic and mechanical parts inside. To help U.S. Army researchers predict how well their equipment will survive such blasts, three undergraduate engineering students at The Johns Hopkins University have designed and built an air-powered hammering device that can repeatedly deliver up to 45,000 pounds of force to a slab of metal.

The U.S. Army Research Laboratory plans to use this invention to check the accuracy of computer models that are used to forecast what will happen to armored vehicle equipment when it is hit by even more powerful forces on a real battlefield. In the past, Army researchers have validated their computer results by using a hand-held nail gun capable of delivering up to 35,000 pounds of force. But the nail gun is inconsistent and difficult to adjust. Last fall, Army researchers asked mechanical engineering students at Johns Hopkins to devise a safe, reusable and more reliable device that could pound the target with even greater force.

The 22-year-old seniors -- Kevin Turner, of Brielle, N. J.; Ryan Thimatariga, of Lutherville, Md.; and Hal von Brockdorff, of Garden City, N.Y. -- recently finished building the explosive loading simulator and successfully tested it in a university lab. The cannon-like device features a cylindrical breech chamber that collects pressurized air and a narrow barrel that houses a projectile. When a valve is opened, the change in air pressure sends the tip of the aluminum-and-plastic projectile hammering into a 2-inch-thick aluminum slab. A safety plate prevents the entire projectile from leaving the barrel. A sensor on the target, connected to an oscilloscope, measures the force as a function of time.

The explosive load simulator was one of 12 Johns Hopkins projects completed this year by undergraduate teams in the Whiting School of Engineering's Design Project course taught by Andrew F. Conn, a Johns Hopkins graduate with more than 25 years of experience in public and private research and development. Each team of two or three students, working within a budget of up to $8,000, had to design a device, purchase or fabricate the parts, and assemble the final product. Corporations, government agencies and nonprofit groups provided the assignments and funding.

In the past, Conn's students have developed a "safer" handgun that does not fire in the hands of an unauthorized user, an infra-red mouth-held device that allows a paraplegic to operate a computer from a bed, an automatic wheelchair brake; a bicycle helmet that offers more protection than commercial headgear, and a wheelchair lift powered by a van's exhaust.

The explosive load simulator project was sponsored by Morris Berman, a mechanical engineer with the Army Research Laboratory's Composites and Lightweight Structures Branch in Adelphi, Md. Although more testing must be done, Berman said he was impressed by the students' design for the high-pressure pounding device. "This looks like a neat way of accomplishing the task," Berman said. "Having been an engineering student, it would have been nice to have been able to work on a project like this that would actually be used in the real world, instead of just designing something on paper. The Army hopes to use this device to build confidence in the computer models we use to predict how well parts and equipment will perform in armored vehicles on the battlefield."

Before building the load simulator, the students had to figure out the best way to generate the hammering force requested by the Army. "We threw out a lot of ideas about how to move the projectile," Turner recalled. "One option was to use springs. But we decided it would be better to use compressed air. Then we had to build something to pump the air into, and then transfer it into useful energy."

Thimatariga added, "It was a really good experience. It gave us a chance to apply the things we had learned in our classes over the previous three years."

Von Brockdorff agreed. "It was a chance to put to work many of the things we were learning about in our classes here at Johns Hopkins."

###

Color slides available of the students and their device; contact Phil Sneiderman at the phone number or addresses above.


Story Source:

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


Cite This Page:

Johns Hopkins University. "Undergrads Build Device For Army Combat Simulations." ScienceDaily. ScienceDaily, 20 May 1999. <www.sciencedaily.com/releases/1999/05/990519074840.htm>.
Johns Hopkins University. (1999, May 20). Undergrads Build Device For Army Combat Simulations. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/1999/05/990519074840.htm
Johns Hopkins University. "Undergrads Build Device For Army Combat Simulations." ScienceDaily. www.sciencedaily.com/releases/1999/05/990519074840.htm (accessed October 20, 2014).

Share This



More Matter & Energy News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Gulfstream G500, G600 Unveiling

Gulfstream G500, G600 Unveiling

Flying (Oct. 20, 2014) Watch Gulfstream's public launch of the G500 and G600 at their headquarters in Savannah, Ga., along with a surprise unveiling of the G500, which taxied up under its own power. Video provided by Flying
Powered by NewsLook.com
Japanese Scientists Unveil Floating 3D Projection

Japanese Scientists Unveil Floating 3D Projection

Reuters - Innovations Video Online (Oct. 20, 2014) Scientists in Tokyo have demonstrated what they say is the world's first 3D projection that floats in mid air. A laser that fires a pulse up to a thousand times a second superheats molecules in the air, creating a spark which can be guided to certain points in the air to shape what the human eye perceives as an image. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
What We Know About Microsoft's Rumored Smartwatch

What We Know About Microsoft's Rumored Smartwatch

Newsy (Oct. 20, 2014) Microsoft will reportedly release a smartwatch that works across different mobile platforms, has a two-day battery life and tracks heart rate. Video provided by Newsy
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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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