US Patent No: 8,210,052
Number of patents in Portfolio can not be more than 2000
Method for forecasting the fatigue damage of a solid rocket motor through ignition
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Jul 3, 2012
Issued date -
May 20, 2010
filing date -
12/802,450
serial no -
In Force
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Abstract
The invention includes a method for forecasting fatigue damage of a solid rocket motor through ignition, where over the lifetime of the motor it can be exposed to a plurality of stressing events, which may have a broad spectrum of mechanical loads with multiple modes. For instance, a mode may be a change in the thermal contraction or a change in a direct mechanical load. The method expresses all stressing events in terms of a common mode. The thermal contraction is the selected common mode measured in units of stress. The stress is proportionally adjusted according to the conditioning temperature, the stress free temperature, the pressures, and the age. Cumulative damage for the time before and after ignition is determined. Finite element analysis reference points are adjusted for the stressing events.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 7,212,696 Fiber optic damage detection system for composite pressure vessels | 1 | 2006 | |
| 2009/0144,038 ANALYZING STRUCTURAL DURABILITY IN THE FREQUENCY DOMAIN | 1 | 2007 | |
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| 2010/0332,153 Method of Determining Fatigue Life and Remaining Life | 1 | 2007 | |
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| 2007/0135,987 System and method for turbine engine igniter lifing | 1 | 2005 | |
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| 4,722,062 Method and apparatus for the control or monitoring of thermal turbomachines based on material stresses | 12 | 1985 | |
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| 2011/0214,509 METHOD FOR PREDETERMINING THE FATIGUE LIFE OF POLYMER COMPOSITION | 1 | 2009 | |
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| 7,387,031 Method for monitoring corrosion damage to a metal sample | 3 | 2006 | |
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| 5,038,295 Solid propellant service life analysis via nondestructive testing | 8 | 1989 | |
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| 6,301,970 Cumulative damage model for structural analysis of filed polymeric materials | 15 | 1999 | |
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