NetComposites
Thermwood

Elastic Memory Composite Hinge Could Protect Objects Deployed in Space

19 February 2007

Air Force Materiel Command's Space Vehicles Directorate and Composite Technology Development, Inc., have developed a technology that could minimise the shock associated with current deployment systems.

Current deployment mechanisms operating aboard spacecraft primarily consist of heavy springs which, when activated, inflict shock to components such as solar arrays and antennae. This often hinders the equipment's efficiency in the harsh environment of space.

Their efforts have led to the Elastic Memory Composite Hinge, which is comprised of a mixture of carbon fibre strands and an epoxy resin. EMCH operates by temperature application, becoming pliable when heated and then maintaining a stiff position while cooling.

EMCH has demonstrated a gradual, controlled functionality that protects the item it will deploy. For example, during launch when intense shaking can occur within the rocket body, the hardened compound material restricts the movement of deployable objects, but once the spacecraft reaches orbit, the opposite transpires as increased temperatures from the sun or an internal energy source placed on the apparatus creates elasticity.

EMCH, is undergoing evaluation on the International Space Station. It was on board Space Shuttle Discovery when the shuttle docked with the International Space Station in December 2006. A crew member transferred the EMCH demonstration, which involved a clear self-contained, Plexiglas box, measuring 10 inches by 20 inches by 17 inches, featuring three sets of tests with two hinges apiece. It's scheduled to remain on the International Space Station for 18 months.

According to 1st Lt. Corey Duncan, EMCH program manager, EMCH serves as a low-mass, low-complexity replacement for current deployment mechanisms.

""Additionally, these hinges will mitigate spacecraft shock that is typically experienced in deployment devices."" Lieutenant Duncan said. ""If the EMCH's performance is validated during its stint on the International Space Station, it will reduce the risk of shake, rattle, and roll to future space programs, as well as to the next generation of vehicles operating in the cosmos.""

The Space Vehicles Directorate, one of nine technology directorates under the Air Force Research Laboratory, sponsored the EMCH project. Composite Technology Development, Inc., designed, advanced, and tested the EMCH system.





Share this story


Related / You might like...

Elemental RP1 Sports Car Showcases Capabilities of Tailored Fibre Placement

Designers at Elemental Motor have utilised tailored fibre placement (TPF) to extend the use of carbon composites in its RP1 sports car.

Porcher Industries Exhibits at CAMX 2018

Porcher Industries and its US subsidiary BGF Industries will present their latest innovations at CAMX 2018 on 15-18 October in Dallas, Texas, US, including new dry fibres for aerospace and automotive applications, the STELIA thermoplastic fuselage demonstrator, and solutions for the industrial, construction and sports and leisure sectors.

Composites One Demonstrates Processing Advances at CAMX 2018

Composites One and the Closed Mold Alliance, along with more than 15 industry partners, will demonstrate the latest advancements in closed moulding and advanced processes for building real-life parts for marine, aerospace and other markets during CAMX 2018 in Dallas, Texas, US, on 16-18 October.