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AMMO WG Teleconference Minutes – 7 March 2018

On 7 March 2018, the Additive Manufacturing Maintenance Operations (AMMO) working group conducted a teleconference with over 50 participants.  A summary follows:


3D Manufacturing Techniques – IsoTruss Industries Carter Smith briefed the group on a 3D Manufacturing technique developed by NASA and Brigham Young University Research Center about 20 years ago. IsoTruss Industries, located in Utah, purchased the technology about 10 years ago, with the goal to leverage the technology into the commercial market. IsoTruss® grid structures minimize structural weight through the longitudinal and helical members. The primary role of longitudinal members is to carry axial forces and bending moments. The primary role of the helical members is to stabilize longitudinal members, carry torsion, and carry transverse shear forces. The IsoTruss uses about a fourth of carbon-tube material, which lowers the cost of a full carbon tube by 75%. The reduced weights equates to the reduced cost, and allows for simple transportation and installation. The IsoTruss has zero corrosion properties; therefore, it is able to withstand humidity, sea, etc. IsoTruss is not only for towers but also currently on military bases, street signs, offshore oil platforms, aircraft structures, solar array booms, and much more.

Generation I, at BYU, is extremely labor intensive with the winding and wrapping process. IsoTruss Industries has expanded the IsoTruss through a 3D Braiding Machine, to allow for continuous printing.


The machine has five sub-systems:

(1) Weaving and braiding system to facilitate spool movements between any two points and enables production of any lattice configuration.

(2) Transition system that guides fibers from weaving/braiding system onto shaping system and ensures proper transition into correct geometry.

(3) Shape definition system maintains tension during curing and is easily configured for different lattice geometries.

(4) Curing system is a rapid curing of the IsoStructures™ and is a continuous process.

(5) Pulling system applies tension forces in tows and progresses lattice structures.


In order to perform this testing the specimens needed to be manufactured.  The specimens were manufactured on a prototype automated continuous manufacturing IsoTruss machine.  The general idea is that the core member fibers are pulled through the machine wall that has bobbins of fiber that create the sleeve and provide the needed consolidation of fibers. There are five moving part systems on AN1 (3D Braiding Machine); the creel spool, mandrel pusher, shaft/gear, switch box, and bobbin. The hook/oven system allows for continuous IsoTruss manufacturing. fully cured, flexible, and prepreg resin cures in 5 min at 284°F. The main problem is that they need to design oven implementation, by time and effort.

Currently, IsoTruss Industries are in the development of AN2 (allows 3D manufacturing of several structures) machine. This will allow changes in the shape and size at any time on the machine, and ultimately being easily programmable. The development of a mechanical/robotic hook system would allow hooks to define nodal positions or the shape of the structure and enables configurations with external longitudinals. The AN2 would be the exact same the AN1 in regards to the creel, switch systems, etc. The projective cost would be $0.25/ft at 3 linear feet per minute excluding the cost of the raw materials. The AN2 machine would be able to fit in a shipping container allowing it be extremely portable to customer site.


AM Workshop – OSD(MPP)  – Greg Kilchenstein briefed the group on the upcoming 30-31 May 2018 AM Workshop at the Lockheed Martin Global Vision Center in Crystal City, VA. The two-day workshop is expected to be the next step in the AM implementation into the Department.


The workshop will have six teams:

  • Follow-on Development of AM Contracting Guide for DoD

Abstract:  There is a need for a singular source, or guide, that lays out the various business models and methods of acquisition for AM-related products and services, so that DoD is able to maximize the value of AM investments, and ensure interoperability of this game-changing technology. The guide will incorporate recent government-industry collaboratively developed products at the OSD AM Wargames, the Naval AM Technical Interchange and other similar efforts.

Working Group Lead: CAPT Armen Kurdian


  • Development of Acquisition Policy Language for AM

Abstract:  There is a need to develop acquisition policy that considers the unique manufacturing capabilities that AM provides to the Department and Services. In addition, how DoD can best utilize those capabilities to improve the effectiveness and efficiencies of sustaining DoD weapon systems.

Working Group Lead:  COL Howard Marotto


  • Determine How to Secure Data Transmission for AM and the Digital Thread

Abstract:  This working group will consist of government and industry members working to identify measures that secure data transmissions such as technical data package (TDP) sharing and data transfer amongst AM machines within the digital infrastructure. The group will explore the Blockchain technology and its capabilities to verify and record digital transactions, and its’ application in contracting and property ownership.

Working Group Lead: TBD


  • Pathfinder Scenario Study of AM Repair Part

Abstract:  This working group will conduct an End-to-End “Pathfinder” study that looks at the DoD AM repair part process from requirement determination, through contracting, design and manufacturing, certification and qualification, and delivery. The working group will be comprised of personnel with varying fields of expertise to include contracting, finance, logistics, engineering, and information technology. The study may involve a wargame type scenario involving a specific repair part moving through the entire process.

Working Group Lead is TBD at DLA HQ.



  • 3D Model Exchange

Abstract:  This working group will examine the development of a 3D-Model/Print Exchange that provides 3D-models for 3D-Printers to assist sustainment professionals in maintaining and sustaining their equipment.  The exchange would provide an environment to create and share 3D-printable models, modeling tutorials, and educational material.  This ability to share 3D-model data within a library of files has the potential to reduce costs and lead-times for maintenance and sustainment of equipment and a reduction in cost of supply, transportation, and distribution channels for repair parts.

Working Group Lead is TBD.


  • Intellectual Property

Abstract: Obtaining technical data packages (TDPs) in support of 3D printing will often require DoD to gain access to intellectual property (IP) from industry.  Commercial industry has growing concerns about managing, protecting, and transferring IP in support of AM.  This working group will examine the requirements and processes involved with establishing a central repository for IP associated with AM. The group will discuss key elements such as accessing and sharing IP files, data protection and cybersecurity, data format and validation, brand assurance, managing the repository, and other key responsibilities.

Working Group Lead is TBD


Registration for the two-day AM Workshop will open next Friday, March 16 at


Mx and Sustainment Advisory Group Update – Lockheed MartinMarilyn Gaska provided the following update from the 16 February telecon:

  • AM Workshop planning update from Greg Kilchenstein
  • Dave Siddle, NCDMM MAMLS PM, briefed on the Maturation of Advanced Manufacturing for Low-Cost Sustainment Phase II
  • Susan Moehring briefed the update of the AM M&S Parts Classification for AM Working Group
  • Aircraft Airworthiness and Sustainment Conference is April 23-26 in Jacksonville, FL.
  • RAPID + TCT is April 23-26, 2018 in Fort Worth, TX
  • Next monthly telecon will be March 16 at 11:00AM EST.


Next Meeting: – The next AMMO WG call is scheduled for 10:30-12:00 am (Eastern Time) on Wednesday, 4 April 2018.


POC for this action is Ashley Mitchell, LMI,, (571) 209-2629






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Date(s) - 03/07/2018
10:30 AM - 12:00 PM