FATIGUE LIFE PREDICTION BASED ON THREE-DIMENSIONAL STRESS ANALYSIS

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$453,800.00
Award Year:
1989
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
9206
Agency Tracking Number:
9206
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
400 Wakara Wy, Salt Lake City, UT, 84108
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Jian-juei Wang
(801) 584-2459
Business Contact:
() -
Research Institute:
n/a
Abstract
THE NAVY IS DEVELOPING METHODS TO DETERMINE THE SIZE AND TYPE OF DEFECTS IN HELICOPTER GEARBOXES. WITH THIS KNOWLEDGE A BETTER UNDERSTANDING OF THE FATIGUE-CRACK PROPAGATION CHARACTERISTICS OF THE GEARS AND BEARINGS WILL BE POSSIBLE AND ENHANCE THE ACCURACY IN PREDICTING THE FATIGUE LIFE. THE PURPOSE OF THIS PROPOSAL IS TO UNDERTAKE THIS STEP BY INVESTIGATING THE THREE-DIMENSIONAL STRESS DISTRIBUTION AND THE INFLUENCE OF THE THREE-DIMENSIONAL EFFECTS ON THE STRESS INTENSITY FACTORS ON THE FATIGUE LIFE OF GEARS AND BEARINGS. PROBABILISTIC FRACTURE MECHANICS IS TO BE APPLIED IN THE COUPLING OF THE STATISTIC DISTRIBUTION OF SIZE AND TYPE OF THE DEFECTS AND THE FATIGUE-CRACK PROPAGATION CHARACTERISTICS. EVENTUALLY, A COMPLETE COMPUTER MODEL FOR IMPROVED PREDICTION OF THE FATIGUE LIFE OF THE GEARBOXES WILL BE DEVELOPED IN PHASE II.

* information listed above is at the time of submission.

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