System for automated fatigue crack growth testing under random loading

Sunder, R (1985) System for automated fatigue crack growth testing under random loading. International Journal of Fatigue, 7 (1). pp. 3-12.

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Procedures have been developed for computer-controlled crack propagation testing under random load sequences. They include certain features which are not available in conventional systems, but which appear essential for random load testing. These include the capability to simulate any desired K-function on standard laboratory specimens and continuous on-line rainflow analysis of the test load sequence to exclude cycles falling below given values of threshold stress intensity, stress level or range. The system also includes a procedure for automated crack-opening displacement based crack opening/closing load level measurement. Experimental studies on Al-Cu alloy sheet material point to a requirement for development of standards for spectrum loading crack growth testing.

Item Type: Article
Uncontrolled Keywords: Materials-Crack Propagation;Automated testing;Crack length measurement;Load spectrum representation;Mean load control;On-line fatigue cycle analysis;Fatigue of materials
Subjects: ENGINEERING > Structural Mechanics
Depositing User: Ms. Alphones Mary
Date Deposited: 08 Mar 2006
Last Modified: 24 May 2010 04:08

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