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.


 
 

 

Headlines July 28, 2014

News: U.S. has lost track of weapons given to Afghanistan - The United States supplied almost three quarter of a million weapons to Afghanistan’s army and police since 2004, but the military cannot track where many of those arms have gone, a new report found. Bill to improve VA has $17 billion price tag - A bipartisan...
 
 

News Briefs July 28, 2014

Marines seek authorization for dolphin deaths The Marine Corps is asking for a five-year authorization from the National Marine Fisheries Service for incidental deaths of bottlenose dolphins during training exercises at a bombing and target range. The Sun Journal of New Bern, N.C., reports that Connie Barclay of the National Oceanic and Atmospheric Administration says...
 
 
Army photograph by David Vergun

Senior leaders explain Army’s drawdown plan

Army photograph by David Vergun No commander is happy when notified that a soldier from his or her command has been identified for early separation. But commanders personally notify those Soldiers and ensure participation in th...
 

 

Northrop Grumman awarded mission support services contract

The U.S. Army awarded Northrop Grumman a cost-plus-fixed-fee contract, with a potential value of $205 million, to continue providing mission logistics services in support of combat brigades training at the National Training Center in Fort Irwin, Calif. The contract covers one base year and two one-year options. Support will include the full range of mission...
 
 
Lockheed Martin photograph by Beth Groom

F-35 Rollout Marks U.S.-Australia Partnership Milestone

Lockheed Martin photograph by Beth Groom Royal Australian Air Force Air Marshal Geoff Brown delivers his remarks at the roll out ceremony for Australia’s first F-35. The official rollout of the first two F-35 Lightning II...
 
 
NASA/JPL-Caltech image

NASA’s Mars spacecraft maneuvers to prepare for close comet flyby

NASA/JPL-Caltech image This graphic depicts the orbit of comet C/2013 A1 Siding Spring as it swings around the sun in 2014. On Oct. 19, the comet will have a very close pass at Mars. Its nucleus will miss Mars by about 82,000 m...
 




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>