FATIGUE LIFE PREDICTION BASED ON THREE-DIMENSIONAL STRESS ANALYSIS

Award Information

Agency: Department of Defense

Branch: Navy

Contract: N/A

Agency Tracking Number: 9206

Amount: $453,800.00

Phase: Phase II

Program: SBIR

Solicitation Topic Code: N/A

Solicitation Number: N/A

Timeline

Solicitation Year: N/A

Award Year: 1989

Award Start Date (Proposal Award Date): N/A

Award End Date (Contract End Date): N/A

Small Business Information

Terra Tek Inc.

400 Wakara Wy

Salt Lake City, UT 84108

United States

DUNS: N/A

HUBZone Owned: No

Woman Owned: No

Socially and Economically Disadvantaged: No

Principal Investigator

Name: Jian-juei Wang
Phone: (801) 584-2459

Business Contact

Phone: () -

Research Institution

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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FATIGUE LIFE PREDICTION BASED ON THREE-DIMENSIONAL STRESS ANALYSIS