SYMPOSIA PAPER Published: 01 January 1976
STP27859S

Stress Relaxation in Bending

Source

This paper describes a technique for stress relaxation measurement in bending at ambient and elevated temperatures. This technique utilizes a double-triangle-shaped specimen which is loaded at three points. The load remaining in the specimen at any time during the test is determined using a lift-off technique. This technique satisfies ASTM Recommended Practice for Stress-Relaxation Tests for Materials and Structures (E 328-75). The use of an analytical expression for extrapolation of short-time data to predict behavior at long times is also presented. Data of two copper alloys, phosphor bronze and nickel silver, are extrapolated to estimate the stress relaxation at 100 000 h.

Author Information

Parikh, P
Mechanical Metallurgy Group, Olin Metals Research Laboratory, New Haven, Conn.
Shapiro, E
Mechanical Metallurgy Group, Olin Metals Research Laboratory, New Haven, Conn.
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Details
Developed by Committee: E28
Pages: 106–117
DOI: 10.1520/STP27859S
ISBN-EB: 978-0-8031-4682-2
ISBN-13: 978-0-8031-0547-8