Rain Erosion Modeling for Hypersonic Thermal Protection System (TPS) and Structures

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-07-C-7626
Agency Tracking Number: 053-1109
Amount: $749,635.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
150 Dow Street, Tower Two, Manchester, NH, 03101
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John Dignam
 Vice President
 (603) 624-9197
Business Contact
 Jean Dunn
Title: Financial Administrator
Phone: (603) 624-9197
Email: jdunn@mentissciences.com
Research Institution
Within the hypersonic missile community, it is generally known that Mentis Sciences, Inc. (MSI) is developing a candidate Quartz/Polysiloxane radome solution for the Patriot Advanced Capability (PAC3) system. This solution is presently in the process of being evaluated for the relevant hypersonic rain erosion environs and full-scale thermal/structural loading. At this time, it has exceeded all mechanical, thermal, and electrical and cost requirements, however it too has experienced significant material loss during recent full-scale sled tests through a rain field. As a result of these tests, and the modeling research conducted during the Phase I effort, MSI investigated alternative 3D reinforced fiber architectures to address the issue of material loss and or wear. Phase I results indicate that high shear stresses due to droplet impact precipitated delamination of the 2D laminates, which ultimately lead to tensile failure of the outer fiber layer. Repeated impacts coupled with aerodynamic shear caused dramatic material loss. The Phase I effort systematically quantified the erosion event, and ultimately led to the investigation of 3D fiber architectures. This effort will be supported by The University of Delaware's Center for Composite Materials (CCM) with extensive material modeling to determine the loading interaction with the material and different 2D and 3D fiber architectures as well as subscale wear testing to screen and rank candidate materials.

* Information listed above is at the time of submission. *

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