Accession Number : AD0487680

Title :   YIELD AND SECOND-ORDER EFFECTS INDUCED BY CYCLIC TORSION IN COPPER UNDER TENSION.

Descriptive Note : Technical rept.,

Corporate Author : COLUMBIA UNIV NEW YORK INST FOR THE STUDY OF FATIGUE AND RELIABILITY

Personal Author(s) : Wood, W. A.

Report Date : JUN 1966

Pagination or Media Count : 25

Abstract : Evaluation is made of how much recovery processes, yield conditions, and the Poynting or other second-order effects may contribute to the axial creep induced by small amplitude cyclic torsion in copper under tension at room temperature. Results indicate that the significant factors are the yield conditions and the second-order effects, the former contributing most during early cycles and the latter during later. Observations on the yield conditions suggest that the Bauschinger effect has less influence on yield under tension and reversed torsion than might be assumed from classical criteria for yield. Those on the second-order effects show that they can produce suprisingly large axial strain.

Descriptors :   (*COPPER, CREEP), TEMPERATURE, THEORY, MECHANICS, TORSION.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE