Defense

August 14, 2013

Army Research Lab, Purdue explore 3-D printing to fix deployed equipment, cut maintenance costs

T'Jae Gibson
Aberdeen Proving Ground, Md.

New technology being developed by research engineers at the U.S. Army Research Laboratory and Purdue University will soon help just about any soldier deployed in far-off locations to immediately spot and fix damaged aircraft and ground vehicle parts.

Researchers found that combining the general purpose, finite-element analysis software ABAQUS with Python, an open-source code used to optimize logical structures such as topologically interlocked structures, improves energy absorption and dissipation, productivity and lower maintenance costs.

The combination of ABAQUS and Python provides an automated process for auto-generation of the geometries, models, materials assignments and code execution, said Ed Habtour, a research engineer with U.S. Army Research Laboratory’s, or ARL’s, Vehicle Technology Directorate at Aberdeen Proving Ground, Md.

He said the code is developed to assist designers with tools to model the new generation of 3-D additive manufactured and TISs structures.

“The benefit for the soldier is an after-effect,” Habtour said. “The TIS would provide an excellent energy absorption and dissipation mechanism for future vehicles using additive manufacturing. Subsequently, the Soldier can print these structures in the field using additive manufacturing by simply downloading the model generated by the designer/vendor.”

The research team developed logical structures from the mini-composition of tetrahedron-shaped cells in existing materials, an approach ARL research engineers say is a vast departure from the military’s tendency to build new materials to meet existing problems.

“Traditionally, every time the U.S. Army encounters a problem in the field the default has been to develop new and exotic materials. Using logical structures can be effective in solving some critical and challenging problems, like the costly and time-consuming certification process that all new materials must face,” Habtour said.

This logical structure is based on principles of segmentation and assembly, where the structure is segmented into independent unit elements then reconfigured/assembled logically and interlocked in an optimal orientation to enhance the overall properties of the structure, Habtour explained.

The researchers are focusing on topologically interlocked structures using VTD’s 3-D additive manufacturing approach to build 2-D and 3-D structures based on cells in the shape of Platonic solids.

Habtour said new structures created from this process are designed to be adaptive and configurable to the harsh conditions like random and harmonic vibrations, thermal loads, repetitive shocks due to road bumps, crash and acoustic attenuation. An added bonus he said is that these structures are configured to prevent crack propagation.

“Sometime in the near future, Soldiers would be able to fabricate and repair these segmented structures very easily in the front lines or Forward Operating Bases, so instead of moving damaged ground or air vehicles to a main base camp for repair, an in-field repair approach would essentially mean vehicles would be fixed and accessible to war fighters much faster at lower costs,” said Habtour. “We want to change the conventional thinking by taking advantage of exciting materials and manipulating the structure based on the principle of segmentation and assembly.”

ARL is working closely with project managers at The U. S. Army Aviation and Missile Research Development and Engineering Center. Discussions are already underway to transition this work to AMRDEC and Tank Automotive Research, Development and Engineering Center developmental programs.




All of this week's top headlines to your email every Friday.


 
 

 
Air Force photograph by Scott M. Ash

AF leaders seek relief from sequestration-level funding

Air Force photograph by Scott M. Ash Secretary of the Air Force Deborah Lee James and Air Force Chief of Staff Gen. Mark A. Welsh III testify before the House of Representatives Committee on AppropriationsĂ­ Defense Subcommitte...
 
 
navy-china

USS Fort Worth conducts CUES with Chinese Navy

The littoral combat ship USS Fort Worth (LCS 3) practiced the Code for Unplanned Encounters at Sea (CUES) with the People’s Liberation Army-Navy Jiangkai II frigate Hengshui (FFG 572) Feb. 23 enhancing the professional ma...
 
 

AEGIS tracks, simulates engagement of three short-range ballistic missiles

The Missile Defense Agency and sailors aboard the guided-missile destroyers USS Carney (DDG 64), USS Gonzalez (DDG 66), and USS Barry (DDG 52) successfully completed a flight test involving the Aegis Ballistic Missile Defense weapon system. At approximately 2:30 a.m., EST, Feb. 26, three short-range ballistic missile targets were launched near simultaneously from NASA’s Wallops...
 

 

DOD seeks novel ideas to shape its technological future

The Defense Department is seeking novel ideas to shape its future, and officials are looking to industry, small business, academia, start-ups, the public – anyone, really – to boost its ability to prevail against adversaries whose access to technology grows daily. The program, called the Long-Range Research and Development Plan, or LRRDP, began with an...
 
 

Air Force places 18 A-10 aircraft into ‘Backup Status’

The Air Force, with congressional authorization, will convert 18 primary combat-coded A-10 Thunderbolt II aircraft from active units and place them into Backup-Aircraft Inventory status with the possibility to convert another 18 at a later date in fiscal year 2015. The secretary of Defense has authorized the Air Force to place up to a total...
 
 

AFRL shape-changing materials make form a function

Air Force Research Laboratory research is shaping the future of aerospace. Through research into soft materials called liquid crystal elastomers, AFRL scientists have developed a method to locally program the mechanical response in polymer sheets without the use of actuators and traditional mechanical parts. This research (sponsored by the Air Force Office of Scientific Research)...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>