ITAMCO Wins Air Force Contract

Runway mats are a critical component of Expeditionary Airfields (EAFs), portable airfields that can be constructed, used, broken down after the completion of a mission, and moved to another site for re-use. These portable airfield mats must be easy to install and store, yet capable of withstanding the stresses of repeated take-offs and landings of aircraft and the impact from arresting hooks. Indiana Technology and Manufacturing Companies (ITAMCO; Plymouth, IN) is part of a team developing a new runway mat for the United States Air Force. The portable runway surface most used today is made with an aluminum plank matting called AM-2 that has served the United States military well since the Vietnam War, but the materials and technology in the ITAMCO-led research project will offer many benefits over AM-2 matting.

The objective of the research is to develop a robust sheet or roll technology that serves as an alternative to the AM-2 mat for temporary or expeditionary flight operations. Scott Hartford, a project manager at ITAMCO, is working on the project with professor Pablo Zavattieri in the Lyles School of Civil Engineering / Purdue University (West Lafayette, IN). The proposed technology is comprised of an upper surface that mates with a lower surface and contains Phase Transforming Cellular Matrix (PXCM) geometry to mitigate anticipated loading and shear stresses. What is PXCM?

In the simplest terms, products made with PXCM geometry have the ability to change from one stable configuration to another stable configuration and back again. According to an article by Nadia Aljabi in the Journal of Purdue Undergraduate Research, the novelty and benefits of PXCM are that these materials can absorb important amounts of energy and yet be reusable since the phase transformation is entirely reversible without inducing permanent deformation into the base material. This means the new runway mat can “heal” itself, resulting in a much longer lifespan than a runway made with AM-2 matting. Additional benefits of the new runway material include:

• The PXCM solution is targeted to weigh 3.5 lb/sq ft or less.
• It can be laid by hand over a level surface of the appropriate density.
• Debris on the runway will not hamper the runway’s performance.
• It will support flight operations of 5,000 landing and takeoff cycles over 60 days.

The construction of the proposed runway mat is as innovative as its use of PXCM geometry – the prototypes of the mat will be made on an ITAMCO EOS M290 additive manufacturing printer. The 3D printing method will be a collaboration between an innovative metal powder called StainlessSteel 316L VPro and the unique additive manufacturing capabilities of the M290 printer. This union between product and printer will reduce production time by 70 percent and cost by up to 50 percent. “EOS StainlessSteel 316L VPro is a highly productive material that was born from our collaborate development effort with GKN. Applications using 316L VPro, combined with highly proven EOS metal 3D printing technologies, result in accelerated production with lower production costs,” said Patrick Boyd, the marketing director of EOS North America (Electro Optical Systems; Novi, MI). “We’re excited that they have partnered with us in their endeavors to create forward-thinking solutions. They are not afraid to engineer then employ extraordinary systems where no solution previously existed.”

Pushing boundaries with innovative materials and state-of-the-art printers does not guarantee build success, however, so the team is using Sunata™ cloud-based software from Atlas 3D (Plymouth, IN) to optimally orient and support the PXCM geometry. “The additive markets continue to evolve with new materials and unique geometries like PXCM on a near daily basis,” noted Chad Barden, the chief executive officer of Atlas 3D. “If not managed properly, these new variables can lead to scrap, rework, and loss of time to market. Sunata will ensure build success and is an integral part of this project.”

www.itamco.com