Shape Memory Polymer Bladder Tooling

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-10-C-0030
Agency Tracking Number: N081-030-0307
Amount: $749,147.00
Phase: Phase II
Program: SBIR
Awards Year: 2010
Solicitation Year: 2008
Solicitation Topic Code: N08-030
Solicitation Number: 2008.1
Small Business Information
Cornerstone Research Group, Inc.
2750 Indian Ripple Road, Dayton, OH, 45440
DUNS: 130020209
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Joel Everhart
 Research Engineer
 (937) 320-1877
 everhartjj@crgrp.com
Business Contact
 Stephen Vining
Title: VP Government Programs
Phone: (937) 320-1877
Email: viningsd@crgrp.com
Research Institution
N/A
Abstract
Cornerstone Research Group Inc. (CRG) proposes to demonstrate the benefits of shape memory polymer (SMP) bladder tooling for fabrication of a composite Navy rotorcraft part. CRG’s SMP bladder tooling reduces labor costs and manufacturing time for fabricating complex composite parts. Conventional silicone or latex bladders are not rigid enough to support composite lay-up before custom molding. This process is labor intensive, can produce seams, wrinkles and bridging, and often results in inaccurate part shapes. These drawbacks have led to the theory of an inflatable bladder core used as the mandrel, but conventional bladder cores lack the structural integrity required for accurate composite lay-up. SMP bladders operate both as rigid mandrels and inflatable bladder cores initially providing a rigid, durable surface for composite lay-up, then flexibility and inflatability when the part is formed against the interior of the final mold. Phase I demonstrated SMP bladder tooling feasibility for composite fabrication of a representative part. Phase II will focus on using SMP bladder tooling to fabricate a full-scale composite Navy rotorcraft part.

* information listed above is at the time of submission.

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