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Three-Dimensional Nonlinear Structural Analysis Methods for Gas Turbine Engine…

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
2006 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
VEXTEC Corporation
PO Box 2287 Bldg. 2, Suite 270 Brentwood, TN 37024-
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2006
Title: Three-Dimensional Nonlinear Structural Analysis Methods for Gas Turbine Engine Metallic Components and Component Assemblies
Agency / Branch: DOD / USAF
Contract: FA8650-06-M-5230
Award Amount: $99,992.00


Air Force engines are required to satisfy both safe-life and fatigue crack growth (damage tolerant) design criteria under the engine structural integrity program (ENSIP). To achieve this requirement, nondestructive inspection techniques are used to detect cracks that can potentially grow to failure within the next inspection interval. However, these nondestructive inspections cannot be performed on wing and require a complete disassembly. Hence, the current life management approach is time consuming and expensive. Phase I will demonstrate feasibility for a three-dimensional nonlinear analysis method for advanced engine prognosis. The proposed methodology will include three dimensional crack growth in components and assemblies of components, non-linear material behavior, surface-treatment induced residual stress effects, and complex mission loading, coupled with detectable sensor parameters. The computational methods will be consistent with a probabilistic prognosis system and the design system developed for JSF. The approach will use engine sensor data acquired by the engine control and incorporate an analytical transfer function to obtain the instantaneous damage state. The resulting damage state will then be used to derive the remaining component durability.

Principal Investigator:

Richard Holmes
Mgr Technology

Business Contact:

Loren Nasser
Small Business Information at Submission:

750 Old Hickory Blvd, Building 2, Suite 270 Brentwood, TN 37027

EIN/Tax ID: 582529317
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No