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MEASUREMENT OF DUCTILE MATERIAL DAMAGE *

2001; Taylor & Francis; Volume: 29; Issue: 4 Linguagem: Inglês

10.1081/sme-100107622

1525-612X

Marcı́lio Alves,

Microstructure and Mechanical Properties of Steels

Abstract The damage related to the voids present in ductile materials is an important parameter in some failure criteria. It is possible to express this damage in terms of changes in the elastic modulus, hardness, and electrical potential. This article reports on some damage measurements in a mild steel specimen subjected to traction using different experimental techniques. The results indicate different values for the damage on the same specimen, according to the technique employed, suggesting that the damage parameter used in a theoretical model must be carefully related to the appropriate constitutive law. *Communicated by T. Santos. ACKNOWLEDGMENT This research was funded by CAPES, a Brazilian funding agency, and the Impact Research Centre at the University of Liverpool. Thanks are due to Mr. H. Rapp, from Struers GmbH, Germany, for his assistance with the microhardness tests and to Dr. R. S. Birch of the Impact Research Centre at the University of Liverpool for discussions during the experiments. The support of Prof. Norman Jones, Director of the Impact Research Centre at the University of Liverpool, is greatly acknowledged. Notes *Communicated by T. Santos.