Failure Initiation Predictors for Reliability-Based Design of Hybrid Composite Materials

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-09-C-0096
Agency Tracking Number: F08A-025-0133
Amount: $99,719.00
Phase: Phase I
Program: STTR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: AF08-T025
Solicitation Number: 2008.A
Small Business Information
3830 Packard, Suite 110, Ann Arbor, MI, 48108
DUNS: 136770703
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Satha Raveendra
 (734) 973-1600
Business Contact
 Satha Raveendra
Title: President
Phone: (734) 973-1600
Research Institution
 Krista L Campeau
 3003 South State Street
Ann Arbor, MI, 48109 1274
 (734) 936-1289
 Nonprofit college or university
This proposal is concerned with the development of a novel failure initiation and progressive failure analysis (PFA) modeling method for advanced composite structures. The laminate is modeled as a collection of degrading lamina within the framework of lamination theory and executed using user defined subroutines through a commercial finite element software package. In the proposed approach, designated as “progressive failure analysis tool”, (PFAT), computations will be simultaneously carried out in parallel at three length scales, as needed (the laminate level (LAM), the lamina level (LL) and at the level of a fiber/matrix (FM) unit cell representation of the lamina), with strong coupling between the three scales. The results to be obtained will provide the necessary guidance in selecting the most robust methodology to achieve the desired goal of combining initial design with reliability based tools to re-design a composite structure. The proposal utilizes a fundamental physics based approach that is devoid of empirical formulas that have dominated failure prediction tools in composites.

* information listed above is at the time of submission.

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