Fatigue Measurement for Remaining Life
Abstract
The objective of this work was to follow track pin surface residual stress as a function of fatigue test cycles. Twenty pins were selected from a group of 250 new T-142 track pins for this test. They were selected on the basis of being representative of pins having median values of surface residual stress as received from the shot peening operation in manufacturing. Residual stress measurements were made in both the longitudinal direction and hoop/transverse direction at three spots on each pin. The spots were at areas most likely to develop cracking and eventual failure. The equipment used for residual stress measurement was automated X-ray diffraction equipment. Surface residual stress was found to remain virtually unchanged throughout the entire two million cycles of fatigue testing. Pins failing prior to the two million cycle test limit displayed no residual stress indication that failure was eminent.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1984
- Accession Number
- ADA149635
Entities
People
- S. B. Catalano
Organizations
- United States Army Tank Automotive Research, Development and Engineering Center