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  Systems Engineering Portfolio
Shape Memory "Smart" Fasteners
Removable, Reusable, Rapid-Release Fasteners
CRG’s new rapid-release, shape memory
fastening technology uses the unique properties of Veriflex®,
a shape memory polymer (SMP) material. At a specific temperature,
this material changes from a rigid state to an elastic state
and then returns to a rigid “memorized” state
again.
When the rapid release system is activated,
the fasteners become flexible, allowing simple, snap-on attachment.
Once fastened, the system returns to a rigid state, locking
the fasteners in place. To detach the fasteners again, the
user simply activates the system, transitioning the material
back to an elastic state, allowing easy removal. This process
can be repeated over and over again. The  material is simply
activated by heat and reduces the labor and time needed to
attach and replace devices.
Rapid release fasteners hold more weight than
commercially available detachable fastener systems and attach
and detach with less force. Optional color-change alerts users
when the material is ready to be fastened or removed.
Developed in research funded by a US Army TACOM
program, the interlocking fasteners are made of a CRG-developed
SMP and are designed to support heavy loads
such as armor panels in high-shock or high-vibration environments.
In the field, where time and hold strength are critical, CRG’s
fasteners provide solid support and rapid armor application.
Rapid release fasteners offer simple-to-use,
integrated activation. Coupling increased hold with easy removal,
this technology goes a step beyond conventional detachable
fastening systems.
 Silent Fasteners
Another version of SMP fasteners that came out of this research can be used without heat activation for applications requiring a quiet fastening solution. These fasteners are made with flexible, mushroom-shaped polyps that "snap" together silently. While conventional hook and loop fasteners make loud tearing noises when being removed, silent fasteners, marketed under the trade name Whisper Grip™, make no noise at all. This is a huge advantage for military applications, especially for uniform insignia, uniform fasteners, and other attachment needs when silence is important to survival.
Benefits
• Low-force attachment/detachment
• High fastening strength to
support heavy equipment or detachable signs
• Applies to any surface, even contours
• No extra tools required
• Corrosion resistant
• Aesthetically pleasing, hidden
fastening
• Tamper-proof
• Repeatable process without
damage to the substructure
• Low force required to detach
• No framing needed
• Low sensitivity to environmental
conditions
Some Applications
Shape memory fastening technology shows promise
for military, household, and commercial uses. The following industries
would benefit from smart fastener technology:
• Adaptable storage
• Temporary shelter assembly
• Hatch enclosures
• Architectural detail fastening
• Noiseless insignia fastening
• Noiseless fastening for military clothing
• Sign assembly
• Home and garage storage
• Emergency vehicle equipment
storage
• Underwater storage/equipment
mounting (no corrosion)
• Plant floor dividers/storage
• RV storage
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