Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

Fatigue cracks have been found in many thick annular components in aging helicopters such as the pitch shaft, rotor hub, and connecting link in H-46 helicopters. Fatigue cracks often occur on the outer and inner surface of the annular components and may lead to a critical failure. To keep aging helicopters in operation, these cracks must be identified and monitored. At the present time, visual inspection is still the major means to detect fatigue cracks in these components. Obviously, there is a need to develop an effective and efficient technique for detecting cracks in thick annular components.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17A

Chapter

Chapter 1: Standard Techniques

Section

Guided Waves and Applications

Pages

193-200

DOI

10.1007/978-1-4615-5339-7_24

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

An Experimental Study of Crack Detection in Annular Components by Ultrasonic Guided Waves

La Jolla, CA

Fatigue cracks have been found in many thick annular components in aging helicopters such as the pitch shaft, rotor hub, and connecting link in H-46 helicopters. Fatigue cracks often occur on the outer and inner surface of the annular components and may lead to a critical failure. To keep aging helicopters in operation, these cracks must be identified and monitored. At the present time, visual inspection is still the major means to detect fatigue cracks in these components. Obviously, there is a need to develop an effective and efficient technique for detecting cracks in thick annular components.